The Professional
LOCKSMITH
Dictionary
©2022 by the Lock Industry Standards and
Training (LIST) Council
[
1 Column Version: 11-08-22 ]
November,
2022
Copyright ©, 1982 by the ALOA Sponsored National Task Group for Certified Training Programs, Master Keying Study Group
Copyright ©, 1983 by the ALOA Sponsored National Task Group for Certified Training Programs, Master Keying Study Group,
Revised June,
1984; Revised April, 1987; Copyright ©, 1996 by the Lock Industry
Standards and Training Council, Master Keying Study Group
Copyright ©, 1997,
2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009, 2010, 2012,
2014, 2017, 2019, 2021 by the Lock Industry Standards and Training
Council
The Study Group and LIST Council
Members have included:
Jerome Andrews |
*Vaughan
Armstrong |
|
Jimmy Benvenutti |
*Greg
Brandt |
|
Breck H. Camp |
*Casey
Camper |
|
Joe Cortie |
*Bobby
DeWeese |
|
*+Billy
B. Edwards Jr |
+Ken Ehrenreich |
|
G. L. Finch |
Ralph Forest-Ball |
|
Dorothy Friend |
Kristine Gallo |
|
Ray Hearn |
+A. J. Hoffman |
|
*John
Hubel |
Wiegand Jensen |
|
David J. Killip |
Mike Kirkpatrick |
|
*William
M. Lynk (Chairman) |
Gordon S. Morris |
|
Dan Nicholson |
Brian O’Dowd |
|
Don O’Shall |
*Jon
Payne |
|
Lloyd Seliber |
Sharon Smith |
|
John Truempy |
Roger Weitzenkamp |
|
Jym Welch |
*Tyler
J. Thomas |
|
*John
Soderland |
*William
Mandlebaum |
|
*Wayne Winton | ||
*Indicates
current participating members +Indicates
Past Chairman |
All
Rights Reserved.
Permission
is hereby granted to reprint terms and definitions contained herein
with the following stipulations:
1. Terms and definitions
are to be reprinted in their entirety.
2.
Credit
is to be given to the Lock Industry Standards and Training (LIST)
Council, as shown below:
The Professional LOCKSMITH Dictionary
©Lock Industry Standards and Training
(LIST) Council ♦ Reprinted
with Permission
Printed in U.S.A.
In 1982 the LIST
Council’s predecessor released to the industry The Professional Glossary of Terms Relating to Cylinders, Keys and
Master Keying. The Associated
Locksmiths
of America, Inc. was the first to publish and distribute it. The
definitions and terminology in the glossary have since been adopted by
most of the manufacturers, publications and associations as our
industry standard and many manufacturers offer a printed version as
part of their factory training.
In 1991 The LIST
Council was asked by ALOA
and others to complete what would amount to a Dictionary
for
Locksmiths. We are
nearly finished with that work and are pleased to submit this
installment of the remaining terms that have been identified as
specific to our industry.
When making a definition of a term,
we applied the following rules to the term:
1)
Is the term listed in “Webster”?
2)
Is the definition there the same meaning used in our
industry?
To us, “Webster”,
means a typical pocket dictionary, which could be obtained easily
and on short notice from any grocery store, which has a pocket book
display or any online standard dictionary such as http://www.Dictionary.com.
If the answer to either of the questions above was no, we felt the
term must be in our dictionary, otherwise it was common usage which
anyone could define.
Because there is generally more than one term
in use from one geographic area to another, we established the most
popular term that most closely describes what it means as the
“primary” term to be defined, unless it has different opposing
definitions. With that established, the definitions have to meet
the following rules:
1. It must describe the subject of
the term without graphics.
2. It must describe ONLY the subject of the term.
3. It must avoid using the term in
the definition when practicable.
If you have a technical objection to any definition, or
for Peer Review, visit the LIST Council web site at:
http://www.ListCouncil.org and use the FEEDBACK
option.
Copyright © 1989, 1990, 1995, 1996, 1997, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2010, 2012, 2014, 2017, 2019, 2021, 2022 LIST Council - Printed in USA ♦ Al Rights Reserved.
The following is the
combined work of these two groups.
===========================================================
that letter heading in the Dictionary:
© A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
The Professional LOCKSMITH Dictionary
©2022 by the Lock Industry Standards and
Training (LIST) Council ♦ Reprinted
with Permission
__________________________________________________________________________________________
160 prep
n. a standard door preparation
which consists of a 2-1/8" cross-bore with a 2-3/8" backset, and a 1"
edge-bore with a mortise 1" wide and 2-1/4" high
161
prep
n. a standard door preparation
which consists of a 2-1/8" cross-bore with a 2-3/4" backset, and a 1"
edge-bore with a mortise 1-1/8" wide and 2-1/4" high
A2
n. an increment of .0125"
typically used in a small format interchangeable core (SFIC)
A3
n. an increment of .018"
typically used in a small format interchangeable core (SFIC)
A4
n. an increment of .021"
typically used in a small format interchangeable core (SFIC)
A
label
n.
a
classification by Underwriters Laboratories for doors with 3 hour
rated fire protection
access
control
n.
any
barrier or device, either natural or man made, that limits or
prohibits, free or unlimited entry or exit
access
control
cylinder
n. a replacement for a
mechanical cylinder which incorporates electronic audit and/or
authorization and allows the original host lock to function without
additional wiring or hardware modifications
access
control
key fob
n. any device other than a key
designed to allow a token to be used and carried on a key ring
accessory
position
n.
the position of an ignition switch intended to permit the use
of radio or other equipment without turning on a drive train component
active
case
n.
the exit device element mounted on the stile of the door on
which the lock is located
active leaf
n.
the single door of a pair on which the locking hardware is
mounted
active
relocking
device
n. a mechanism that places its
bolts to immobilize the locking bolts and activation via attack
preventing it from retracting those bolts
n. one which requires
turning the item before it may be released or removed
active
retainer
n.
1.
a cylinder mouting mechanism which requires that the plug be rotated
before the cylinder can be removed, 2. a plug mounting mechanism which
requires that the plug be rotated before the retainer can be removed
from the plug
actuator
n.
a device, usually connected to a cylinder, which, when
activated, may cause a lock mechanism to operate
ADA
abb.
Americans with Disabilities Act
adjustable
ball
hinge
n.
a
pivot with adjustable height for narrow stile doors
adjustable
collar
n. a spring-loaded cylinder
collar which can fill a range of gaps between the cylinder head and
the door or escutcheon surface
adjustable
mortise
cylinder
n. any externally threaded
cylinder whose length can changed for a better fit in doors of varying
thickness
AED
abb.
anti-explosive device
AFTE
abb.
Association of Firearm and Toolmark Examiners
after hours
depository
n.
a locked receptacle affording secure retention of items
beyond normal business times
AHC
abb.
Architectural Hardware Consultant (as certified by DHI)
AHD
abb.
after hours depository
AHJ
abb.
authority having jurisdiction
alarm system
n.
an arrangement of electrical and/or electronic components
which detect and report dangers, such as fire or intrusion
aligning tube
n.
1. a lock
component which orients and joins the latch and knob spindles of
certain bored locksets, 2. in some combination locks, a
conduit which houses the spindle, located between the dial ring and
the lock
alignment
pin
n. the perpendicular
projection from a master lever in a master keyed lever tumbler lock,
which engages a group of combination levers and moves their gates to
line up with the fence
all-section
key blank
n.
the key section which enters every keyway of its multiplex
key system
ALOA SPAI
abb.
Associated Locksmiths of America Security Professionals
Association, Inc.
aluminum
door
n. a door composed of an extruded or plate aluminum frame and a lite which is the major door surface
AKL – abb. All Keys Lost
Americans with
Disabilities Act
n.
a US federal law dealing with minimum standards of building
accessibility, as well as other issues concerning individuals with
disabilities
angularly
bitted
key
n.
a key which has cuts made into the blade at various degrees
of rotation from the perpendicular
n. an audible and/or visual signaling device
abb.
American National Standards Institute
ANSI strike
n.
any of many strikes
designed to fit door and frame preparations as specified in the
applicable document in the ANSI A115 series, common usage refers to a
strike with dimensions of 4 7/8" X 1 1/4"
ANSI 117.1
n.
that section of the American National Standards Institute
documents pertaining to handicap access
anti‑friction
adj.
pertaining to a feature which, upon contact with the strike,
allows smoother operation of a latch bolt
adj. of or pertaining
to an access control system feature designed to prevent consecutive
use of a given credential to allow entry by more than one person at a
time
n. a two part system
installed on a spindle shaft and safe body to prevent the spindle
shaft from being punched into the lock case
anti-rap
adj. specifically designed to
preclude bypass via attack based on sharp, repetitive blows to the
mechanism
anti
slip
positioned
adj.
of
or pertaining to the orientation of a cam on a profile cylinder which
requires rotation before it may be removed from the lock case
anti-wrench
reinforcement
spring
n. a lock cylinder spring
designed to protect the inner and outer halves of a profile cylinder
from being forcibly separated as a means of brute force entry
arbor
n.
the
shaft from the handle to the inside of the safe
architectural
finish
code
n. one of a series of
specification codes used to indicate the color and texture of a metal
end product that can be installed. Some finish specifications also
note the base metal characteristics and processes used to obtain the
end product.
architectural
hardware
n.
1. fittings
applied to protect a surface of, or to facilitate use of movable
members in a building such as doors, windows, or cabinets,
2. various
fixtures used in building construction
area
zoning
n. the
standard of limiting access, or detecting access, in multiple areas
smaller than the entire installation
arm
(of
a closer)
n. door closer linkage which
connects the closer to the frame or door, depending on the mounting
style
armored
escutcheon
n. usually a hardened ring,
typically beveled, that resists physical attack
armored
face
plate
n.
one that conceals all lock and/or cylinder mounting screws
ASIS
abb.
American Society for Industrial Security
assembly
occupancy
n.
those buildings or areas which are designated as places of
assembly according to life safety or building codes
associated
change
key
n.
one which is related directly to particular master key(s)
through the use of constant cuts
associated
master
key
n.
one which has particular change keys related directly to its
combination through the use of constant cuts
ASTM
abb.
American Society for Testing and Materials
astragal
n.
a
molding attached to the active leaf of a pair of doors and overlapping
the inactive leaf
ATM
abb. automatic teller machine
ATT
abb.
attendant's key
attack
resistance
adj.
design qualities of a product that render brute force
physical defeat methods less effective or ineffective
attendant's
key
n.
a selective master key used in a hospital keying system
audit
overrun
n. a means of attack designed
to eliminate entries in an access control database, overfilling and
scrolling off previous entries
audit
trail
n. a specific group of events
selected from transaction records and listed sequentially
authority
having
jurisdiction
n. in any particular situation,
installation, or location, the person or office which has the
responsibility and authority to select, interpret and enforce the
applicable building, life safety, disability or fire codes
automatic
closing
adj. pertaining to a door which
is equipped with a door closer, or other device to close it without
manual intervention. Frequently found in Life Safety and fire code
requirements.
automatic
deadbolt
n.
one designed to extend itself fully when the door is closed
automatic
flush bolt
n.
one designed to extend itself when both leaves of the pair of
doors are in the closed position
automatic
key
machine
n.
one capable of cutting
keys with manual operations limited to loading and unloading keys
automatic
teller machine
n.
a device for dispensing cash, receiving deposits and
performing other banking functions upon presentation of the proper
authorization
auxiliary lock
n.
any lock installed in addition to the primary lockset
auxiliary
spring
n. a secondary spring used to
support the lever handles of a lockset
auxiliary
spring
rose
n. oversized trim that interlocks with a lock chassis and external lever as a means to mount an auxiliary spring
© A
B C D E
F G H I
J K L M
N O P Q
R S T U
V W X Y
Z
b-t
abb. bow-to-tip
B
label
n.
a
classification by Underwriters Laboratories for doors with 1 1/2 hour
rated fire protection
back
plate
n.
a thin piece of metal, usually with a concave portion, used
with machine screws to fasten certain types of cylinders to a door
backcheck
n.
the resistance provided by a door closer as a door is opened
backset
n.
the distance between the center of a cross‑bore and the bolt
edge of a door or drawer
baffle
n.
a
device or devices designed to deter the retrieval of items through a
depository opening
balance
(a
combination)
v. v. to verify a combination may be dialed slightly higher and slightly lower than the set combination to establish the wheel gates have anequal opening tolerance in both directions
n. the place in a
combination wheel where material has been eliminated to provide an
equal distribution of weight over the entire wheel relative to the
axis
balanced pinning
n.
a
process used to ensure that all pin stacks are, or nearly are, equal
ball
bearing
n. 1.
a metal sphere used in the pin stack to accomplish some types
of hotel or construction keying,
2. a sphere,
usually made of steel, used by some lock manufacturers as the bottom
element in the pin stack in one or more pin chambers,
3. any metal
sphere used as a tumbler's primary component,
4. used as a
means of repairing a drilled hole in a safe when welded in place
ball
bearing
hardplate
n. a treated metal plate that
contains metal spheres, typically two types, embedded in a honeycomb
pattern, or free moving within a hardplate envelope
ball
bearing
hinge
n.
one which uses metal spheres between its knuckles to reduce friction
ball
catch
n. a latch which uses spring
pressure to force a metal sphere into a recess in its strike
n. a spring loaded
metal sphere in a door closer arm assembly that acts to limit arm
travel
ball locking
adj.
a method of retaining a padlock shackle into its case using
metal sphere(s) as the bolt(s)
barium
ferrite
card
n.
an
access control system credential consisting of magnetized ferrite
embedded in a plastic card with polarity and location being important
features
barrel bolt
n.
a surface mounted slide bolt which has a cylindrical shape
barrel
key
n.
a type of bit key with a hole drilled into the shank from the
tip
barrier free
n.
having to do with the absence of restrictions to access by
the handicapped
Barron, Robert
the Englishman
credited with the invention of the double‑acting lever tumbler in 1778
Basic Building
Code
n.
former name for BOCA National Building Code
battery
eliminator
n.
an electric device designed to provide energy to equipment
normally requiring batteries for operation
BBC
abb.
Basic
Building Code
BCH
abb. bolt control handle
bell box
n.
the protective enclosure for a bell or other alarm sounding
device
Bell
type
key
n. a key whose cuts are in the form of wavy grooves milled into the flat sides of the key blade. The grooves usually run the entire length of the blade.
bent spring - n. a padlock mechanism that is flexed by a key and moves to unlock a shackle
n.
the pitch on the leading edge of a door which allows
clearance for closing
bevel
(of
a lock)
n.
the pitch of the face designed to match the bevel of a door.
Some locks have an adjustable bevel.
bezel
n.
a threaded collar commonly used to secure certain cylinder or
lock assemblies
BHMA
abb.
Builders Hardware Manufacturers Association
bible
n.
that portion of the cylinder shell which normally houses the
pin chambers, especially those of a key-in-knob cylinder or certain
rim cylinders
bicentric
cylinder
n.
a cylinder which has two independent plugs, usually with
different keyways. Both plugs are operable from the same face of the
cylinder. It is designed for use in extensive master key systems.
bicycle
padlock
n.
a padlock with sufficient shackle clearance to secure a
bicycle
bi-directional
cylinder
n.
a cylinder which may be operated in a clockwise and
counterclockwise direction by a single key
bi-fold
door
n.
a door with two or more sets of hinges, the additional set(s)
allows the door to have an accordion action when opened
bilevel
capable
n.
typically
a key that can operate two compatible mechanisms which have different
security features
binary cut key
n.
a key whose combination only allows for two possibilities in
each bitting position: cut/no cut
binary
type
cylinder or lock
n.
a cylinder or lock whose combination only allows for two
bitting possibilities in each bitting position
biometric
adj.
of or pertaining to a lock with a hybrid mechanism, part of
the mechanism identifies a physical attribute such as finger print,
voice print, etc. while another part is a mechanical mechanism
bit
1.
n. the part of
the key which serves as the blade, usually for use in a warded or
lever tumbler lock, 2. v.
to cut a key
bit
height
n. a measurement from the post
of a bit key outward to the end of the bit
bit key
n.
a key with one or more projecting bits
bit
thickness
n. a measurement of the bit
from one side to the other side
bit
width
n. as inserted into a lock, a
measurement from the leading edge to the trailing edge of a bit
bitting
n.
1. the number(s)
which represent(s) the dimensions of the key,
2. the actual
cut(s) or combination of a key
bitting depth
n.
the distance a cut is made into the blade of a key
bitting
list
n.
a listing of all the key combinations used within a system.
The combinations are usually arranged in order of the blind code,
direct code, and/or key symbol.
n. the specification
of how a written combination is to be applied to bitting positions of
a key (tip-to-bow, etc.)
bitting
position
n.
the location of a key cut
blade
n.
the portion of a key which may contain the cuts and/or
millings
n. 1. in a cylinder key, the distance from the bottom
of the blade to the top of the uncut surface, 2. in a multiply bitted
key, the distance from a registration point to the top of the uncut
surface
n.
in
a cylinder key, the distance from the tip of the key to the bow stop
or the bow
n.
in
a cylinder key, the distance from one non-bitted surface to the
opposite non-bitted surface
blank
adj.
uncut, see also “key blank”
blind
code
n. a
designation, unrelated to the bitting, assigned to a particular key
combination for future reference when additional keys or cylinders may
be needed
block
master
key
n.
the one pin master key for all combinations listed as a block
in the standard progression format
blocking
lever
n.
a
lever in a safe deposit lock which blocks the renters key from
completely entering the lock until the guard key has been inserted and
turned
BMK
abb.
block master key
BOCA
abb.
Building Officials and Code Administration International
BOCA National
Building Code
abb. Building Officials and Code
Administration International (formerly Basic Building Code)
bolt
n.
any movable projection which blocks the movement of one
object relative to another
bolt
control
handle
n.
a lever or wheel shaped device on a safe or vault door that is used to
extend or retract the boltworks
bolt
cup
n.
a
thimble shaped device in a safe door frame that a locking bolt extends
into when the door is closed and the bolt(s) are extended
bolt
head
n. the leading edge of a lock
extension that enters a strike
bolt
motor
n. 1.
a mechanical device that extends and retracts the door
bolt(s)of a safe, normally engaged by closing the door and disengaged
by a time lock, 2.
a mechanical device (usually electrically powered) that
extends and retracts the bolt of a safe lock.
It is commonly disengaged by an electronic input such as that
from a keypad.
bolt
sensor
switch
n. a switch installed to detect
when a lock bolt is extended or retracted
bolt
shim
n.
a
plate or plates mounted to the frame of a vault to provide equal
gapping for each locking bolt
bolt
tail
n. the part of a bolt retained
in the lock case that contains the bolt slot and maintains bolt
alignment
boltwork
button
n.
the component which automatically triggers extension of the
locking bolt(s) when the door is in the closed position
boltworks
n.
1. the
combination of bars, rods, plates and linkages in a safe door designed
to hold the door in the locked or unlocked position depending on the
status of the lock itself, 2. any part of a lock other
than a cylinder, turnpiece, or operating handle that affects movement
of, or the ability to move, the bolt
bond
box
n.
the removable container within a safe deposit box compartment
bored lock
n.
a lock for a door prepared with one or more cross‑bores and
one or more edge‑bores
borescope
n.
an
internally lighted optical instrument for viewing normally concealed
or inaccessible components
boring jig
n.
a tool, temporarily affixed to a door, which provides a
template structure to guide drill bits properly when preparing for the
installation of specific hardware
bottom of
blade
n.
the portion of the blade opposite the cut edge of a single
bitted key
bottom
pin
n.
usually a cylindrical shaped tumbler which may be conical,
ball shaped or chisel pointed on the end which makes contact with the
key
v. a method used to
open certain safes involving dropping the safe and relying on gravity
and inertia to move the bolt and open the safe
bow
n. the portion of the key which serves as a grip or handle
bow stop
n.
the element
located near the key grip or handle that physically limits the
distance a key will enter the keyway
n. an order of reading/recording a bitting combination
box of wards
n.
a complete unit of intricate wards installed in or on a lock
case
box strike
n.
a strike equipped to line the bolt cavity for both aesthetic
and protective purposes
brace
Lock
n. a deadbolt lock that engages
an independent bolt, one end of which is mounted in the floor away
from the door
Bramah, Joseph
the Englishman
who had the world's first patent of a locking mechanism in 1784. It was the first lock
incorporating a cylinder whose key
did not contact the lock bolt directly.
Bramah type
lock
n.
a lock or cylinder using a mechanism with sliders, normally
arranged in a circle
bridge
assembly
n.
a
removable frame that contains the wheel pack and wheel post that is
often found in mechanical vault locks
bridge ward
n. a center ward attached to the interior of a lock by means of a bracket
Brink Function
n. function of a cylinder with the plug milled so a specific key will only turn in one direction
broach
1. n. a tool used to cut the keyway into the cylinder plug, 2. v. to cut the keyway into a cylinder plug with a broach
building code
n. a set of codified required standards for structures or construction
building
master key
n.
one which operates all or most master keyed locks in a given
structure
build‑up
dimension
n.
1. the distance
between two different shear lines, as expressed in units of the
manufacturer's increment or as an actual measurement,
2. the dimension
of the buildup pin required in a particular chamber, which will allow
one key to operate at the plug shear
line
and a different key to operate at a different shear line
build‑up pin
n.
the additional element of a pin stack required to allow
operation at different shear lines in a cylinder
bullet
catch
n.
a friction catch with a projecting latch which is spherical
or dome shaped
bump
key
n. a lock picking key
with uniform steeples between cuts that is forced further into the
lock via impact
bung
n.
a
threaded cap, usually used to secure the handle shaft on the inside of
a vault door
burglar
alarm
n. a system designed to detect
and report conditions which may indicate intrusion or attempted
intrusion
n.
a
small safe, typically with a UL rating, designed to resist burglary
attempts
burglar
resistant
adj.
of or pertaining to a security container designed to resist
forcible entry for a specified period of time determined by the rating
of the container
button
knob
n.
in a lockset, the handle that includes a round mechanism that
locks out access when activated
n.
an
automotive ignition component that triggers an alarm when the key is
in the ignition and a door is open without the engine running
bypass key
n.
the key which operates a key override cylinder
by‑pass tool
n.
a device that neutralizes the security of a locking device,
or its application hardware, often taking advantage of a design
weakness
by-passing
door
lock
n.
a lock with a bolt that extends to block parallel movement of
another door
by-passing
sliding door
n. Two doors mounted on tracks parallel to each other that when one or both are slid to opposite extremes block the opening. Typically, one may be moved behind the other to allow access
© A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
C
label
n.
a
classification by Underwriters Laboratories for doors with 3/4 hour
rated fire protection
cabin-door
hook
n. a U-shaped latch
that pivots to encircle a strike projection
cable wired
remote relocker
n.
a
spring loaded relock, triggered by release of the attached wire
abb.
the
title ‘Certified ACE Instructor' as awarded by ALOA SPAI
abb. the title
'Certified Automotive Locksmith' as awarded by ALOA SPAI
cam
n.
1. a lock or
cylinder component which transfers the rotational motion of a key or
cylinder plug to the bolt works of a lock,
2. the bolt of a
cam lock
cam lock
n.
a complete locking assembly in the form of a cylinder whose
cam is the actual locking bolt
cane
bolt
n. a surface mounted deadbolt
designed to be moved by hand via a 90º bend in the bolt that serves as
a handle
cap
1.
n. a spring
cover for a single pin chamber, 2. n.
a part which may serve as a plug retainer and/or a holder for
the tailpiece, 3.
v. to install a
cap
capping block
n.
a holding fixture for certain interchangeable cores which
aids in the installation of the caps
captains
wheel
n. 1. a
spoked handle on a safe used to extend or retract the bolts, 2. a
spoked handle on a safe used to engage or disengage the pressure
system
captured
combination
bit position
n.
the position where a movable key insert is placed on a key
captured
hinge
n.
a
hinge system for safes where the door may not be lifted off the body
of the safe without the removal of one of the hinge blocks
card
access
system
n. an access control system
that utilizes a controlled security card as the credential
card
holder
n.
a person to whom a card has been issued
card reader
n.
a device which interprets coding resident on or in cards
carriage
n. 1.
the movable assembly of a key machine which supports the key
vise(s), 2.
a changeable part of a clipper that holds the key blank
carry
bar
n. the part of a multi-bolt
safe boltworks to which the bolts are attached
case
n.
the housing or body of a lock
case cover
n.
the portion of a lock case which is designed to be removable
to allow access to the mechanism
casement
window
n.
a window with a sash which pivots or swings to open
case ward
n.
any ward directly attached to or projecting from a lock case
catch
n. any device that holds a door
closed and may be released by simply pushing or pulling on the door
CBOK
abb.
construction
breakout key
CCW
abb. Counter Clockwise, as used in combination dialing instructions
abb.
the
title 'Certified Electronics Locksmith' as awarded by ALOA SPAI
central
processing
adj.
of
or pertaining to an access control system in which all or most control
functions are performed by the main computer
central
station
n.
a location designed for the express purpose of processing
status signals for multiple alarm systems
certificate of occupancy
n.
a document, granted by the authority having jurisdiction,
permitting occupancy or use
abb. the title 'Certified Fire Door Inspector' as awarded by ALOA SPAI
abb.
the
title 'Certified Forensic Locksmith' as awarded by ALOA SPAI,
may be followed by a specialty name
chain
bolt
n.
a spring biased bolt operated by an attached chain, typically
for mounting to the top of a door
chain
lock
n.
a device used to secure property with interlocking links and
secured on both ends by a slide plate or a key locking device
chamber
n.
any cavity in a cylinder plug and/or shell which houses the
tumblers
change index
n.
the point on a key changeable combination lock dial ring to
which the old and new combinations must be dialed when changing the
combination
change
key
n.
1. a key which
operates only one cylinder or one group of keyed alike cylinders in a
keying system, 2.
any device that is used to mechanically or electronically
allow resetting of certain key or combination locks, see also "reset
key" #1
changeable
bit
key
n.
a key which can be recombinated by exchanging and/or
rearranging portions of its bit or blade
changeable
fence
n. the fence of a
lever tumbler lock composed of multiple segments which may be set to
various positions in order to change the combination of the lock
changeable
lever
n. a lever tumbler typically
made in two or more pieces which can be variably positioned with each
other to change the effective location of the gate
changeable
tumbler
n. a tumbler whose reference
size can be changed mechanically without removal from the lock or
cylinder
chassis
n. the part of a cylindrical
lockset that contains the actuating mechanism and has a means for
mounting trim and a bolt
check
pin
n.
a
device resembling a bottom pin, found in a non-traditional chamber,
used to restrict the rotation of the plug unless a specific area of
the key is cut
cheek
n. a projection from a lock
case that serves as a guide or race for another part
abb. the title 'Certified Hardware Installer' as awarded by ALOA SPAI
n.
one
which incorporates or includes an electronic component that
communicates with another vehicle component to allow or deny starting;
see also, Vehicle Anti-Theft System, transponder key, remote head key,
integrated head key
Chubb shackle
n.
a hinged shackle with a pierced hole for the bolt in its
movable end
CIL
abb.
the
title "Certified Institutional Locksmith" as awarded by ILA
circular
strike
n.
a
typically round, finished strike, usually driven into place in a
drilled hole
CJIL
abb.
the
title "Certified Journeyman Institutional Locksmith" as awarded by ILA
CJL
abb. the title Certified
Journeyman Locksmith as awarded by the Professional Locksmith
Association of Alberta
CJS
abb.
the title "Certified Journeyman Safecracker" as awarded by
NSO
CK
abb.
change key
cladding
n.
an outer casing, usually metallic, typically filled with
concrete to protect a safe against theft or penetration
clamshell
n. the two piece housing
(usually plastic) that encases the upper steering column and ignition
lock on some automotive applications
claw bolt
n.
a bolt with one or more fingers, which extend out of the bolt
and lock behind the strike as the bolt reaches the locked position
clear opening
n.
a portal providing clearance through which passage is
unhampered
clevis
n.
a device to permanently attach a chain to a padlock
clipper
n.
a hand held key bitting punch, often incorporating a
trigger‑like handle
abb.
the
title 'Certified Licensed Locksmith' as awarded by ALOA SPAI
for specific states, state name typically can follow the initials
n.
one
that has a transponder that replicates another transponder code
n.
a
device that may be used to replicate an electronic copy of a
transponder
closed gated
adj.
pertaining to a lever tumbler whose gate is pierced into the
body of the tumbler. The lever(s) surround the fence in both the
locked and unlocked positions.
closed knob
n.
a knob without an opening in its face
closed
loop
n. a detection circuit where
discontinuity in a branch will result in a reportable condition
closer
size
adj. a numerical value related to
the applied force of a door closer, with a larger number being a
stronger force. Older closers were assigned alphabetic size
designations, where A was the smallest.
closet latch
n.
a latchset which has a turning device with minimum projection
in place of the inside knob or lever
closet spindle
n.
a spindle with a thumbturn attached to one end
closing
combinated
adj. pertaining to a lever lock
which is automatically combinated to the last key to extend the bolt
cloverleaf
cam
n. a style of mortise cylinder
cam with three lobes: a ball shaped longer center, and angular
projections on either side
clutch
n. 1. the part of a
profile cylinder which transfers rotational motion from the inside or
outside element to a common cam or actuator, 2. the feature of a lever
handle lockset which allows free movement of the lever when locked, 3.
the feature of a cylinder which allows turning the plug without
operation of the lock when a certain pressure is applied without the
correct key
abb.
the
title 'Certified Master Automotive Locksmith' as awarded by ALOA SPAI
abb.
the
title 'Certified Master Electronics Locksmith' as awarded by ALOA SPAI
CMIL
abb.
the
title "Certified Master Institutional Locksmith" as awarded by ILA
CMK
abb.
construction master key
CMK'd
abb.
construction master keyed
CML
abb. the title "Certified Master Locksmith" as awarded by ALOA SPAI
CMS
abb.
the title "Certified Master Safecracker" as awarded by NSO
CMST
abb.
the title "Certified Master Safe Technician" as awarded by
SAVTA
CO
abb.
certificate of occupancy
code
n. 1.
a designation assigned to a particular key combination for
reference when additional keys or cylinders may be needed. See also,
"blind code", "direct code", and "key symbol",
2. a standard
for Life Safety, structural integrity, fire safety, etc., either
incorporated into the statutes of a given jurisdiction, or a model
standard
code
key
n.
a key cut to a specific code rather than duplicated from a
pattern key. it may or may not conform to the lock manufacturer's
specifications
code original
key
n.
a code key which conforms to the lock manufacturer's
specifications
code
series
n.
an
ordered sequence of unique codes related to specific key combinations,
key sections and manufacturers
coercivity
adj. the measure (usually
expressed in Oersteds) of a magnetic material's resistance to being
recorded or erased. Magnetic stripe cards are either low coercivity or
high coercivity.
v.
the
process of pressing metal between two dies in order to form a raised
image and markings. Generally related to the bow of a key
comb attack
n. 1.
a pin tumbler defeat tactic using a series of straight pins
or teeth on a single tool, intended to push the pin stack past the
shear line, 2.
a defeat tactic used to force a spring cover off a pin
tumbler cylinder
combinate
v.
to set a combination in a lock, cylinder, or key
combination
n.
the group of numbers which represent the bitting of a key
and/or the tumblers of a lock or cylinder
combination
lock
n.
a lock which is operated by local input of a specific series
or sequence of numbers or letters
combination
wafer
n.
a type of disc tumbler used in certain binary type disc
tumbler key-in-knob looks. Its presence requires that a cut be made in
that position of the operating key(s)
combination
wheel
n.
a wheel type tumbler in a combination lock
compensate
drivers
v.
to select longer or shorter top pins, depending on the length
of the rest of the pin stack, in order to achieve a uniform pin stack
height
complementary
keyway
n.
usually a disc tumbler keyway used in master keying. It
accepts keys of different sections whose blades contact different
bearing surfaces of the tumblers.
composite
blank
n. a blank designed to enter
two or more simplex keyways
composite
keyway
n.
a keyway which has been enlarged to accept more than one key
section, often key sections of more than one manufacturer
compound
bitted key
n.
a key with at least one compound cut
compound cut
n.
a bitting which has another bitting dimension within its
dimensions
compound
lever
n. a lever tumbler that has two
or more distinct sweeps contacted by two or more different keys
concealed
key
control
n.
a
specification that all keys and the non-visible portion of all lock
cylinders be stamped with standard keying symbols
concealed
screw
rose
n. KIK or KIL trim that snaps
into place to hide mounting screws
concealed
shell
cylinder
n.
a specially constructed (usually mortise) cylinder. Only the
plug face is visible when the lock trim is in place
concealed
vertical
rod exit device
n.
a vertical rod exit device whose rods and header / threshold
bolts are concealed within the door
concrete case
n.
an enclosure for mounting a floor closer
configured
pin
n. a bottom pin which is
designed not to rotate along its long axis, often associated with
off-centerline chambers
constant
cut
n.
any bitting(s) which are identical in corresponding positions
from one key to another in a keying system. They usually serve to
group these keys together within a given level of keying, and/or link
them with keys of other levels. See also “rotating constant”
construction
breakout
key
n.
a key used by some manufacturers to render all construction
master keys permanently inoperative
construction
core
n.
an interchangeable or removable core designed for use during
the construction phase of a building. The cores are normally keyed
alike and, upon completion of construction, they are to be replaced by
the permanent system's cores.
construction
hole
n.
a
recess or pocket designed to receive ball bearings in lost-ball
keying. The size and/or shape of the recess is such that a pin tumbler
cannot enter it.
construction
master
key
n.
a key normally used by construction personnel for a temporary
period during building construction. It may be rendered permanently
inoperative without disassembling the cylinder.
construction
master
keyed
adj.
of or pertaining to a cylinder which is or is to be operated
temporarily by a construction master key
contact
area
n.
the gate area in a combination lock drive cam where the lever
nose does not contact the drive cam
contact
point
(s)
n. the area on each side of the
drive cam gate that the lever nose makes contact with. Most locks have
a left contact point and a right contact point.
contact
switch
n.
a
electrical, magnetic or mechanical device that triggers a circuit(s)
to open or closed depending on the application
contactless
smart
card
n. a card, conforming to the
physical characteristics specified in ISO 7813 & 10536, which
contains one or more integrated circuits and does not use contacts to
obtain power and allow interface to external equipment
continuous
duty
adj.
designed to sustain application of power for extended periods
n. the numeric value
of the thickness of the control sleeve expressed in increments
relative to the A2, A3 or A4 format being used
control
chamber
n.
in an interchangeable or removable core, any chamber which
has a control shear line, which is different from the operating shear
line
control cut
n.
any bitting which operates the retaining device of an
interchangeable or removable core
control
dimension
n.
in certain interchangeable or removable cores, the distance
between the operating shear line and the control shear line, expressed
either in units of the increment or as a measurement
control
key
n.
1. a key whose
only purpose is to remove and/or install an interchangeable or
removable core, 2.
a bypass key used to operate and/or reset some combination
type locks, 3.
a key which allows disassembly of some removable cylinder
locks
control
lug
n.
that part of an interchangeable or removable core-retaining
device which locks the core into its housing
control
number
n. a number used to calculate
the size of the build-up pin when; (a) the sizes of bottom and master
pins are known, or (b) the bitting depths of all operating keys are
known
control shear
line
n.
the shear line which allows operation of the control lug of
an interchangeable or removable core
control sleeve
n.
the part of an interchangeable or removable core retaining
device which surrounds the plug
controlled
cross
keying
n. a condition in which two or
more different keys of the same level of keying and under the same
higher level key(s) operate one cylinder by design; e.g., XAA1
operated by AA2 (but not XAA1 operated by AB1)
Note:
This condition could severely limit the security of the
cylinder and the maximum expansion of the system when (1) more than a
few of these different keys operate a cylinder, or (2) more than a few
differently cross keyed cylinders per system are required.
controller
n.
a
device that has decision making capability by way of authentication or
lookup in a database. It serves a control function by having output
relays or other interfaces with other devices which may include other
controllers, electric strikes, alarms, or printers.
convertible
dial
n.
a dial that is designed to readily accept a key locking core
at any time
coordinator
n.
in conjunction with a pair of doors, a device designed to
cause the inactive leaf to close first
core
n.
a complete unit, often with a “figure eight” shape, which
usually consists of the plug, shell, tumblers, springs, plug retainer
and spring cover(s). It is primarily used in removable and
interchangeable core cylinders and locks.
corner bracket
n.
a door closer mounting plate attached to the upper corner of
the jamb
covert
entry
n. the use of entry
or bypass techniques that can only be detected via disassembly and/or
detailed inspection of lock components
CPL
abb. the title "Certified Professional Locksmith" as awarded by ALOA SPAI
CPP
abb.
“Certified Protection Professional” as awarded by ASIS
CPS
abb.
the title "Certified Professional Safe Technician" as awarded
by SAVTA
crane
hinge
n.
a
three leaf hinge assembly with two of the leaves being mounted to the
body and door and the third only to the other two leaves
CRL
abb. the title "Certified Registered Locksmith" as awarded by ALOA SPAI
credential
n.
any
identifying or authorizing instrument, other than a mechanical key,
that can cause entry to be allowed
cremone
bolt
n. a surface mounted, top and
bottom locking, deadbolt mechanism operated by a central handle
cross‑bore
n.
a hole drilled into the face of a door where a bored or
interconnected lockset is to be installed
cross
keying
n.
the deliberate process of combinating a cylinder (usually in
a master key system) to two or more different keys which would not
normally be expected to operate it together. See also "controlled
cross keying” and “uncontrolled cross keying."
cruciform
adj.
of or pertaining to a key section or keyway which usually
resembles a plus sign (+) or the letter "X"
CSI
abb.
Construction Specifiers Institute
CTRL
abb. control key
cuff
n.
a sleeve mounted around a steering column to protect the
column
cup
escutcheon
n. lock trim that creates a
recess in a door face and does not protrude beyond the door face
cup
handle
n. a fitting recessed into a
door surface to provide a finger grip with which to move the door
cupboard
latch
n.
a latching mechanism typically surface mounted to the outside
of cabinet doors or drawers
curb
n.
a
round safe lock cover that is rabbeted and has a wheel post as an
integral part of its construction
curb
post
n.
a
wheel post attached to a curb
curtain
(British)
n. in a lever tumbler lock, a
device that blocks access to the keyhole when the key is turned
curved lip
strike
n.
a strike so shaped as to effect smoother function of the
latch while the door is closing
cut
v. to make cuts into a key
blade, see also “key cut(s)”
cut
angle
n.
a measurement, usually expressed in degrees, for the angle
between the two sides of a key cut, see also “degree of rotation”
cutaway
1.
adj. of or
pertaining to a device with material removed or a transparent cover to
expose and demonstrate a mechanism or feature,
2. n.
any cutaway product
cut edge
n.
the portion of the key blade which contains the cuts
cut key
n.
a key which has been bitted or combinated
cut root
n.
the bottom of a key cut
cut
root
shape
n.
the shape of the bottom of a key cut. It may have a flat or
radius of a specific dimension, or be a perfect "V"
cutter
n.
the part of a key machine which makes the cuts into the key
blank
cutter
guard
n.
a shield over a key machine cutter to protect the operator
CW
abb.
Clockwise,
as used in combination dialing instructions
cylinder
n.
a complete operating unit which usually consists of the plug
shell, tumblers, springs, plug retainer, a cam/tailpiece or other
actuating device, and all other necessary operating parts
cylinder blank
n.
a dummy cylinder which has a solid face and no operating
parts
cylinder clip
n.
a spring steel device used to secure some types of cylinders
cylinder
collar
n.
a plate or ring installed under the head of a cylinder to
improve appearance and/or security
cylinder guard
n.
a protective cylinder mounting device
cylinder key
n.
a broad generic term including virtually all keys for pin and
disc tumbler locks
cylinder
lock
n. any lock that is operated by
a cylinder key
cylindrical
lockset
n. a bored lockset whose latch or bolt locking mechanism is contained in the portion installed through the cross-bore
© A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
day gate
n.
a barrier used to restrict passage during normal business
hours, normally used at a vault entrance
day
key
n. 1.
the key for a day gate or day operation of a safe or vault
lock, 2.
a cash register key which does not allow audit or reset
functions, 3.
see 'change key'
daylock
1. n.
a locking device, other than the primary lock, used to
maintain the safe in a locked condition,
2. v.
to insecurely close a safe or vault door without scrambling
the combination, even though the door may not be opened by simply
turning or pulling the handle
dead
pin
n. an immovable pin in a
tubular lock which functions as a ward
deadbolt
n.
a bolt, which requires a deliberate action to extend, and
which resists end pressure in the unlocking direction when fully
extended
deadlock
n. a
lock which incorporates a deadbolt
deadlocked
adj.
the
state of a deadbolt when fully extended
deadlocking
adj.
pertaining to any feature which, when fully engaged, resists
attempts to move the latch or bolt in the unlocking direction through
direct pressure
deadlocking
latch
n.
a latchbolt with a deadlocking mechanism
declining
step
key
n.
a
key whose cuts are equal or deeper as you proceed from bow to tip
deco
key
finish
n. any design embossed or
imprinted on a key to give it an aesthetic appearance
decode
v.
to determine a key combination by physical measurement of a
key and/or cylinder parts
decoder gauge
n.
a measuring device which helps determine the combination of a
lock or cylinder without removing the tumblers
deflector
cover
n.
a
removable shield designed to prevent pin point drilling on a safe
degree
of
rotation
n.
a specification for the angle at which a cut is made into a
key blade as referenced from the perpendicular; e.g., right (R or 2),
left (L or 1) or center (= perpendicular) (C). This specification is
typically used for some high security keys.
delamination
v.
the process on older laminated door safes of having to remove
some layers of the lamination to allow access to the lock
delayed
action
timer
n.
a secondary device which prevents movement of a bolt or
boltworks until a set amount of time has elapsed. The device is
normally set or activated as part of the unlocking process.
n. an exit that will
not open until a preset amount of time after actuation has elapsed
department
master key
n.
a master key which operates all or most master keyed locks of
a given department
depth
key
set
n.
a set of keys used to make a code original key on a key
duplicating machine to a lock manufacturer's given set of key bitting
specifications. Each key is cut with the correct spacing to one depth
only in all bitting positions, with one key for each depth.
derived series
n.
a series of blind codes and bittings which are directly
related to those of another bitting list
detector lever
n. a lever tumbler with an
extra gate that, when elevated beyond the bolt fence, accepts a
latching fence to prevent further movement of the tumbler
detector lock
n. a lock that incorporates a
detector lever in its mechanism
detention
lock
n. a lock designed for securing
a cell or other area in a prison or jail
DHI
abb.
Door and Hardware Institute
dial
1. n.
the typically rotatable member of a combination lock that may
be used to differentiate locations on the combination wheels and cause
operation of the lock, 2. v.
the act of turning or rotating a dial
dial
insert
lock
n.
a
key operated cylinder used to lock the dial on a combination lock
dial
ring
n. an escutcheon for a
combination lock dial
dialer
n.
1. a device
which automatically places a telephone call to a pre-set number when
activated, 2.
an electro-mechanical device which systematically tries
different combinations on a dial operated combination lock
diamond back
adj.
pertaining to a rim cabinet lock whose mounting flanges and
case forms the general shape of a diamond
diamond
pick
n. a tumbler manipulation
device with a triangular protrusion at its tip
digital
dial
n. a rotatable dial that causes
a separate readable index, (typically digital), to change
digital
dialer
n. a telephone communication
device that dials a programmed telephone number, and transmits, via
tones or pulses, one or more signals to a digital receiver
dimple
n.
a key cut in a dimple key
dimple
key
n.
a key whose cuts are drilled or milled into its blade
surfaces. The cuts normally do not change the blade silhouette.
direct code
n. a designation assigned to a particular key which includes the actual combination of the key
direct entry (lock) – see straight tailpiece (lock)
n.
an
access control system which relies solely on information provided at
that time from the central computer to grant or deny access
direct
drive
adj.
of
or pertaining to a combination lock with the drive cam mounted on the
dial's spindle shaft
direction
of
rotation
n. the direction a combination
lock dial is to be turned when the combination is worked. It usually
is specified as clockwise (CW) or right (R), or counter clockwise
(CCW) or left (L).
n. 1. a flat tumbler which must be drawn into the cylinder plug by the
proper key so that none of its extremities extends into the shell 2. a
flat, usually rectangular tumbler with a gate which must be aligned
with a sidebar by the proper key
diskette
lock
n.
a usually key operated device which blocks access to the
drive for a removable disk
display
key
n.
a special change key in a hotel master key system which will
allow access to one designated guest room, even if the lock is in the
shut out mode. It may also act as a shut out key for that room.
n.
an
online access control system which is capable of maintaining
authorization data locally in case of communication delays or failure
divided
plug
keyway
n.
a
cylinder plug divided at the keyway into two parts. Either part may be
replaced to result in a different keyway combination via different
warding for the keyway
dog
1.
v. to place an
exit device in the holdback mode,
2. n.
in marine applications the latch for a hatch
dogging
cylinder
n.
a key operated cylinder used to dog an exit device
dogging
device
n. in an exit device, a
mechanism used to temporarily disable the latch from locking
dogging key
n.
a key or tool used to dog an exit device
dogging screw
n.
a screw used to dog an exit device
door
bumper
n. an obstruction installed to
prevent a door or lock from contacting another object
door
closer
n. a device designed to
regulate the closing of a door automatically by various means
door control
n.
any device which controls the opening, closing or position of
a door
door
holder
n.
any device designed to maintain a door in the open position
door
lug
n.
a
non-movable projection on a safe door that helps keep the door in the
locked position
door
puller
n. a tool designed to open a
safe deposit box by forcibly pulling the door and breaking the lock
door silencer
n.
a bumper installed in the jamb stop to quiet the closing of a
door
door
swing
adj.
the direction and degree to which a door opens, as LH 90º, RH
180º, etc.
door
viewer
n.
a device with one or more lenses, mounted in a door at eye
level, which allows a limited view through a door
double-acting
closer
n.
a door closer designed to be used on a double-acting door
double-acting
door
adj. a door that may be pushed
open from either side
double-acting
hinge.
n.
a hinge which permits movement of a door in either direction
from the closed position
double-acting
lever tumbler
n.
one that must be lifted a precise amount, neither too little
nor too much to allow movement of a bolt
double
bitted
key
n. a key typically bitted on
two opposite surfaces
double
cut
1. n.
two bittings for the same tumbler position,
2. adj.
see "double bitted key"
double
cylinder
adj.
pertaining to a lock with two keyed cylinders
double
cylinder deadlock
n.
a deadbolt lock whose bolt may be operated by a key from
either side
double‑D
1.
n. a shape
consisting of two opposing arcs and two opposing flats,
2. adj.
Having such a shape.
double‑D punch
n.
a tool used to make a double‑D hole
double
horn
adj.
of or pertaining to a safe deposit type lock which requires
two separate holes through the door
double locking
adj. of or pertaining to a lock
with one or more bolts with different functions, typically a latch and
a deadbolt
double pin
v.
to place more than one master pin in a single pin chamber
double
throw
bolt
n. a deadbolt that has two
distinct extended positions, both of which are deadlocked
drawback
latch/lock
n. a latch/lock whose latch is
disengaged by pushing or pulling an actuator toward the hinge side of
the jamb
draw
sheet
n. a page with a completed
matrix of potential combinations used in Matrix Format Master Keying
drill
point
n. the exact measurement of the
location used to drill a locked up container to effect an opening
drive
cam
n. the first wheel rotated by a
dial or key that has an opening designed to allow the fence, lever, or
tailbar to enter and facilitate in opening of the lock or safe
drive‑in
adj.
pertaining to a latch or bolt with a round face
drive pin
n.
a protrusion on or through a drive cam or tumbler which drives or
turns the next tumbler in a combination safe lock
driver spring
n.
a spring placed on top of the pin stack to exert pressure on
the pin tumblers
drop
n.
a pivoting or swinging dust cover, see also “increment”
drop bolt
n.
a lock with an interlocking bolt which moves vertically and
may enter loops on the strike
drop
in
n. the gate area of the drive
cam where the lever nose drops into. Usually identified with a
corresponding number on the dial
drop-in
point
n. the location in a
combination lock where the wheel gates are aligned with the fence
drop
ring
n. a looped handle which can
pivot, typically recessed and falls flush with the door face when not
in use
dual
custody
1.
n. a function
designed to require the presence of two persons with two different
keys, combinations or codes to operate the same device,
2. adj.
Pertaining to such a function
dual
locking
cylinder
n. a style of lock cylinder
whose key operates two independent locking mechanisms within the
cylinder
dumbbell
pin
n.
a
spool pin with serrations at the larger diameter ends
dumb
card
n.
an
authorization credential that presents recorded data only
dumb
reader
n.
an
access control interrogation device that can only relay data to a
controller
dummy
adj. pertaining to any type of
non-active device applied for aesthetic purposes
dummy cylinder
n.
a non-functional facsimile of a rim or mortise cylinder used
for appearance only, usually to conceal a cylinder hole
dummy trim
n.
non‑active trim applied for aesthetic purposes
duplex
n. 1. an early trade name used by Yale for: mortise
locks with two pin tumbler cylinders on the same side of the lock,
lever tumbler mortise locks with two keyways on the same side of the
lock, to accomplish a master keying effect, 2. an early trade name
used by Sargent for a master ring cylinder 3. a key machine which has
two sets of carriages and cutters in effect creating two separate
machines in one
duplicate
v.
to copy, see also “duplicate key”
duplicate key
n.
any key reproduced from a pattern key
duress code
n.
a special combination or operation sequence which conveys an
alarm or other signal to a remote location while allowing access
dust box
n.
an enclosure applied under a strike to enhance appearance and/or performance
dust cover
n.
a device designed to prevent foreign matter from entering a
mechanism through the keyway
dust
proof
cylinder
n.
a cylinder designed to prevent foreign matter from entering
either end of the keyway
dust proof
strike
n. a typically floor mounted
strike that has a spring loaded internal plunger designed to keep the
receptacle free of dust and debris
Dutch
door
bolt
n. a bolt which secures the top
section of a Dutch door to the bottom section
EAC
abb. electronic access control
abb.
Electronic
Control Module
edge‑bore
n. a hole
drilled into the edge of a door where a bored or interconnected
lockset is to be installed
edge cut key
n. a cylinder key which has the bitting
created by different elevations that are cut completely through the
blade thickness
edge
pull
n.
a
handle mounted on, or in, the edge of a sliding or pocket door for
gripping to pull the door closed
educational
occupancy
n.
those buildings or areas which are designated as places for
education purposes according to life safety or building codes
effective plug
diameter
n.
The dimension obtained by adding the root depth of a key cut
to the length of its corresponding
bottom pin which establishes a perfect shear line. This will
not necessarily be the same as the actual plug diameter.
effective
throw
n.
the distance a deadlatch remains projected when the guard
bolt has been engaged and end pressure is applied to the latch
EIA
abb. Electronics Industry
Association
ejector
hole
n.
a hole found on the bottom of certain interchangeable cores
under each pin chamber. It provides a path for the ejector pin.
ejector pin
n.
a tool used to drive all the elements of a pin chamber out of
certain interchangeable cores
n. burglar resistive
chest with door thickness at least 1 1/2" steel and wall thickness at
least 1" steel
elbow
catch
n.
an "L" shaped latching mechanism typically mounted to the
inside of the inactive leaf of a pair of cabinet doors
electric
strike
n. an electro-mechanical
strike, which secures or releases the latch via applied current
electrified
lockset
n.
a lock which is controlled electrically
electronic
access
control
n.
access
control that uses electricity
emergency
code
n. in an electronic lock, a
factory-set or user-set code or combination that will open the lock a
predetermined number of times
n.
an
automobile computer that controls all electronic functions of the
vehicle
emergency
escape
mechanism
n.
an
exit device for a vault
emergency key
n.
the key which operates a privacy function lockset
Emergency
Master
Key
n.
a special master key which usually operates all guestroom
locks in a hotel master key system at all times, even in the shut out
mode. This key may also act as a shut out key.
EMK
abb.
emergency master key
end
cap
n. the cover typically used on
the hinge side edge of many touch bar exit devices
end ward
n.
a ward which prevents complete insertion and/or rotation of
an incorrect key by forming an obstruction to the end of the key
end ward cut
n.
any cut made into a key to bypass an end ward
ENG
abb.
engineer's key
engineer's
key
n.
a selective master key which is used by maintenance personnel
to operate many locks under different master keys in a system of three
or more levels of keying
entrapment
key
n.
a key designed to be captured by a cylinder after insertion
entry/exit
delay
n.
an alarm or access control feature which allows a specific
time lapse between the activation of a switch and the activation of a
secondary component
ERD
abb. external relocking device
n. burglar resistive
safe or chest bearing the following label. "Underwriters'
Laboratories, Inc. Inspected tool resisting Safe TL-15 Burglary"
escapement
n.
one of the components of a timelock which comprises the
escape wheel, escapement lever, corresponding pivot (hole) jewels,
bridge(s) and platform (base)
escutcheon
n.
a surface mounted trim which enhances the appearance and/or
security of a lock installation
espagnolette
n.
a
top and bottom locking system with hooks at either end which rotate to
draw a door or window fully closed
exit
alarm
n. an annunciator that signals
the opening of an exit door
exit
device
n. a door lock/latch mechanism
which releases in the direction of exit travel via a bar or panel
extending across the major width of the door
exit
door
n. 1.
a door which has no provision for ingress,
2. a door which
fills some or all the code requirement for safe egress of the occupant
load from a building or portion of a building
exit only
adj.
refers to hardware designed to secure an opening in such a
way as to permit exit at all times but prevent entry at all times
exit
travel,
direction of
n.
the
way occupants are expected to move to get out of a building or a
portion of a building
n. 1. a specification
for the minimum door opening, (side to side), that requires
application of an exit device, 2. an expression of an actual opening
dimension
expansion
specification
n. a requirement for bittings
to be planned beyond the immediate needs of a keying system
exploratory
cut
n. a cut made during
impressioning to stop a tumbler from marking
extended
lip
strike
n.
a
strike with a (usually curved) leading edge that protrudes to or
beyond the edge of the jamb
extension
flush
bolt
n. a flush bolt that has a
separate escutcheon and faceplate
extension
link
n. a device which is used to
extend the backset of a spring latch or dead latch
External
Relocking
Device
n. a device outside the lock
case that prevents the safe door from being opened after attack, two
types are typically used, active and passive
extractor key
n. a tool which normally removes a portion of a two-piece key or blocking device from a keyway
© A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
F rated
Burglary Chest
n. a burglary
resistive safe or chest bearing a TL-30 torch or tool resistance or a
inspected explosive resisting safe with relocking device X-60 burglary
rating
face
n.
the finished component of a lock visible on the edge of a
door
face
cap
n.
a finished cover, that may retain a dust cover or serve as a
plug retainer, affixed to the face of some lock cylinders
face plate
n.
the finished, removable plate which covers the front of some
locks
factory
original key
n.
the out key furnished by the lock manufacturer for a lock or
cylinder
fail-safe
adj.:
a feature of a security device designed to release, for
safety purposes, during a power loss
False
Acceptance
rRate
n.
in
a biometric access control device, the number of incorrect submissions
that can be accepted as correct, typically expressed as per cent, e.g.
less than 0.0001%
false
gate
n. a gate in a part of the
operating mechanism, which is not formed deeply enough to allow
operation of the lock
False
Rejection
Rate
n. in a biometric access control device, the number of correct submissions that can be rejected as incorrect, typically expressed as per cent, e.g. less than 0.001%
false set
n. when a tumbler incorrectly indicates a shear line
during picking
FAR
abb.
false
acceptance rate
feather
key
n.
a
type of flat key used for the original Yale pin tumbler mortise locks
fence
n.
1. a projection
on a lock bolt which prevents movement of the bolt unless it can enter
gates of properly aligned tumblers,
2. any locking
element other than a sidebar or shackle designed to enter a tumbler's
gate, 3.
a projection on the lever in a combination lock that prevents
the lever from engaging the drive cam until the proper combination is
entered, see also "sidebar"
file cabinet
lock
n.
1. any lock used
on a file cabinet, 2. a plunger lock cylinder for
a gang lock normally used in a file cabinet
fill
program
n.
a
computer based code reference which determines all combinations in a
code series that match a given partial combination
filler
plate
n.
a
usually flat piece of material used to; cover a hole or opening,
provide a foundation for mounting additional hardware, or adjust the
position of hardware as mounted
fine
ward
n.
a ward made of sheet metal, typically installed as a bridge
ward
finish
n.
a material, coloring and/or texturing specification
fire alarm
n.
a system designed to detect and report conditions, which may
indicate presence of a fire
fire door
n.
a door constructed to provide a specific degree of fire
protection
fire door
assembly
n.
any combination of a fire door, frame, hardware and other
accessories, that together provides a specific degree of fire
protection to the opening
fire exit
hardware
n.
exit devices, which may legally be installed, on fire doors. Distinguished from other
exit devices because it: 1. is labeled for both fire and
panic and; 2.
has no means of locking the latch in a retracted position
fire
separation
n.
construction
designed to limit the spread of fire in a structure
fireman’s key
n.
a key used to override normal operation of elevators,
bringing them to the ground floor
first
generation
duplicate
n.
a key which was duplicated using a factory original key or a
code original key as a pattern
first key
n.
any key produced without the use of a pattern key
five
column
progression
n.
a process wherein key bittings are obtained by using the cut
possibilities in five columns of the key bitting array
five pin
master key
n.
a master key for all combinations obtained by progressing
five bitting positions
fixed
fly
n. in a combination lock, a fly
that does not move relative to the wheel it is on
fixed
pin
hand change wheel
n.
a
combination wheel that uses pressed or threaded pins as a fixed fly
fixed rise
(chamber)
n. a plug and shell pin chamber
design associated with fixed rise pins
fixed rise
(pin)
adj. of or pertaining to a pin
tumbler which is designed to operate properly only when its rotation
capabilities are limited or precluded
fixed tumbler
n. a ward located within the
tumbler pack
v.
to
program an ECM
flat goods
n.
ancillary architectural hardware such as push plates, mop
plates, stretcher plates, kick plates, etc.
flat steel key
n. a flat type key made of
steel
flat type key
n.
a key which is completely flat on both sides, usually used
for warded or lever tumbler locks
flexible
head
mortise cylinder
n.
an adjustable mortise cylinder which can be extended against
spring pressure to a slightly longer length
floor
closer
n.
a
door closer installed below the door at the floor surface, generally
also acting as a bottom pivot for the door
floor
master
key
n.
a master key which operates all or most master keyed locks on
a particular floor of a building
floor
safe
n.
a security container designed for mounting below floor level
with the top surface flush with the finished floor
flush
bolt
n.
a non-keyed deadbolt, with a one piece escutcheon/faceplate,
typically mounted flush to door surfaces
flush cup pull
n. a flush pull with a circular
cross-section
flush pull
n. a recess in a door or drawer
which serves as a handle or grip
flush ring
n. a ring, recessed into a
door, which swings out to serve as a handle
n. a key for a lever lock with a section that is
wider in the middle than on the edges
fly
n. the part of a combination
wheel pack or a drive cam that makes contact with a similar part on an
adjacent wheel in the wheel pack and causes it to turn
fly
stop
n. the part of a combination
lock wheel that restricts the motion of a movable fly
n.
an
object or remote, other than a key, which attaches to a key ring, key
or key chain
n.
a
vehicle remote with an attached key blade, and/or other electronic
features, which allows the user to start the engine and drive the
vehicle
n. a key with
multiple sections that pivot to make it more compact
foot
n.
the cam portion of the trunnion assembly in some lever
tumbler locks
foot
bolt
n.
a
bolt mechanism typically mounted at the bottom of a door, and designed
to be easily operated by ones foot
forbidden
zone
n. on a combination lock dial,
a range of marks within which the last item of the combination must
not be set to provide for proper lock operation
forced
entry
n. entry or bypass
techniques which leave obvious damage to the lock or enclosure
fork
lock
n. a motorcycle or bicycle lock
which prevents the front fork from rotating
four
column
progression
n.
a process wherein key bittings are obtained by using the cut
possibilities in four columns of the key bitting array
four pin
master key
n.
a master key for all combinations obtained by progressing
four bitting positions
frangible
shackle
n. a
padlock shackle designed to be broken easily
frangible
shackle padlock
n.
a padlock equipped with an easily broken shackle
frangible
tumbler
n. a tumbler whose reference
size may be permanently altered, or established, mechanically without
removal from the cylinder
French
doors
n.
a
set of double doors composed of many small glass panes and narrow
stiles
friction
catch
n. a door or cabinet latching
device which contains no actuator and is released by applying a
measure of force in the opening direction
friction fence
n.
a
pivoting combination lock fence that is usually mounted loosely to a
rotatable member that positions the fence to test the cam and wheels
for alignment at drop in when the rotatable member is turned in the
correct direction
friction
hinge
n.
a
device with torque resistance between two parts on a common axis
frictioned
plug
n.
a
type of clutch system permitting both sides of a double profile
cylinder to operate the lock regardless of whether the opposite plug
is turned
front
n.
the portion of a lock which provides the means of mounting
the locking device to the edge of the door
front
drive
adj.
of
or pertaining to a combination lock with the drive cam located between
the dial and the wheel pack
front
reading
(dial)
adj.
a safe dial that has graduations on the face
FRR
abb. false rejection rate
FSIC
- abb. Full Size Interchangewbale Core; see also LFIC
full
lip
strike
n.
a strike plate for a latch with the lip extending the full
height of the strike
full mortise
adj.
pertaining to a method of installation in which only the
faceplate and trim is exposed. The lock case is installed in a pocket
in the door or drawer v. to make a rectangular
pocket in a door or drawer that is only open on the edge of the door
or drawer
full
mortise
hinge
n.
a
type of hinge designed for mortising into the edge of the door and
into the rabbet of a door frame
function
n.
a set of operating features for a particular type of lock or
exit device which make it suitable for a specific application. The
function is designated by a classification name or standards reference
number. See ANSI or BHMA for a specific listing.
fusible
link
n.
a relock trigger activated by heat
fusible link
arm
n. a door closer arm which includes a mechanism for holding a door open. This mechanism has an element which, when subjected to certain temperatures, melts and allows the door to close
© A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
v. a transfer of
material from one surface to another as a result of friction
gang lock
n.
a locking mechanism with multiple bolts which locks different
openings simultaneously by a single action
garage door
lock
n.
a rim lock mechanism designed for use on an overhead door,
which mechanism has a spring loaded bolt which automatically locks the
door's bolt mechanism
gate
n.
a notch cut into the edge of a tumbler to accept a fence or
sidebar
n. a component to prevent the fence from entering the
combination wheel gate while changing a combination on a zero change
lock
geographical
exclusivity
n. a feature, offered by some
manufacturers, of distributing keyways and/or combinations for locks
to ensure uniqueness in a geographic location
GGGMK
abb.
great great grand master key
GGGMK'D
abb.
great great grand master keyed
GGM
abb.
great grand master key
GGMK
abb.
great grand master key
GGMK'D
abb.
great grand master keyed
glass
relocker
n.
a device employing a frangible plate intended to permanently
incapacitate a security container's normal opening mechanism if
activated by physical attack on the container
GM
abb.
grand master key
GMK
abb.
grand master key
GMK section
abb. grand master key section
GMK'D
abb.
grand master keyed
graduated
drivers
n.
a set of top pins of different lengths.
Usage is based on the height of the rest of the pin stack, in
order to achieve a uniform pin stack height.
See also “compensate drivers”
Grand
Master
Key
n.
the key which operates two or more separate groups of locks,
which are each operated by a different master key
grand master
key system
n.
a master key system which has exactly three levels of keying
Grand
Master
Keyed
adj.
of or pertaining to a lock or cylinder which is or is to be
keyed into a grand master key system
graphite gun
n.
a usually flexible container designed to dispense a powdered
lubricant
gravity
pivot
hinge
n. a hinge with complimentary
sloped or V shaped knuckles on each leaf that cause gravity to turn
the door back to the closed position
Great
Grand
Master Key
n.
the key which operates two or more separate groups of locks
which are each operated by a different grand master key
great grand
master key system
n.
a master key system which has exactly four levels of keying
Great
Grand
Master Keyed
adj.
of or pertaining to a lock or cylinder which is or is to be
keyed into a great grand master key system
Great
Great
Grand Master Key
n.
the key which operates two or more separate groups of locks
which are each operated by different great grand master keys
great great
grand master key system
n.
a master key system which has five or more levels of keying
Great
Great
Grand Master Keyed
adj.
of or pertaining to a lock or cylinder which is or is to be
keyed into a great great grand master key system
n.
a
matrix based layout for organizing access points and their
corresponding access needs, used primarily in master keying and access
control
grip
n.
the knob, lever, thumbpiece, push-pull operator, etc. of any
working trim
group
1
n. a UL rating given to a
mechanical combination lock able to withstand 20 man-hours of expert
manipulation as well as other specifications listed in UL 768
group
1R
n. a UL rating
given to a mechanical combination lock equal to a group 1 lock which
has the added feature of being X-Ray resistant, and which meets other
requirements listed in UL publication 768
group
2
n. a UL rating given to a
mechanical combination lock able to withstand reasonable expert
manipulation as well as other specifications listed in UL 768
group
2M
n. a UL rating given to a
mechanical combination lock able to withstand 2 man-hours of expert
manipulation as well as other specifications listed in UL 768
GSA
abb.
General Services Administration (US Government)
GSA
Class
1
n.
a GSA approved container meeting Federal Specification
AA-F-357(canceled) with entry protection consisting of 10 Man-Minutes
forced entry, 30 Man-Minutes surreptitious entry and 1 hour fire
rating
GSA
Class
2
n.
a GSA approved container meeting Federal Specification
AA-F-357(canceled) with entry protection consisting of 5 Man-Minutes
forced entry, 20 Man-Minutes surreptitious entry and 1 hour fire
rating
GSA
Class
3
n.
a GSA approved uninsulated container meeting Federal
Specification AA-F-358 with entry protection consisting of 20
Man-Minutes surreptitious entry
GSA
Class
4
n.
a GSA approved uninsulated container meeting Federal
Specification AA-F-358 with entry protection consisting of 5
Man-Minutes forced entry, 20 Man-Minutes surreptitious entry
GSA
Class
5
n.
a GSA approved uninsulated container meeting Federal
Specification AA-F-358 with entry protection consisting of 10
Man-Minutes forced entry, 20 Man-Hours surreptitious entry and 30
Man-Minutes Covert entry
GSA
Class
6
n.
a GSA approved uninsulated container meeting Federal
Specification AA-F-358 with entry protection consisting of 20
Man-Hours surreptitious entry and 30 Man-Minutes covert entry
GSA
Class
7
n.
a GSA approved uninsulated container meeting Federal
Specification AA-F-2815(canceled) with entry protection consisting of
20 Man-Hours surreptitious entry and 15 Man-Minutes covert entry
GSA
container
n.
any container approved by the General Services Administration
for storage of classified material
GSA
weapons
container
n. a GSA vault or map and plan
container used to store weapons and requiring a minimum protection of
a Group 1 lock
guard bolt
n.
a spring loaded bolt which, when activated, will deadlock a latch bolt
guard
filler
n.
a
spacer used in place of a lever in the guard lever pack of a safe
deposit lock
guard
key
n.
a key which must be used in conjunction with a renter's key
to unlock a safe deposit lock. it is usually the same for every lock
within an installation.
guard
lever
n.
any
lever tumbler, in a safe deposit lock, intended to be operated by the
guard key
guard
post
n.
1.
the circular member in a safe deposit lock upon which the guard levers
are mounted , 2. (sic) the trunnion for the guard key in a safe
deposit lock
guard
tumbler
n.
any
tumbler installed in a safe deposit lock for the guard key to activate
guest
key
n.
a key in a hotel master key system which is normally used to
unlock only the one guest room for which it was intended, but will not
operate the lock in the shut out mode
guide
n. 1. that part of a key machine which follows the cuts of a pattern key or template during duplication, 2. that part of a flat key lever lock which connects the nose to the foot and supports the key blade
© A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
half
moon
cut
n.
a
semi-circular cut in the bolt throw bit of a key, with the cut axis
running parallel to the key shaft. Found typically on a key for a high
security lever safe lock.
half
mortise
1. adj.
pertaining to an installation prep that typically leaves the
bolt face plate and a perpendicular surface of the lock visible, with
visible surfaces being flush mounted,
2. v.
to make a cavity in a door or drawer that is open on the edge
and on one side of the door or drawer,
3. adj.
pertaining to a locking device designed to fit in a half
mortise prep
half‑mortise
hinge
n.
a hinge which has one leaf mortised into the door and the
second leaf applied to the surface of the frame
half-surface
hinge
n.
a hinge which has one leaf mounted onto a face of the door
and the second leaf mortised into the frame
hand change
adj.
pertaining to a combination lock in which the wheels must be
removed in order to change the combination
handed
adj.
pertaining to hardware which is manufactured only for
application on doors with a specific orientation
handicapped
code
n.
any building code designed to ease access for handicapped
persons
handleset
n.
a
complete lock or latch assembly which incorporates a pitcher handle
hang
(rake
& hang)
see
'false set'
hardened
core
(pin)
adj. a bottom or top pin which is
bimetallic, the central portion of which being hardened metal intended
to resist drill attack
hardplate
n. a tempered barrier placed
between the lock and the outside of a safe to inhibit drilling
hard
wire
system
n.
a
system which uses metallic conductors to connect the various sensors
to the central processor
hardware
key
n.
a computer hardware component which protects copyrights by
preventing software from running on any computer where the key is not
installed. The key is typically accessed via one of the ports.
hardware
schedule
n.
a listing of the door hardware used on a particular job it
includes the types of hardware, manufacturers, locations, finishes,
and sizes. It should include a keying schedule specifying how each
locking device is to be keyed.
hasp
n.
a hinged metal strap designed to be passed over a staple and
secured in place
header
n. the horizontal, top, member
of a door jamb
heel & toe
locking
n.
describes a padlock which has locking dogs at both the heel
and toe of the shackle
heel (of a
padlock shackle)
n.
the part of a padlock shackle which is retained in the case
when in the unlocked position
height
adjustment
screw
n.
a screw contained within the hinge block of a safe that
raises or lowers the door to clear the frame
helmet
lock
n.
auxiliary lock on motorcycles used to secure a helmet
HGM
abb.
horizontal group master key
HiCo
abb. high coercivity
high
coercivity
adj. a high energy form of
magnetic encoding measuring in the range of 2400 to 4000 Oe which is
resistant to accidental erasure
high
security
cylinder
n.
a
cylinder which offers a greater degree of resistance to any two or
more of the following: picking, impressioning, key duplication,
drilling or other forms of forcible entry
high security
key
n.
a key for a high security cylinder
hinge security
stud
n.
a protrusion on one leaf of a hinge which interlocks with the
other when the door is closed
hinge stile
n.
the vertical edge of a door where hinges are installed
hinged shackle
n.
a shackle whose heel is permanently mounted to the padlock
case in a manner which allows the shackle to pivot to open
HKP
abb.
housekeeper's key
Hobbs shackle
n.
a hinged shackle with a notch for the bolt in its movable end
hold
open
n.
1.
a function of self latching hardware which allows a lock to be set in
a non-latching mode 2. A function of a door closer, or separate
hardware device, which allows the door to be retained in an open
position
hold open arm
n.
a door closer arm with the capability of maintaining the door
in the open position
hold
open
cylinder
n.
a cylinder provided with a special cam which will hold a
latch bolt in the retracted position when so set by the key
holdback
n.
a
function of some self latching locks which allows selective retention
of the bolt to prevent latching when the door is closed
holding
fixture
n.
a device which holds cylinder plugs, cylinders, housings,
and/or cores to facilitate the installation of tumblers, springs
and/or spring covers
hole
change
(wheel)
n.
a perforated tumbler that may have its combination set by
placement of a fly relative to, or in, one of the perforations
hollow
core
door
n.
a
non-metal door with structural reinforcement creating air pockets
between the two faces
hollow
driver
n.
a top pin hollowed out on one end to receive the spring,
typically used in cylinders with extremely limited clearance in the
pin chambers
hollow
metal
door
n.
typically
a door made of sheet metal on all surfaces and lightly reinforced to
make it rigid
hook
n.
a vertical surface at the top of a cut angle that prevents
smooth insertion or withdrawal of a key
hook bolt
n.
a lock bolt shaped in the general outline of a hook.
Normally used on sliding doors or where spreading of the
frame and door is a possible attack.
hook pick
n. a pick with a tip that
curves upward by 45º or more toward perpendicular to the blade
hook
ward
n. a ward that has an offset
requiring an 'L' shaped cut in the key
horizontal
exit
n.
an exit to the outside or an area of refuge on the same or
nearly the same level
Horizontal
Group
Master key
n.
the two pin master key for all combinations listed in all
blocks in a line across the page in the standard progression format
horizontal
locking
n.
the locking mechanism associated with vehicle doors with
horizontal linkage
horn
n.
in a non‑cylinder lock, the housing which surrounds the nose
and extends through the door or drawer
horn plate
n.
the cover of a lever tumbler lock case to which the horn is
attached
hospital hinge
n.
a hinge with a large chamfer at each end of the knuckle
hotel
cylinder
n. a cylinder which can
function to prevent the operation of all keys except emergency,
display and some shut out keys. It may also contain an indicator.
housekeeper's
key
n.
a selective master key in a hotel master key system which may
operate all guest and linen rooms and other housekeeping areas
housing
n.
that part of a locking device which is designed to hold a
core
HP
abb. hardplate
hub
n.
1. a lock
component, which redirects rotational motion from a spindle or shaft
to linear movement of a latch or bolt,
2. (key change),
the part of a combination wheel that the change key engages to permit
the combination to be changed
hybrid key
n. a key that can operate locks
using two or more different technologies in one device, e.g.
mechanical/electronic, mechanical/magnetic, etc.
hybrid locking
system
n. a locking system which derives its security from two or more different technologies operated by the same key in one device, e.g. mechanical/electronic, mechanical/magnetic, etc.
© A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
IC
abb.
interchangeable core
ICBO
abb.
International Conference of Building Officials
abb. the title 'Institutional Certified Master Locksmith' as awarded by ALOA SPAI
abb. the title 'Institutional Certified Professional Locksmith' as awarded by ALOA SPAI
abb.
the
title 'Institutional Certified Registered Locksmith' as awarded by
ALOA SPAI
ignition key
release
n.
a button or other actuator which must be pushed before a
vehicle's ignition key may be turned to the withdrawal position
ignition lock
n.
the lock assembly associated with a vehicle's engine on‑off
switch and starter
ignition
puller
n.
a tool for removing an ignition cylinder by pulling outward
on it
ILA
abb.
Institutional
Locksmiths Association
ILCP
abb.
“Institutional
Locksmith Certification Program”; a locksmith certification program
administered by ILA
n.
an
anti-theft device in an automobile, which prevents starting or driving
the vehicle unless an appropriate electronic credential is present
impression
n.
1. the mark made
by a tumbler on its key cut , 2. v.
to fit a key by the impression technique
impression
technique
n.
a means of fitting a key directly to a locked cylinder by
manipulating a blank in the keyway and cutting the blank where the
tumblers have made marks
impressioning
tool
n. 1.
a tool designed to hold a key blank while making a key by the
impression method, 2. a tool which fits into a
keyway and holds a material that accepts impression marks easily
inactive
case
n.
the
exit device case mounted on the stile opposite the lock stile
inactive
door
n. the door of a pair, which is
secondary in usage and is normally locked by surface or flush bolts
incidental key
n. a key whose combination
unintentionally operates a cylinder that has had master pins added to
two or more chambers
incidental
master
key
n. a key combination which operates a cylinder combinated to two or more
keys from different levels in a master key system
increment
n.
a usually uniform increase or decrease in the successive
depths of a key cut which must be matched by a corresponding change in
the tumblers
independent
custody
1.
n.
a function of a locking mechanism that allows separate access by
either of two different people, each with a different type method of
opening and closing the lock, 2. adj. pertaining to such a function
index (of a
combination lock dial)
n.
the mark outside the dial ring of a combination lock used as
a reference point
indicator
n.
a device which provides visual evidence that a deadbolt is
extended or that a lock is in the shut out mode
individual
key
n.
an operating key for a lock or cylinder which is not part of
a keying system, see also “change key” #1
inner
ring
n.
that
part of a mesh change or key change combination wheel that makes
direct contact with the wheel post
n. a component in some manipulation-resistant safe
locks that connects the knob with the drive cam to open the gate in
the drive cam
integral
lockset
n. a lockset that combines two
or more different mounting or operational methods, typically
key-in-knob and mortise
n.
a
remote head fob key that contains a transponder
interchangeable
core
n.
a key removable core which can be used in all or most of the
core manufacturer's product line. No tools (other than the control
key) are required for removal of the core.
interconnected
lockset
n.
a lockset whose trim provides a means of simultaneous
retraction of two or more bolts which may also be operated
independently
interlocking
bolt
n.
a bolt which interlocks with its strike when fully engaged
interlocking
pin
tumbler
n.
a type of pin tumbler which is designed to be linked together
with all other tumblers in its chamber when the cylinder plug is in
the locked position
intermittent
duty
adj.
of or pertaining to an electric strike or lock not designed
to be energized for extended periods of time
Internal
Relocking
Device
n. a device inside a safe lock
case that prevents the lock bolt from being retracted after
attack
IP
abb.
internet
protocol
IR
abb.
Infrared
IRD
abb. internal relocking device
© A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
jackscrew
n. a threaded rod used for
centering and balancing a vault door & frame in position during
installation
jamb
n.
the vertical components of a door frame
jiggered
finish
n. a surface adorned with
overlapping concentric circles
jimmy proof
adj.
pertaining to a lock having a bolt which interlocks with its
strike
JIS
abb. Japanese Industrial Standard
jumbo cylinder
n. a rim or mortise cylinder of 1-1/2” diameter
© A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
K
sym.
symbol for "keys" used after a numerical designation of the
quantity of the keys requested to be supplied with the cylinders;
e.g., lk, 2k, 3k, etc. it is usually found in hardware/keying
schedules.
KA
abb.
keyed alike
KA1,
KA2,
etc.
sym.
symbol which indicates that all cylinders so designated are
or are to be operated by the same key(s). The numerical designation
indicates the keyed alike group or set.
KA/2,
KA/3,
etc.
sym.
symbol used to indicate the quantity of locks or cylinders in
keyed alike groups. These groups are usually formed from a larger
quantity; e.g., 30 cylinders KA/2.
Kalamein
door
n.
a
metal clad door that has a wood filler
KBA
abb.
key bitting array
KBA
order
n. the arrangement of
potential key cuts within each chamber position of the key bitting
array, e.g. odometer, top-down or randomized
KD
abb.
keyed different
keeper
n.
the movable portion of an electric strike which captures the
bolt, see also "strike"
key
n.
a properly combinated device which is, or most closely
resembles, the device specifically intended by the lock manufacturer
to operate the corresponding lock
Key
Bitting
Array
n.
a matrix (graphic) display of all possible bittings for
change keys and master keys as related to the top master key
key
bitting
punch
n.
a manually operated device which stamps or punches the cuts
into the key blade, rather than grinding or milling them
key
bitting
specifications
n.
pl. the
technical data required to bit a given (family of) key blank(s) to the
lock manufacturer's dimensions
key
blank
n.
any
material manufactured to the proper size and configuration which
allows entry into the keyway of a specific locking device and may then
be bitted to become an operating key for the device
key cabinet
n. a cabinet with hooks,
velcro, or other means designed to store keys systematically
key caliper
n. an outside caliper
specifically made with an anvil of size and shape to measure the root
depth of bittings
key
casting
kit
n. a collection of mold, filler
and equipment which permits duplication of a key through the
production of a soft metal temporary likeness
key change
adj.
referring to a lock in which the combination can be changed
through the use of a special key or tool without disassembling the
lock
n.
the
number of different combinations available to use as individual keys
for a particular cylinder/lock
key
change
wheel
n. a safe lock component that
may have the orientation of its gate altered via a special key and
process
key
changeable
adj.
of or pertaining to a lock or cylinder which can be
recombinated without disassembly, by the use of a key. The use of a
tool may also be required.
key
check
n.
a small identification tag on which characters are imprinted,
typically attached to a key by a ring
key
clamp
n. 1.
a part on some types of clippers that secures the key,
2. see key vise
key
coding
machine
n.
a key machine designed for the production of code keys. It
may or may not also serve as a duplicating machine.
key
control
n.
1. any method or
procedure which limits unauthorized acquisition of a key and/or
controls distribution of authorized keys,
2. a systematic
organization of keys and key records
key cut(s)
n.
the portion of the key blade which remains after being cut
and which aligns the tumbler(s)
key cut
profile
n.
the shape of a key cut, including the cut angle and the out
root shape
key
duplicating machine
n.
a key machine which is designed to make copies from a pattern
key
key
extractor
n. a tool designed for use to
remove a broken or stuck key from a lock
key
gauge
n.
a usually flat device with a cutaway portion indexed with a
given set of depth or spacing specifications. It is used to help
determine the combination of a key.
key holder
n. a person to whom a key has
been issued
Key-In-Knob
cylinder
n.
a cylinder used in a key-in-knob lockset
Key‑In‑Knob
lockset
n.
any lockset with a key operated cylinder in one or more knobs
Key‑In‑Lever
lockset
n.
any lockset with a key operated cylinder in one or more lever
handles
key
interchange
n.
an undesirable condition, usually in a master key system,
whereby a key unintentionally operates a cylinder or lock
key
lock
adj.
pertaining
to a device operated by a mechanical key, as opposed to combination,
electronics, etc.
key
locking
dial
n. a combination lock dial
which can be disabled by a keyed lock cylinder
key
locking
dial ring
n. a dial ring fitted with a
keyed lock that can disable the dial
key
machine
n.
any machine designed to cut keys, See also "key coding
machine" and "key duplicating machine."
key
manipulation
n.
manipulation of an incorrect key in order to operate a lock
or cylinder
key
micrometer
n.
an outside micrometer specifically made with an anvil of size
and shape to measure the root depth of bittings
key
milling
n.
the grooves machined into the length of the key blade to
allow its entry into the keyway
key
override
1.
n. a provision
allowing interruption or circumvention of normal operation of a
combination lock or electrical device,
2. adj.
of or pertaining to such a provision, as in "key override
cylinder"
key override
cylinder
n.
a lock cylinder installed in a device to provide a key
override function
key pull(s)
n.
a lock specification which indicates by quantity and
orientation the position(s) in which a key may be withdrawn
key pull
position
n.
any position, of the cylinder plug at which the key can be
removed
key
records
n.
pl. records
which typically include some or all of the following: bitting list,
key bitting array, key system schematic, end user, number of
keys/cylinders issued, names of persons to whom keys were issued,
hardware/keying schedule
Key Records
Department
n.
the department which is responsible for generating and
issuing all lock and key combinations and maintaining records of them
key
rest
n.
a
non-movable part of a key machine vise that is used to position and
align the bottom of the blade
key
retaining
adj.
1. of or
pertaining to a lock which must be locked before its key can be
removed., 2.
of or pertaining to a cylinder or lock which may prevent
removal of a key without the use of an additional key and/or tool
key section
n.
the exact cross sectional configuration of a key blade as
viewed from the bow toward the tip
key
section
identifier
n.
any tool, device or software used to identify a particular
key section
key switch
n.
a switch operated by a keyed lock mechanism, which may be an
integral part of the switch assembly
key
symbol
n.
a designation used for a key combination in the standard key
coding system, e.g., A, AA, AA1, etc.
key
system
schematic
n.
a drawing with blocks utilizing keying symbols, usually
illustrating the hierarchy of all keys within a master key system. It
indicates the structure and total expansion of the system.
key
trap
core/cylinder
n.
a special core or cylinder designed to capture any key to
which it is combinated, once that key is inserted and/or turned
slightly
key
vise
n. the part of a key machine
that holds a key
key
wound
adj. of or pertaining to a time
lock, one that is set and or powered by a removable element resembling
a key
keyed
adj.
1. combinated, 2.
having provision for operation by key, 3. of or pertaining to a
function of a lock or exit device which requires a key with a specific
combination
keyed
alike
adj.
of or pertaining to two or more looks or cylinders which have
or are to have the same combination. They may or may not be part of a
keying system
keyed
different
adj.
of or pertaining to a group of locks or cylinders, each of
which is or is to be combinated differently from the others. They may
or may not be part of a keying system.
keyed
random
adj.
of or pertaining to a cylinder or group of cylinders selected
from a limited inventory of different key changes. Duplicate bittings
may occur.
keyhole
n.
the opening through which a non‑cylinder key must pass to
enter a lock
keyhole
lock
n.
a
portable lock that may be locked into a bit key aperture to block
access
keyhole plate
n.
an escutcheon for a keyhole
keying
n.
any specification for how a cylinder or group of cylinders
are or are to be combinated in order to control access
keying
conference
n.
a meeting of the end user and the keying system supplier at
which the keying and levels of keying, including future expansion, are
determined and specified
keying kit
n.
a compartmented container which holds an assortment of
tumblers, springs and/or other parts
keying
schedule
n.
a detailed specification of the keying system listing how all
cylinders are to be keyed and the quantities, markings, and shipping
instructions of all keys and/or cylinders to be provided
keying
symbol
n. a
designation used for a lock or cylinder combination in the standard
key coding system; e.g., AA1, XAA1, XlX, etc.
keying system
n.
a series of related bittings or keyways, or the layout methods used to
create such a series where all keys are typically unique
keyway
n.
1. the opening
in a lock or cylinder which is shaped to accept key bit or blade of a
proper configuration, 2. the exact cross sectional
configuration of a keyway as viewed from the front. It is not
necessarily the same as the key section.
keyway post
n.
1. see "guide" #
2", 2.
the projecting pin of a lock or cylinder which enters the
hollow end of a key
keyway unit
n.
the plug of certain binary type disc tumbler key-in-knob
locks
keyway ward
n.
a ward which prevents entry of an incorrect key into a
cylinder or lock
kick plate
n.
a protective plate mounted on the bottom of a door to prevent
damage to minimize damage to the door
KIK
abb. Key-In-Knob
KIL
abb. Key-In-Lever
knob
screw
n. a screw used to fasten a
slip-on knob to a mortise lock spindle, or a set screw which maintains
the position of a knob on a threaded mortise lock spindle
knob
washer
n. a spacer used to shim the
clearance between a slip-on mortise lock knob and the trim
knock‑out tag
n.
the portion of a key bow where a code number may be stamped
and which is designed to be removed from the bow prior to normal usage
knuckle
n. the part of a hinge that is
formed to accept a hinge pin and act as a pivot surface for another
knuckle
KR
abb.
1. keyed random
, 2.
key retaining
KWY
abb. Keyway
© A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
L‑handle
n.
an L‑shaped handle assembly which may be lockable
L‑handle lock
n.
a cabinet lock with an L‑shaped handle
labeled
door
n.
a
door which has a fire protection certification by one of the
recognized underwriting agencies
labeled
exit
n.
a
labeled door equipped with labeled hardware that can be used for
building egress
laminated
padlock
n.
a padlock whose case is constructed of separate plates
usually riveted together
LAN-alarm
web
camera
n.
a
self-standing surveillance camera having alarm compatible for IR
devices, switches and onboard website, Internet email sending
capability
Large
Format
Interchangeable Core
n.
an interchangeable core which is too large to fit into a
small format interchangeable core housing
laser
cut
adj. 1.
a way of cutting a key so that the roots of adjacent cuts are
connected by a straight-line cut;
2. a way of
cutting a key so that the root of a shallow cut is widened until it
intersects the included angle of an adjacent deeper cut
latch
1. n.
a mechanical or magnetic door fastener which can
automatically keep a door, gate, etc., closed,
2. v.
engagement of a latch when a door, gate, etc. is pushed or
pulled closed
latch bolt
n.
a spring actuated bolt, normally with one or more beveled
surfaces, which, when aligned with the strike, engages it
automatically
latch
guard
n. a plate or combination of
interlocking pieces designed to block access to the edge of a latch
when the door is shut
latch
tube
n. the encasement portion of
some types of lockset that contains the latch and may also contain its
operating mechanism
latching speed
(of a door closer)
n.
the final speed of a door just prior to closing
latchset
n.
a non‑locking device which contains only a latch bolt, a
means of operating said latch and all required trim
layout tray
n.
a compartmented container used to organize cylinder parts
during keying or servicing
lazy
cam/tailpiece
n.
a cam or tailpiece designed to remain stationary while the
cylinder plug is partially rotated and/or vice-versa
leading
face
n. the door face closest to the
strike side of the jamb when the door is open
leaf
n.
1.One
half or section of a hinge 2. One door in a set of double doors 3. One section of a multiple
section door
left hand
adj.
1.
Pertaining to an inward swinging man door with hinges on the left
side, using the outside of the door as reference, 2. Safe lock
mounting when the lock is mounted with the lock bolt pointing to the
left when viewed from inside the safe or vault, 3. Cabinet lock
mounting when the lock is mounted with the bolt pointing away from the
hinges on the left, 4. Safe deposit box lock mounting when the hinges
are on the left as viewed from the outside of the door. 5. A vault
door which opens outward and the hinges are on the left from outside
the door.
left
hand
reverse bevel (door)
adj. pertaining to a left handed
door which swings outward
n.
the
farthest left bitting surface of a sidewinder key, as the wider
surface of the blade is viewed with the bow of the key nearest the
observer
leg
irons
n. pl.
a pair of ringlike fetters, connected by a short chain or
straight member, designed to be locked about the ankle
levels
of
keying
n.
pl. the
divisions of a master key system into hierarchies of access, as shown
in the following tables. Note:
the standard key coding system has been expanded to include key
symbols for systems of more than four levels of keying.
TWO LEVEL SYSTEM
LEVEL
OF
KEYING
KEY NAME
ABB.
KEY SYMBOL
Level II
master key
MK
AA
Level I
change key
CK
1AA, 2AA, etc.
THREE LEVEL SYSTEM
LEVEL
OF
KEYING
KEY NAME
ABB.
KEY SYMBOL
Level III
grand master key
GMK
A
Level II
master key
MK
AA, AB, etc.
Level I
change key
CK
AA1, AA2, etc.
FOUR LEVEL SYSTEM
LEVEL
OF
KEYING
KEY NAME
ABB.
KEY SYMBOL
Level IV
great grand master key
GGMK
GGMK
Level III
grand master key
GMK
A, B, etc.
Level II
master key
MK
AA, AB, etc.
Level I
change key
CK
AA1, AA2, etc.
FIVE LEVEL SYSTEM
LEVEL
OF
KEYING
KEY NAME
ABB.
KEY SYMBOL
Level V
great great grand master key
GGGMK
GGGMK
Level IV
great grand master key
GGMK
A, B, etc.
Level III
grand master key
GMK
AA, AB, etc.
Level II
master key
MK
AAA, AAB, etc.
Level I
change key
CK
AAA1, AAA2, etc.
SIX LEVEL SYSTEM
LEVEL
OF
KEYING
KEY NAME
ABB.
KEY SYMBOL
Level VI
great great grand master key
GGGMK
GGGMK
Level V
great grand master key
GGMK
A, B, etc.
Level IV
grand master key
GMK
AA, AB, etc.
Level III
master key
MK
AAA, AAB, etc.
Level II
sub-master key
SMK
AAAA, AAAB, etc.
Level I
change key
CK
AAAA1, AAAA2, etc.
lever
(combination
lock)
n. part of a combination lock
that engages the drive cam, when the proper combination is supplied,
and is directly attached to the locking bolt
lever
handle
n.
a
turn device in the general shape of an "L" used on certain locks and
latches, as an alternate to a knob for ease of use
lever
nose
n.
the hooked portion of a
lever that engages the drive cam in a combination lock
lever pack
n.
a set of lever tumblers
lever
rig
n. any device which utilizes a
fulcrum with a long bar or pole as a means to apply pressure while
drilling
n. applies directional force to the lever
lever
tumbler
n.
a flat, spring-loaded tumbler which usually pivots on a post.
It contains a gate which must be aligned with a fence to allow
movement of the bolt.
LFIC
abb.
Large Format Interchangeable Core
LH
abb.
left hand
v.
safe
lock mounting when the lock is mounted with the lock bolt pointing to
the left when viewed from inside the safe or vault
LHR
abb.
left hand reverse bevel
LHVD
abb. left hand vertical down
LHVU
abb. left hand vertical up
Life Safety Code
NFPA 101, which codifies the standards required to make buildings and other enclosures safe for occupants
lift arc
n. the distance a lever tumbler may be raised by a key from its at-rest position
n. a master
keying technique employing the use of as few progressives as possible
in order to satisfy the actual needs of the system including expansion
linkage
n. 1.
any of various parts in a lock that help transfer motion to
the bolt of a lock from a cylinder, turnpiece or other actuator not
mounted to or touching the bolt/lock case,
2. part of the
interconnected boltworks of an automotive lock
lip
(of
a strike)
n. the extended (usually
curved) leading edge of a strike
lite
n. a hole in a door
or wall to admit light, usually with glass or another transparent or
translucent pane
loading tool
n.
a tool which aids installation of cylinder components into
the cylinder shell
LOBC
abb.
1. locked on by
combination, 2.
(sic) locked on back cover
LOBC index
n. the index to which a
combination is dialed in order to remove the lock's cover
local
alarm
n. an alarm that is
annunciated in the immediate vicinity of the activating device
n. an integral part of the case used to align a safe
lock in mounting (used on locks with a spindle tube)
lock
n.
any device which prevents access or use by requiring special
knowledge or equipment
n. a picking technique
that utilizes a configured key forcefully impacted into the keyway
lock-in
adj.
of
or pertaining to a combination lock that is inoperable because the
last number of a combination is set in the forbidden zone
lock service
package
n.
a kit offered by the manufacturer or distributor of a
product, which contains what he deems required to properly service the
product
lock stile
n.
the vertical edge of a door designed for lock or latch
installation
lock window
n. an opening in the case of a
lever tumbler lock for viewing the fence entering the gates of the
levers
lockdown bar
n. an assembly which permits a
laptop computer to be used, opened, closed, but not removed from a
premises, often secured by a padlock
locked
closed
adj.
of
or pertaining to a condition wherein the bolt(s) are engaged and the
lock(s) are restricting access
locked
on
by combination
n. a combination lock cover
that can only be removed in conjunction with dialing the combination
or while the lock bolt is in motion
locked
open
adj.
of
or pertaining to a condition wherein the bolt(s) are engaged and
lock(s) are not restricting access
locker lock
n. 1.
any of various types of locks designed for a specific
mounting preparation commonly used on lockers as well as other
applications, 2.
any of various locks used to lock lockers
locking lug
n.
a fixed component of a safe which locks the safe door in
place in the locked position. See
appendix
locking lug
nut
n.
a lug nut which requires the use of a key or special wrench
lockout
n.
any situation in which the normal operation of a lock or
cylinder is prevented
lockout
key
n.
a key made in two pieces. One piece is trapped in the keyway
by the tumblers when inserted and blocks entry of any regular key. The
second piece is used to remove the first piece.
lockset
n.
a locking device, complete with trim, mounting hardware and
strike
locksmith
n. a person with the
knowledge and ability to select, install, service and/or bypass the
components of electrical or mechanical locks
LoCo
abb. low coercivity
lost
ball
keying
n.
a
keying method that uses a tiny ball(s) in the pin stack. The ball(s)
may be removed from the pin stack without disassembly of the cylinder. Typically used for
construction keying.
low
coercivity
adj. a low energy form of
magnetic encoding measuring 300 Oe which is not very resistant to
accidental erasure
lug
door
n. a usually rotatable safe door which has projections that interlock with the safe body to retain the door
© A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
MACS
abb.
maximum adjacent cut specification
magic
number
n. for an SFIC, a
value from which subtracting the control cut depth will result in the
correct top pin size, or, subtracting the top pin size will result in
the control cut depth
magnetic
contact
n.
an electrical switch activated by magnetic attraction or
repulsion
magnetic
latch
n. a latch which uses magnetic
force to stay engaged with its strike
magnetic
stripe
n.
a
thin layer of material consisting of oriented ferromagnetic oxide
particles held together by a resin binder and bonded to a non-magnetic
surface such as paper or plastic
magnetically
positioned
pin
n.
a
pin tumbler requiring magnetic energy to position it, rather than
springs or gravity
maid's
master
key
n.
the master key in a hotel master key system given to the
maid. It operates only cylinders of the guestrooms and linen closets
in the maid's designated area.
maison
key
system
n.
[from the French, meaning "house" key system] a keying system
in which one or more cylinders are operated by every key (or
relatively large numbers of different keys) in the system; e.g., main
entrances of apartment buildings operated by all individual suite keys
of the building
man door
n. a door designed to allow
access by a person. It may be located in a wall, or in another,
larger, door which has other purposes.
man trap
n.
a sally port designed for pedestrian traffic
manipulate
v.
a
dialing process typically used with combination locks to determine
operational status of the lock, potential combinations or attempt to
free the mechanism
manipulation
n. a opening method for
mechanical combination locks which uses the tolerances of that lock to
determine an opening combination
manipulation
key
n.
any key other than a correct key which can be variably
positioned and/or manipulated in a keyway to operate a lock or
cylinder
manipulation
proof
n. a combination lock with
features designed to prevent determining the combination without
physical attack
manipulation
resistant
n. a combination lock with
features that prevent determining the combination without physical
attack within a specific time limit
manual
dogging
n. 1.
an exit device that requires a physical action to dog it, v.
2. using a
wrench or a special key to dog an exit device
manufacturer
reset
code
n. in an electronic lock, a
factory-set or user-set code or combination that will restore the
factory default settings
master
blank
n. a key blank used in a
complementary keyway lock, on which only the master key combination is
intended to be cut
master
code
n. in an electronic lock, a
factory-set or user-set combination that must be used before
programming the lock
master
disc
n.
a special disc tumbler with multiple gates to receive a
sidebar, see also “master
pin” #1, see also “stepped tumbler”.
Master
Key
n. 1. a key which operates all
the master keyed locks or cylinders in a group, each lock or cylinder
usually operated by its own change key,
2. v. to
combinate a group of locks or cylinders such that each is operated by
its own change key as well as by a master key for the entire group, 3.
n. an automotive
key which operates all or most locks on a vehicle where there is also
a valet key employed
master key
changes
n.
the number of different usable change keys available under a
given master key
master
key
system
n.
1. any keying
arrangement which has two or more levels of keying,
2. a keying
arrangement which has exactly two levels of keying
Master
Keyed
adj.
1. of or
pertaining to a cylinder or group of cylinders which are or are to be
combinated so that all may be operated by their own change key(s) and
by additional key(s) known as master key(s),
2. a warded lock
whose warding has been designed to allow different hierarchies of keys
to operate
master
keyed
only
adj.
of or pertaining to a lock or cylinder which is or is to be
combinated only to a master key
master
lever
n.
a lever tumbler which can align some or all other levers in
its lock so that their gates are at the fence. It is typically used in
locker locks.
master
pin
n.
1. usually a
cylindrical shaped tumbler, flat on both ends, placed between the top
and bottom pin to create an additional shear line,
2. a pin tumbler
with multiple gates to accept a sidebar
master
ring
n.
a tube shaped sleeve located between the plug and shell of
certain cylinders to create a second shear line. Normally the plug
shear line is used for change key combinations and the shell shear
line is used for master key combinations.
master ring
lock/cylinder
n.
a lock or cylinder equipped with a master ring
master
wafer
n.
a ward used in certain binary type disc tumbler key-in-knob
locks, see also “master pin” #1, see also “stepped tumbler”
mat switch
n. a flat semi flexible device
which opens or closes a circuit when rated pressure is applied
matrix format
master keying
n.
a method of generating combinations and assigning key symbols
in a master key system through the use of a matrix
Maximum
Adjacent Cut Specification
n.
the maximum allowable difference between adjacent cut depths
Maximum
Compound
Cut Specification
n.
the maximum allowable
difference between the different depths of a compound cut
Maximum
Opposing
Cut Specification
n.
the maximum allowable depths to which opposing cuts can be
made without breaking through the key blade. This is typically a
consideration with dimple keys.
MCCS
abb. Maximum Compound Cut Specification
means of egress
n. a continuous and unobstructed way of travel from any point in a building or structure to a public way
media
safe
n.
a security container designed to maintain an internal
temperature at which multi-media will remain reliable for a set period
of time
medium
stile
adj. pertaining to an
aluminum or hollow metal door with a stile generally between 3-1/4 and
4-1/4 inches wide
mesh
change
n. a type of hand change
combination lock wheel, consisting of an inner and outer wheel which
engage each other by intermeshing teeth
metal desk
lock
n.
a cabinet lock with a vertically sliding bolt located at the
rear of the cylinder
meter lock
n.
1. a padlock
whose shackle consists of a single removable post, designed for
locking utility meters or valves,
2. any of several
small devices specifically designed to lock utility meters or valves
and which require either a key or special wrench for removal.
milling
cutter
n.
a
key machine cutter with relatively coarse pitch teeth as opposed to a
rotary file cutter
milling
runout
n. the distinctive shape caused by the curved surface of milling cutters at the bow end of a key blade
mineral core door
n. a type of fire door
mis-cut
1.
adj. of or
pertaining to a key which has been cut incorrectly,
2. n.
a mis-cut key
MK
abb.
master key
MK'd
abb.
master keyed
MK'd only
abb.
master keyed only
MK section
abb.
master key section
MKCS
abb. modified key
coding system
n.
an
individual who falsely presents himself as a locksmith
MOCS
abb.
maximum opposing cut specification
Modified
Key
Coding System
n. a modification of
the standard key coding system, in which the TMK of a system with
three or more levels of keying has a single letter name, and keys at
lower levels are named following SKCS conventions
Mogul
cylinder
n. a pin tumbler cylinder with
a diameter of 2.0", whose pins, springs, key, etc. may also be
proportionally increased in size. It is frequently used in prison
locks.
n.
a
small safe, typically with a UL rating, designed to resist burglary
attempts
monitor
pin
n.
a
device that requires a specific mechanical feature on a key, such as a
protrusion or the lack of a cut in a specific area, to allow the lock
to operate
monitored
door
n. a door equipped
with a device that reports, or reports and records, the operational
status of the door, lock or other hardware
n.
a narrow plate fixed to the bottom of a door for protection against
soiling from a mop; similar to a kickplate
mortise
1.
v.
to prepare by removing stock material from the edge of a door, drawer,
frame or opening to create a recess which allows the flush fit or
insetting of relevant lock or other hardware, 2. n. the cavity
prepared by mortising, 3. adj. of or pertaining to a locking device
designed to fit in a mortise preparation
mortise
cylinder
n.
a threaded cylinder typically used in mortise locks of
American manufacture
mortise
exit
device
n.
an exit device designed for mortise installation
mortise
lockset
n.
a lockset the case of which is designed to fit in a mortise
in the edge of a door or drawer
motion
alarm
lock
n. a security locking device
which audibly alerts upon sensing motion
movable
key
insert
n. any device pressed into or
connected to a key blank, such that its presence and movement are
required for proper key operation, and the absence of which results in
a lockout
movement
n. a mechanical, electronic or
electro-mechanical timer, designed to inhibit the final unlocking of a
combination lock or timelock
MP
abb.
manipulation proof
MR
abb.
manipulation resistant
MS
abb. Maximum Security.
A trademark of the Adams Rite Manufacturing Co.
mullion
n.
a vertical center post in the frame of a pair of doors
multi-color
finish
adj.
of or pertaining to a lockset whose finish is different for
different trim components on one side of a door
multi-part
key
n.
any
bit key not able to be duplicated by a single casting process
multi-point
lock
n.
a
lock which has more than one bolt which are thrown and withdrawn
simultaneously, often in more than one direction
multi-section
key
blank
n.
a key section which enters more than one, but not all keyways
in a multiplex key system
multiple
gating
n.
a means of master keying by providing a tumbler with more
than one gate
multiplex key
blank
n. any key blank which is part
of a multiplex key system
multiplex
key
system
n.
1. a series of
different key sections which may be used to expand a master key system
by repeating bittings on additional key sections. The keys of one key
section will not enter the keyway of another key section. This type of
system always includes another key section which will enter more than
one, or all of the keyways. 2. a keying system which uses
such keyways and key sections
muntin
n. a structural member in a
door or window used to divide a large lite into smaller ones
mushroom
pin
n.
a pin tumbler, usually a top pin, which resembles a mushroom. It is typically used to
increase pick resistance
mykey
chart
n. a matrix depicting user requested cross keying by listing keys along one axis and openings along the other. So named because it is frequently accompanied by the statement "My key goes here and here and here."
© A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
narrow
stile
adj. pertaining to
aluminum doors with stiles generally between 1-3/4 and 2-3/4 inches
wide
national
service
provider
n. a nationwide maintenance
contracting company who supplies the sub-contracted services of a
local technician to a customer
NCK
sym.
symbol for "no change key," primarily used in hardware
schedules
neck (of a
key)
n.
1. the portion
of a bit key between the shoulder and the bit(s),
2. the portion
of a cylinder key between the shoulder and the bow
negative
locking
n.
locking achieved solely by spring pressure or gravity which
prevents a key cut too deeply from operating a lock or cylinder
nest
n.
a
unitized group of safe deposit boxes, see also 'tumbler nest'
neuter
bow
n.
the
bow of a key which is unidentifiable to a particular lock manufacturer
n. National Fire Protection Association standard for
fire doors and other opening protectives
NFPA 101
n.
National Fire Protection Association life safety code
NFS
abb.
non-fail safe
nib
ward
n.
a ward formed from a lock case by bending part of the case
into the path of the key
nickel
silver
n. a brass alloy containing
nickel used in making some key blanks and tumblers
nightlatch
n. a rim mounted latch which might
contain a slide button or device to lock the latch in the retracted or
extended position
NKR
abb.
non key retaining
NLSA
abb.
National Locksmith Suppliers Association
NMK
abb.
a notation used to indicate "not master keyed" and is
suffixed in parentheses to a regular keying symbol. It indicates that
the cylinder is not to be operated by the master key(s) specified in
the regular keying symbol; e.g., AB6(NMK).
nominal
keyset
n. a keyset listed with an "X"
prefix in a cross keyed cylinder designation
non-control
chamber
n. a chamber in an IC which
does not have a separate shear line for the control function
Non-Fail Safe
adj.
a feature of a
security device designed to remain engaged, for security purposes,
during a power loss
non‑handed
adj.
pertaining to hardware that is manufactured in a way, which
allows installation on doors of any orientation without requiring
modification or adjustment to accommodate the door orientation
Non
Key
Retaining
adj.
of or pertaining to a lock whose key can be removed in both
the looked and unlocked positions
non-keyed
adj.
having no provision for key operation Note: This term also
includes privacy function locksets operated by an emergency key.
non-original
key blank
n.
any key blank other than an original
non‑removable
key
1. adj. a key which
has one or more cuts on it which trap the key in the lock upon
insertion, 2. n. a padlock specification requiring the key to be
retained in the lock unless the shackle is locked into place
non‑removable
pin
n.
pertaining to a hinge whose pin can not be removed when the
door is closed
non-reversible
n. door hardware whose hand
cannot be changed in the field
non-sized
closer
n.
a
door closer with infinitely adjustable closing force between specific
sizes
nose
n.
the part of a non‑cylinder lock which contains the keyway and
rotates within a horn
nose
puller
n.
a tool used to remove the nose of a lever tumbler lock and
allow access to the tumblers
NRK
abb.
non‑removable key
NRP
abb.
non‑removable pin
NSO
abb.
National Safemans Organization
NSP
abb.
National Service Provider
NUR
abb.
nurse's key
nurse's key
n. a selective master key used in a hospital keying system
© A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
O.b.
abb. operated by, as
used in keying schedules
occupancy type
adj.
the use to which an area of a building is put with reference
to the prevailing life safety or building code
odometer
method
n. a means of
populating the KBA as a counter from the TMK combination
Oe
abb. oersted
oersted
n. a unit of magnetic field
strength which is commonly used in the magnetic recording industry
offset
cam
n. a cam which is bent to have
its ends in different planes
oil
cup
n.
a receptacle for lubricant on a machine
n.
an
access control layout in which a central computer communicates with
panels near the openings using either distributed intelligence or
direct communication
one
bitted
adj.
of or pertaining to a cylinder which is or is to be
combinated to keys cut to the manufacturer's reference number one
bitting
one
column
progression
n.
a process wherein key bittings are obtained by using the cut
possibilities in one column of the key bitting array
one pin master
key
n.
a master key for all combinations obtained by progressing
only one bitting position
one
shot
adj.
of
or pertaining to a wire run that has an unobstructed line of sight
one-way
deadbolt
n.
a deadbolt operable from only one side of a door
open
back
strike
n. a strike, typically used on
double door applications, that has an unenclosed opening opposite the
lip edge
n.
a
combination lock with an opening in the bottom to allow direct entry
of a gravity, or pressure, operated lever when the correct combination
is dialed
open
face
dial
n.
a
combination lock actuator designed to have all the numbers visible at
once
open gated
adj.
pertaining to a lever tumbler whose gate is in the edge of
the tumbler
open loop
n. a detection circuit where
continuity between branches will result in a reportable condition
opening index
n.
the index or mark to which a combination is dialed in order
to effect an opening
operating
key
n.
any key which will properly operate a lock or cylinder to
lock or unlock the lock mechanism and is not a control key or reset
key, see also “change key”
operating
shear line
n.
any shear line which allows normal operation of a cylinder or
lock
original
key
blank
n.
a key blank supplied by the lock manufacturer to fit that
manufacturer's specific product
out
of
time
adj.
of
or pertaining to a condition where a mechanical part is misoriented
and cannot function correctly
n. a safe lock that is gear driven by a spindle
located outside of the lock case opposite the lock bolt or on either
side of the lock case
overhead
concealed
closer
n.
a
closer designed for installation out of view in the door header area
overhead stop
n.
a door stop which contacts the door near the top
v.
1.
a picking technique using a blank key to raise the tumblers to the top
of the keyway, 2. a lock defeat process that uses a comb attack to
bypass the normal locking combination, 3. a process that moves a
spring loaded tumbler beyond the operating point
override
code
n. in an electronic lock, a
factory-set or user-set combination that will always open the lock
override
combination
n. in certain locks with a user changeable combination, a second combination which allows access at all times. It is usually factory set and may not be field changeable
© A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
pack
n.
the set of tumblers in a lever tumbler or combination lock
packing
n.
material
used to provide sealing between chambers of a door closer
paddle
handle
n. a type of actuator
which is relatively flat and operates the mechanism when pivoted on an
axis near one end
padlock
n.
a detachable and portable lock with a shackle which locks
into its case
padlock
eye(s)
n. a fixture typically of flat
material or material bent at a 90 degree angle, with a hole to receive
the shackle of a padlock. Usually used in pairs.
page
master
key
n.
the three-pin master key for all combinations listed on a
page in the standard progression format
panic button
n.
any switching device in an alarm system designed to be
activated by a person in a panic situation.
It creates an immediate alarm condition
paracentric
adj.
1. of or
pertaining to a keyway with one or more wards on each side projecting
beyond the vertical center line of the keyway to hinder picking, 2.
of or pertaining to a key blank made to enter such a keyway
parallel
arm
n. a type of door closer and/or
closer mounting which leaves the arm generally parallel to the door
face when closed
parity
n. the property of being either
even or odd, as the depth number of a bitting in a combination, or the
possible progressives in a given position of a two step progression
parity
pattern
n. the collective description
of the parities of a group of bitting positions in a two step
progression, typically expressed in an even/odd sequence, e.g. EOOEEO
passage
set
n.
a latchset
n. an RFID security system used by Ford which enables
the vehicle's ignition system when a properly recognized transponder
key is validated
passive
infrared
device
n.
a
device used to detect motion by detecting changes in heat
passive
relocking
device
n. a device that places its
bolts only upon attack to the safe or lock
patented
unrestricted
keyway
n. a specific keyway which is
sold without restriction by a lock maker, but which retains patent
protection against non-original key blank makers
abb. Passive Anti
Theft System
pattern
key
n. 1.
an original key kept on file to use in a key duplicating
machine when additional keys are required,
2. any key which
is used in a key duplicating machine to create a duplicate key
pawl
n.
the cam of certain automotive cylinders
peanut
cylinder
n.
a mortise cylinder of 3/4” diameter
peel
v.
to destructively attack a safe by removing or partially
removing the sheet metal of the door front or the outer surface of one
of the other sides
peep
hole
n.
a small lens or opening which allows a limited view through a
door
perforated
tumbler
n.
a combination wheel with multiple holes within its diameter
for mounting the fly
Personal
Identification Number
n.
a series of numbers and/or letters associated with a
particular individual as a means of identification
photo-electric
detection
device
n.
a
detection device actuated by abrupt changes in light
pick
n.
1. a tool or
instrument, other than the specifically designed key, made for the
purpose of manipulating tumblers in a lock or cylinder into the locked
or unlocked position through the keyway, without obvious damage, 2.
v. to manipulate
tumblers in a keyed lock mechanism through the keyway, without obvious
damage, by means other than the specifically designed key
pick
gun
n.
a machine designed to impact all of the bottom pins of a pin
tumbler lock at exactly the same time and thereby bounce the top pins
beyond the shear line
pick key
n.
a type of manipulation key, cut or modified to operate a lock
or cylinder
Pillar lock
n. 1.
a lock mounted in a vertical support member, typically of a
vehicle or furniture, 2. (obsolete) a lock mounted on
a vehicle door
pin
v.
to install pin tumblers into a cylinder and/or cylinder plug,
see also “pin tumbler”
PIN
abb.
personal identification number
pin chamber
n.
the corresponding hole drilled into the cylinder shell and/or
plug to accept the pin(s) and spring
pin kit
n.
a type of keying kit for a pin tumbler mechanism
pin stack
n.
all the tumblers in a given pin chamber, see also “pin stack
height”
pin
stack
height
n.
the measurement of a pin stack, often expressed in units of
the lock manufacturer’s increment or as an actual dimension
pin tray
n.
see “layout tray”
pin
tumbler
n.
usually a cylindrical shaped tumbler. Three types are
normally used: bottom pin, master pin and top pin.
pin
tumbler
push key (padlock)
n. a type of padlock that
requires pushing the key inward to disengage the shackle after
insertion of the key creates a shear line
pin tweezers
n.
pl. a tool used
in handling tumblers and springs
pinning block
n.
a holding fixture which assists in the loading of tumblers
into a cylinder or cylinder plug
pinning
chart
n.
a numerical diagram which indicates the sizes and order of
installation of the various pins into a cylinder. The sizes are
usually indicated by a manufacturer's reference number which equals
the quantity of increments a tumbler represents.
pippin
file
n.
a file with a cross section that resembles a pip, or apple
seed
PIR
abb.
passive infra-red
pitcher
handle
n. lock trim which serves as a
pull and is generally perpendicular to the door at its top mount, then
bends and tapers to its bottom mount
pivot
n. a hinge with a fixed pin and
knuckle, forming a single joint
plasma
cutter
n.
tool that uses electricity and air pressure to cut various
metals
plug
n.
the part of a cylinder which contains the keyway, with
tumbler chambers usually corresponding to those in the cylinder shell
plug
follower
n.
a tool used to allow removal of the cylinder plug while
retaining the top pins, springs, and/or other components within the
shell
plug holder
n.
a holding fixture which assists in the loading of tumblers
into a cylinder plug
plug retainer
n.
the cylinder component which secures the plug in the shell
plug
spinner
n.
a tool which is designed to rotate a picked cylinder plug so
quickly in the desired direction that it cannot lock during its
rotation
v.
to
cut a key with a single motion for each cut position, bringing the
cutter and key together to alter the height of the blade
plunger lock
n.
any of various spring‑loaded locks or cylinders which move in
or out to accomplish a locking function
pocket
door
n.
a door which opens by sliding into a hollow wall
pocket
strike
n. an electric strike which
does not require a face cut in the door jam, yet allows operation of
the boltwork of the door lock, often by manipulating the locking and
deadlatching portions via end pressure
poke
hole
n.
a hole designed to allow tools to poke into or through it,
generally for accessing a retainer
pop out lock
n.
a plunger lock usually used on vending machines to prevent
operation of a T‑handle
positive
latching
n.
the condition of a door being secured such that manual
operation of the latch or bolt mechanism must occur before it may be
opened
positive
locking
n.
the condition brought about when a key cut which is too high
forces its tumbler into the locking position. This type of locking
does not rely on gravity or spring pressure.
positional
master
keying
n.
a method of master keying typical of certain binary type disc
tumbler key-in-knob locks and of magnetic and dimple key cylinders. Of all possible tumbler
positions within a cylinder, only a limited number contain active
tumblers. The locations
of these active tumblers are rotated among all possible positions to
generate key changes. Higher
level keys must have more cuts or magnets than lower level keys.
post (of a
key)
n.
the portion of a bit key between the tip and the shoulder, to
which the bit(s) is attached
post
(of
a lock)
n.
1.
a part of a lock that serves as a guide for a barrel key and prevents
entry of a non-barrel key, 2. the center bearing surface of a
mechanical combination lock on which the wheels rotate
power locks
n.
electrically or electro-pneumatically operated locks
power
pack
n. a battery with a special
configuration designed for use in a specific product
practical
key
changes
n.
pl. the total number of usable different combinations
available for a specific cylinder or lock mechanism
pre‑assembled
lockset
n.
a lock designed to be installed into a cutout in the edge of
a door. The lock body and
most or all of its trim need no further assembly other than securing
it to the door.
n.
a
specific depth of cut on a key blank that causes otherwise properly
cut keys to operate a specific secondary device within the lock, such
as a control lug
prep
n.
1. the location
and dimensions of the cut out(s) and reinforcing
in a door or frame required to accept a piece of hardware, 2.
v. to prepare a
door or frame for installation of a lock or other hardware
prep
key
n.
a type of guard key for a safe deposit box lock with only one
keyway. It must be turned once and withdrawn before the renter's key
will unlock the unit.
pressure system
n.
a
mechanical arrangement of one or more rotating bars that apply or
release closing force to a door
n. a hand operated lever which is used to apply force
to close and seal a fire and/or explosion resistant safe or vault door
so the bolts may be thrown
n. a hand operated wheel which is used to apply force to close and seal a fire and/or explosion resistant safe or vault door so the bolts may be thrown
pressure relocker
see “ERD or IRD”
primary key
n.
a key, which operates the ignition, lock on a vehicle.
It may or may not also operate some or all the other locks on
the vehicle.
privacy key
n.
a key which operates an SKD cylinder, see also “emergency
key”
profile
cylinder
n.
a cylinder with a usually uniform cross section, which slides
into place and usually is held by a mounting screw.
It is typically used in mortise locks of non-U.S.
manufacture.
profile
pin
n.
a stationary pin placed in the plug of a pin tumbler lock to
act as a ward to produce a keyway
progress
v.
to select possible key bittings, usually in numerical order,
from the key bitting array
progression
n.
a
logical sequence of selecting possible key bittings, usually in
numerical order from the key bitting array. 2. a system of generating
keys with different cut combinations for unknown positions, when a
partial bitting is known
progression
chart
n.
a
list of combinations to consider when fitting keys to a lock with only
a partial bitting known, typically arranged to minimize the number of
key blanks needed
progression
column
n.
a listing of the key bitting possibilities available in one
bitting position as displayed in a column of the key bitting array
progression
list
n.
a bitting list of change keys and master keys arranged in
sequence of progression
progressive
n.
any bitting position which is progressed rather than held
constant
proprietary
adj.
of or pertaining to a keyway and key section assigned
exclusively to one end user by the lock manufacturer. It may also be
protected by law from duplication.
protected
key
n.
a
physical key that affords legal remedies against duplication
proximity sensor
n. an electronic device that can detect
the presence of objects in its vicinity without any actual physical
contact
PRP
abb. “Proficiency Registration Program”; a locksmith certification program administered by ALOA SPAI
public
way
n. any parcel of land
essentially open to the outside air and permanently appropriated to
the public for public use and having a clear width and height of not
less than 10 ft.
n. a lock picking key that must be pulled from the lock one space
position between impacts
pull
handle
n.
trim
for gripping to apply pulling force to a door
pull
plate
n.
a
generally flat and commonly rectangular trim with an attached handle
for pulling open a door
Pullman keeper
n.
a type of keeper which is shaped to operate with the radiused
contour of a Pullman latch
Pullman latch
n.
a type of latch which pivots like a hinge and whose locking
side is radiused
punch
proof
spindle
n.
a spindle that is shouldered or tapered inward to prevent it
from being driven into or through the mechanism
pulse
dialer
n.
a telephone communication device, normally activated by an
alarm, that uses electrical pulses to dial a predetermined number
n. a lock picking key
that centers itself after each impact
push
plate
n.
a
generally flat and commonly rectangular trim mounted for hand contact
to push open a door
push
button
lock
n.
a self contained lock with controls that must be pressed in a
specific pattern or sequence to open the lock
push
key
padlock
n. a padlock whose shackle is released by full insertion of the key into the lock
© A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
quadrant
n. a Dutch door lock with a bolt that is ¼ of a circle
© A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
rabbeted
door
n.
a
door having and edge contoured with an offset creating two surfaces
which form an overlap at the abutting edge
rabbeted
lock
n.
a
lock with a face or front which is specially formed to use in a
rabbeted door
radio
frequency
identification
n. an identification technology
using short range radio frequency transmission
radiused
blade
bottom
n.
the bottom of a key blade which has been radiused to conform
to the curvature of the cylinder plug it is designed to enter
rail
n.
the horizontal construction member located on the top and
bottom of a door
rake
(rake
& hang)
n. a picking technique that
attempts to use quick withdrawal of the pick to set the tumblers
random
master
keying
n.
any undesirable process used to master key which uses
unrelated keys to create a system
randomized
order
n. 1. an
arrangement of cut depths in a KBA without numerical order, 2. an
arrangement or list, such as a bitting list, in which the information
is sorted in no easily discernible pattern
rap
v.
1. to unlock a
plug from its shell by striking sharp blows to the spring side of the
cylinder while applying tension to the plug,
2. to unlock a
padlock shackle from its case by striking sharp blows to the sides in
order to disengage the locking dogs
ratchet lock
n.
a lock which adjusts to fit different applications by sliding
one part through another, held by a pawl engaging one of several cogs
rated
adj.
of
or pertaining to a product's compliance with one or more recognized
standards such as UL.
read
v.
to decode a lock combination visually without disassembly of
the lock or cylinder
read
key
n.
a key which allows access to the sales and/or customer data
on certain types of cash control equipment (e.g., cash register)
reader
n. a device used in an access
control system to interrogate an electronic, magnetic or optical type
of credential
rear
drive
adj.
of
or pertaining to a combination lock with the wheel pack located
between the dial and the drive cam
recombinate
v.
to change the combination of a lock, cylinder or key
record
safe
n.
a safe whose primary purpose is to preserve paper documents
against fire
recore
v.
to rekey by installing a different core
redundant
button
n.
a secondary release switch for an egress device to allow
unlocking in case of a malfunction of the primary release switch
register
groove
n.
the
reference point in the milling of a key blade from which some
manufacturers index the bitting depths, and which indexes the key
blade in a keyway
register
number
n.
1. a reference
number, typically assigned by the lock manufacturer to an entire
master key system, 2. a blind code assigned by
some lock manufacturers to higher level keys in a master key system
rekey
v.
to change the existing combination of a cylinder or lock
n.
a
typically spring loaded bolt, designed to engage a safe’s boltwork,
when the safe lock is disturbed, and prevent the boltwork from
operating
relock
trigger
n. the part of a safe relocking
device which causes the mechanism to activate
relocking
device
n. any device intended to
prevent normal opening of a safe as a result of an attack, two types
are typically used, internal and external
n.
a
device for permitting the control of functions, of a lock device or
alarm, at a distance
n.
a
mechanical fob key that has a remote as the bow
remote release
n.
a mechanism for permitting the unlocking of any lock device
at a distance from the device
removable
core
n.
a key removable core which can only be installed in one type
of cylinder housing; e.g., rim cylinder or mortise cylinder or
key-in-knob lock
removable
cylinder
n.
a cylinder which can be removed from a locking device by a
key and/or tool
removable
dial
n.
a
combination lock actuator that may be taken from the lock when not in
use
removable
shackle
adj.
referring to a type of padlock which is unlocked by removing
the shackle from the case
removal
key
n.
the part of a two-piece key which is used to remove its
counterpart from a keyway, see also “control key” #1 & #3, see
also “construction breakout key”
renter's
key
n.
a key which must be used together with a guard key, prep key
or electronic release to unlock a safe deposit lock. It is usually
different for every unit within an installation.
repin
v.
to replace pin tumblers, with or without changing the
existing combination
reset
code
n. in an electronic lock, a
factory-set or user-set code or combination that will restore all
factory default settings except the current reset code and the audit
trail
reset
key
n.
1. a key used to
set some types of cylinders to a new combination. Many of these
cylinders require the additional use of tools and/or the new operating
key to establish the new combination.
2. a key which
allows the tabulations on various types of cash control equipment
(e.g., cash registers) to be cleared from the records of the equipment
resettable
tumbler
n.
a tumbler which can have its reference position altered by
reorientation within the cylinder without disassembly
resistor
pellet
n.
the encapsulated resistor with exposed contacts installed in
a key, such as that for VATS
restraint
n. a device designed with a
shackle that restricts the movement or actions of a person, such as
handcuffs
restricted
adj.
of or pertaining to a keyway and corresponding key blank
whose sale and/or distribution is limited by the lock manufacturer in
order to reduce unauthorized key proliferation
retainer
n. a component which is
clipped, staked, or driven in place to maintain the working
relationship of other components
retainer
pin
n.
1. a component
seated on a spring, in the end of a plug, that interacts with a
retainer cap to keep it in place,
2. any
non-threaded rod that maintains the relationship of two or more
different parts.
retrofit
lever
n. a lever handle designed to
replace the knob of a lockset
return
n. 1.
the extension of a cam which bends back towards the mounting
surface and the measurement of the remaining distance from the
mounting surface to the end of the cam,
2. the distance
from a door face to the tip end of a lever handle
reveal
n. the distance measured from
the trim surface of the jamb to the leading face of the door on the
stop side when closed
reverse
bevel
adj. pertaining to the bevel of a
door which swings towards the outside
reverse
keyway
n.
a
keyway shape that is a mirror image of another
reverse
strike
n. a strike used for rim
mounted hardware used on reverse bevel doors
reversible
adj.
pertaining to hardware that is manufactured in a way, which
allows field assembly or adjustment to accommodate installation on
doors with different orientations
reversible key
n.
a
usually symmetrical key which may be inserted either way up to operate
a lock
RF
abb.
Radio Frequency
RFID
abb.
radio frequency identification
RH
abb.
right hand
v.
safe
lock mounting when the lock is mounted with the lock bolt pointing to
the right when viewed from inside the safe or vault
RHR
abb.
right hand reverse bevel
RHVD
abb. right hand vertical down
RHVU
abb. right hand vertical up
riffle pick
n. a cylinder bypass device that has a
waveform shape inserted into the keyway to manipulate tumblers
right hand
adj.
1. pertaining to an inward swinging man door with hinges on the right
side, using the outside of the door as reference, 2. safe lock
mounting when the lock is mounted with the lock bolt pointing to the
right when viewed from inside the safe or vault, 3. cabinet lock
mounting when the lock is mounted with the bolt pointing away from the
hinges on the right, 4. safe deposit box lock mounting when the hinges
are on the right as viewed from the outside of the door. 5. a vault
door which opens outward and the hinges are on the right from outside
the door
n.
the
farthest right bitting surface of a sidewinder key, as the wider
surface of the blade is viewed with the bow of the key nearest the
observer
rim
cylinder
n.
a cylinder typically used with surface applied locks and
attached with a back plate and machine screws. It has a tailpiece to
actuate the lock mechanism,
rim
exit
device
n.
an exit device mounted on the door surface
rim lock
n.
a lock or latch typically mounted on the surface of a door or
drawer
rim
vertical
rod exit device
n.
a vertical rod exit device mounted on the door surface
ring key
n.
a key attached to a ring to be worn on the finger
R&R
v. a common notation for remove and
replace as a part of service
RL
abb. The title “Registered Locksmith” as awarded by ALOA SPAI
RLD
abb.
relocking device
abb. relock trigger
RM
abb.
row master key
root depth
n.
the dimension from the bottom of a cut on a key to the bottom
of the blade
rose
n. a usually circular
escutcheon
rotary
file
cutter
n.
a key machine cutter with very fine teeth which are formed by
stamping, such as a file
n.
a
circular tumbler with one or more gates. Rotation of the proper key
aligns the tumbler gates at a sidebar, fence or shackle slot.
rotating
constant
n.
one or more cut(s) in a key of any level which remain
constant throughout all levels and are identical to the top master key
cuts in their corresponding positions. The positions where the top
master key cuts are held constant may be moved, always in a logical
sequence
rotating
constant
method
n.
A method used to progress key bittings in a master key
system, wherein at least one cut in each key is identical to the
corresponding cut in the top master key. The identical cut(s) is moved
to different locations in a logical sequence until each possible
planned position has been used.
round back
adj.
pertaining to a rim cabinet lock whose mounting flanges and
case form the general shape of a circle when viewed from the back
round
cornered
latch
adj.
of
or pertaining to a latch mounting plate with radiused corners
rounded
front
n.
a lock front or face plate that is radiused to match the edge
of the door
row
master
key
n.
the one-pin master key for all combinations listed on the
same line across a page in the standard progression format
RS-485
std. an Electronics Industry
Association (EIA) standard for serial multipoint communications
commonly used in online access control systems for distances up to
4000 feet
RST
abb. the title "Registered Safe Technician" as awarded by NSO
© A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
S/A
abb.
sub-assembled
safe
n. a substantial, secure
container with varying degrees of security and/or fire resistance,
used to store valuables against fire or theft
safe
deposit
n. a typically key accessed
container that requires dual key operation, usually located inside a
vault
safe
deposit
function
adj.
an
operational characteristic of a lock which requires two separate keys
working in tandem to open the lock
safe
deposit
lock
n.
a
lock that typically requires two separate keys to access a container
safe
door
n.
that portion of a safe used to gain access to the contents of
the safe in a normal day to day manner
sally port
n.
an access control area with doors or gates secured by
interlocks such that only one may be opened at a time
sash
lock
n.
a
type of window lock
SAVTA
abb.
Safe and Vault Technicians Association
SBCCI
abb.
Southern Building Code Congress International
scalp
n.
a thin piece of metal which is usually crimped or spun onto
the front of a cylinder. It determines the cylinder's finish and may
also serve as the plug retainer.
Scandinavian
padlock
n.
A cast case padlock with an elliptical cross section.
The locking mechanism is a set of rotating disc tumblers,
which engage notches in the cast shackle and may be rotated by the
angled cuts cast on the key.
scan
tool
n. an automotive
diagnostic tool used to read fault codes, and in some cases configure
or program various modules or keys
screen door
lock
n.
a lock designed for the thin stiles typically found on screen
and storm doors
screw
change
(wheel)
n. a perforated tumbler that
may have its combination set by placement of a screw in one of the
perforations
screwless knob
n.
a mortise lock knob assembly secured to the spindle without
screws
screwless rose
n.
a mortise lock rose installed without screws
SDB
abb. safe deposit box
seal
n.
a single use device intended to give recognizable evidence to
the physical opening or entry of a door, container, or space
second
generation duplicate
n.
a key reproduced from a first generation duplicate
secondary key
n.
a key which operates certain locks on a vehicle, but not the
ignition lock
secret gate
latch
n.
a small keyless rim latch, which when properly installed, is
operated by pressing a concealed actuator
sectional
trim
n. a design that uses two or
more escutcheons on the same side of a door for a single lock
security
collar
n.
a protective cylinder collar, see also “cylinder guard”
security
leg
keyway
n. a key section and keyway
design that incorporates two non-curved planes of the key blade
intersecting at an angle between 1 and 89 degrees
segmented
follower
n.
a plug follower sliced into sections which are introduced
into the cylinder shell one at a time. It is typically used with
profile cylinders.
n.
an
incidental key whose combination is taken from an individual key and
the unique bitting of a selective master key
selective
key
system
n.
a key system in which every key has the capability of being a
master key. It is normally used for applications requiring a limited
number of keys and extensive cross keying.
selective
master
key
n.
an unassociated master key which can be made to operate any
specific lock(s) in the entire system in addition to the regular
master key(s) and/or change key(s) for the cylinder without creating
key interchange
self
closing
adj.
pertaining to doors or covers which have a continuous force
applied in the closing direction
semi-automatic
key
machine
n.
a
machine capable of duplicating keys with limited manual operations
sequence of
progression
n.
the order in which bitting positions are progressed to obtain
change key combinations
series
wafer
n.
a type of disc tumbler used in certain binary type disc
tumbler key-in-knob locks. Its presence requires that no cut be made
in that position on the operating key(s)
serrated
fence
n. a fence with "V" shaped
notches on a contact surface to inhibit manipulation
serrated
tumbler
n. 1.
a disk tumbler with "V" shaped notches in its sides that do
not allow operation, 2. a lever tumbler which has
"V" shaped notches in the contact end near the gate,
3. a pin tumbler
with "V" shaped grooves around its circumference,
4. a combination
wheel with "V" shaped notches along its outside diameter
service
code
n. in an electronic lock, a
factory set or user set code or combination that will open the lock
one time
service
hole
n. 1.
an aperture aligned with each chamber, providing a path for
the ejector pin to drive the entire pin stack from an IC,
2. a hole in a
cylinder shell intended to provide access for rekeying without
disassembly of the cylinder
service key
n. 1.a blank that has been cut to check
or test the mechanical operation of an automotive lock that is
intended to be operated by a key with added security features, 2. a
high security key with cuts for a secondary mechanism that has the
primary cuts at the deepest depth possible to assist in
disassembly/reassembly
service
panel
n. the back cover of a safe
door which must be opened or removed to allow access for repairs
servicemark
keyway
n. any keyway whose shape has
been configured to receive protection under trademark or servicemark
law
set
v. obtaining a shear line when picking; see also
'combinate'
set
screw
n. a screw used to fasten a
component in a fixed position relative to another component
set-up key
n.
a key used to calibrate some types of key machines
set-up
plug
n.
a type of loading tool shaped like a plug follower. It
contains pin chambers and is used with a shove knife to load springs
and top pins into a cylinder shell.
seven
column
progression
n.
a process wherein key bittings are obtained by using the cut
possibilities in seven columns of the key bitting array
seven pin
master key
n.
a master key for all combinations obtained by progressing
seven bitting positions
sex
bolt
n. a nut and bolt set used to
through bolt, with a closed nut basically flush with the mounting
surface creating the appearance of a carriage bolt
SFIC
abb.
Small Format Interchangeable Core
shackle
n.
1. the part of a
padlock, which passes through an opening in an object or fits around
an object and is ultimately locked into the case,
2. the portion
of a restraint which fits around the wrist, ankle, neck, waist or
thumb
shackle
retaining pin
n.
a pin which keeps an unlocked shackle heel in the case
shackle spring
n.
a spring which pushes the shackle into the open position when
the padlock is unlocked
shank
n.
1. the part of a bit key
between the bow and the stop; or, if there is no shoulder stop, the
part between the bow and the near side of the bit, 2. a smaller
diameter portion of a knob that is positioned between the larger
portion of the knob and the rose or the door surface
SHDA
abb. Security Hardware
Distributors Association (formerly NLSA)
shear-head
bolt
n. a threaded
fastener which is designed to have the head break off when the correct
torque is reached
shear
line
n.
a location in a cylinder at which specific tumbler surfaces
must be aligned, removing obstruction(s) which prevented the plug from
moving
shell
n.
the part of the cylinder which surrounds the plug and which
usually contains tumbler chambers corresponding to those in the plug
shim
1.
n. a thin piece
of material used to unlock the cylinder plug from the shell by
separating the pin tumblers at the shear line, one at a time,
2. v.
to unlock a cylinder plug from its shell by using a shim
shipping
pin
n. a pin or block
used to prevent relockers from accidentally firing during shipment of
a safe or vault door
shoe
n.
1. a bracket
which attaches the arm of a door closer to the door or frame,
2. the surface
mounted case and guide components of an exit device,
3. a mortise
lock component which transfers pivoting motion of a thumbpiece to
linear movement of the latch bolt
shoulder
n. a projection from a key that can be any key stop
other than a tip stop, see also "bow stop". Some shoulders on keys
serve no functional purpose.
shouldered
chamber
n. a pin chamber with an
internal shelf that limits travel of a complementarily shaped bottom
pin
shouldered
pin
n. a pin tumbler shaped as to
prevent it from fully entering an unoccupied keyway or limit its
travel within a pin chamber
shouldered
spindle
n. in a safe lock, a spindle
with a larger uniform diameter toward outside to prevent punching the
spindle into the container
shove knife
n.
a tool used with a set-up plug which pushes the springs and
pin tumblers into the cylinder shell
showcase lock
n.
normally a ratchet lock or plunger lock used on bypassing
doors
shrouded
shackle
n.
a shackle which is protected from cutting or tampering by
design or by the use of secondary shields
shunt switch
n.
a maintained contact switch, often key operated
shut
out
key
n.
usually used in hotel keying systems, a key which will make
the lock inoperative to all other keys in the system except the
emergency master key, display key, and some types of shut out keys
shut
out
mode
n.
the state of a hotel function lockset which prevents
operation by all keys except the emergency master key, display key,
and some types of shut out keys
shutter
n.
1.
a spring-loaded device which closes upon the removal of a cylinder
tailpiece, protecting a locking device from being manipulated, 2. a
spring-loaded device which covers a cylinder keyway when the key is
not in it, also see appendix
shutter spring
n. a spring which returns the
shutter on a lock to the closed position
sickle key
n.
a key in the form of a sickle inserted through a hole in a
door to actuate a bolt on the opposite side of the door
n. any non-automotive key with bitting(s) milled
into, but not through, one of the widest sides of the key blade
side
milling
slotter
n.
a key machine cutting wheel with a squared edge that can cut
on the side as well as the periphery of the wheel
side sheath
n. a portion of a multi-part
pin tumbler lock plug used to complete the shear line fully around the
plug
side ward
n.
a ward which prevents entry of an incorrect key into a
non‑cylinder lock
side ward cut
n.
a cut made into a key to bypass a side ward
sidebar
n.
a
cylinder locking member mounted longitudinally in a plug, which
engages multiple tumblers
sidebar lock
n.
a lock mechanism which incorporates a sidebar
sidecode
variant
n. a master keying style of pin
tumbler locks which uses the keying capabilities of the secondary
security technology to effect master keyed locking.
Obtaining a single key in the system does not reveal the same
secondary combination of all keys.
sidewinder key
n.
an automotive key whose bitting surface(s) are serpentine grooves,
generally cut into the wider surface of the key blade
silent
signal
adj. describes an alarm that
annunciates detection to a remote location instead of a local
location
simple latch
n.
a non‑deadlocking latch
simplex key
section
n.
a single independent key section which cannot be used in a
multiplex key system
simultaneous
retraction
n.
a feature which allows retraction of both the deadbolt and
latchbolt in the same operation
single
acting
(door)
n.
a door which swings from the latched position in only one
direction
single acting
lever tumbler
n.
a lever tumbler which must be moved a minimum distance to
allow travel of a bolt, but cannot be moved so far as to restrict
travel of the bolt
single
cylinder
adj.
pertaining to a lock with key operation from only one side
single-D
adj. the shape of a cutout for a
lock, circular except for a flat section on one side
single key
section
n.
an individual key section which can be used in a multiplex
key system
single step
progression
n.
a progression using a one increment difference between
bittings of a given position
six
column
progression
n.
a process wherein key bittings are obtained by using the cut
possibilities in six columns of the key bitting array
six pin master
key
n.
a master key for all combinations obtained by progressing six
bitting positions
SKCS
abb.
standard key coding system
SKD
sym.
symbol for "single keyed", normally followed by a numerical
designation in the standard key coding system; e.g., SKD1, SKD2, etc.
It indicates that a cylinder or lock is not master keyed but is part
of the keying system
skeleton key
n.
any non‑cylinder key whose bit, blade, and/or post is cut
away enough to allow it to enter and turn in locks with different ward
arrangements
slide
hammer
n.
a tool made from a rod with a handle, a sliding weight on the
rod, and a means of attaching to a part to force its movement relative
to other parts
slider
n.
a tumbler which is normally flat, has a gate and moves with a
linear or lateral motion instead of pivoting like a lever tumbler
n.
a
guard tumbler in a single nose safe deposit lock that allows an
operating key to unlock after the guard key is turned and removed
slim jim
n.
a narrow strip of spring steel used to bypass the cylinder
and unlock vehicle doors
sling
n. a cable or layered length of
fabric, (usually the latter), with woven loops in both ends, used to
lift a safe or vault door with a boom arm lift or forklift.
slotter
n. a key machine cutter
designed to make cuts with a rectangular shape
Small
Format
Interchangeable Core
n.
an interchangeable core that replicates the functionality and
design popularized by Best
adj.
a
key that has a proximity device function to operate a lock
smartcard
n. a card conforming to ISO
specification 7810 and 7816 which one or more integrated circuits with
contacts allowing interface to external equipment
SMK
abb.
sub-master key
SMNA
abb. Safe Manufacturers' National
Association
smokeproof
adj.
referring
to an area or opening protected against the penetration of smoke
smoking
(a
key)
v. the action of
holding a key or blank over an open flame so that it collects carbon
snap
bow
n.
1. a separate
bow which can be affixed to a smaller key bow,
2. a bow which
retrofits transponder technology to conventional keys for use in
access control systems
snubber
bar
n.
a
device used with the time lock on a safe or vault to prevent
retraction of the boltwork before a pre-determined time
software
key
n.
data used by software to provide or deny access. See also
'hardware key'
SOP
abb. Sequence of
Progression
n.
an
audible annunciator that, when activated, indicates a situation
requiring action
spacing
n.
the dimensions from the stop to the center of the first cut
and/or to the centers of successive cuts
spanner
wrench
n. a tool for installing,
removing or adjusting a threaded part. The tool is designed to engage
one or more holes or depressions which are peripheral or not on-center
to the part axis.
spare tire
lock
n.
a lock designed to prevent removal of a vehicle's spare tire
special
application cylinder
n.
any cylinder other than a mortise, rim, key-in-knob or
profile cylinder
SPF
abb. Standard Progression Format
spider
cam
n.
a
rotary mechanism serving to simultaneously control the operation of
multiple bolts with a radial arrangement
spider
lock
n.
a
lock that utilizes a special cam as an integral part of the lock to
extend or retract the multiple bolts of the lock simultaneously
spindle
n.
a component which transfers rotary motion from outside a lock
or latch case to an inner mechanism
n.
a
groove in a combination lock spindle designed to accept a spline key,
2. the cavity(s) in the shell of a wafer tumbler lock which allows
extension of the tumblers to a locked position
spline
key
n. a device inserted to
position the drive cam relative to the spindle in a combination lock
spline
way
n. a notch in a combination
lock drive cam designed to accept a spline key
split
astragal
n.
an
astragal constructed of two pieces; each piece being mounted on either
door of the pair, and abutting to create a seal
split
bolt
adj. two separate bolts housed in
the same opening in a face of a lock, each operated independently from
opposite sides of the door
split
finish
adj. of or pertaining to a
lockset whose finish is different on each side of the door
split
hub
n. a two-piece hub which can
allow motion from one side of a swivel spindle while preventing it
from the other side
split
pin
master keying
n.
a method of master keying a pin tumbler cylinder by
installing master pins into one or more pin chambers
split spindle
n.
a multi‑piece spindle which allows a knob or lever to be
installed on only one side of a door
split wafer
n. Disc tumblers which are
approximately half the width of a full tumbler used in the same lock,
and are paired adjacent to one another in the same cut position. Typically used in automotive
locks.
spool pin
n. a pin with a
uniform smaller diameter except at its ends. Typically a top pin used
to augment pick resistance but also observed as bottom and master
pins.
spring cover
n.
a device for sealing one or more pin chambers
spring
hinge
n. a hinge incorporating a
mechanism to apply automatic closing force
spring latch
n. a latch operated under
spring pressure, having no deadlatching feature
spring seat
n.
the point at which a spring is anchored, located or attached
and at which (from which) it exerts force
n. the part of a disc
tumbler that serves as a spring seat
n.
a combination lock component complemented by a spy proof dial ring to
limit the viewable numbers' being dialed
n.
a
combination lock component that limits the viewable numbers on a
compatible dial
square back
adj.
pertaining to a rim cabinet lock whose mounting flanges and
case form the general shape of a square
square
corner
latch
n.
a
latch with a face whose sides meet at 90 degree angles
stand
alone
n. a self contained electronic
lock device
Standard
Key
Coding System
n.
an industry standard and uniform method of designating all
keys and/or cylinders in a master key system. The designation
automatically indicates the exact function and keying level of each
key and/or cylinder in the system, usually without further
explanation.
Standard
Progression
Format
n. a systematic method of listing and relating all change key combinations to all master key combinations in a master key system. The listing is divided into segments known as blocks, horizontal groups, vertical groups, rows, and pages, for levels of control.
standard
n. a specification relating to materials, finishes, construction, resistance, and/or strength that typically establishes requirements
staple
n. the portion of a hasp
assembly with the hole or opening to receive a padlock
n. a device, usually
electro-mechanical, which can provide information to a system as to
whether the protected opening is open or closed, or position of a
latch
step
pin
n.
a spool or mushroom pin which has had a portion of its end
machined to a smaller diameter than the opposite end. It is typically
used as a top pin to improve pick resistance by some manufacturers of
high security cylinders.
stepped
tumbler
n.
a special (usually disc) tumbler used in master keying. It
has multiple bearing surfaces for blades of different key sections.
stile
n. the vertical construction
member located on either edge of a door
stop (of a
door)
n.
the projecting portion of a doorframe upon which the door
rests when closed
stop
(of
a key)
n.
the part of a key from which all cuts are indexed and which
determines how far the key enters the keyway
stop
gauge
n. the part of a key machine
that aligns a key blank, a pattern key, or both, so that the blank may
be cut correctly
stop works
n.
a button or toggle mechanism which prevents operation of a
knob, lever or thumbpiece in a non-bored lock
stop works
button(s)
n.
a one or two-piece stop works activator
store door
function
n.
a lockset function in which:
a) a deadbolt is operated by key from either side and a latch
is operated by working trim from either side;
or b)
a deadlocking latch can be withdrawn by working trim from
either side except when both sides are locked by key from either side.
store door handle
n. a device that acts as a pull handle on
the outside of commercial buildings
STPRP
abb. “Safe Technicians Proficiency Registration Program”; the certification program of SAVTA as administered by ALOA SPAI
straight
knife
n. a bypass tool for manipulating a spring bolt directly behind the cylinder plug
straight tailpiece (lock) – adj. A mechanical dial-type combination lock with wheels whose gates are aligned by dialing the combination and whose aligned gates can then accept a tailpiece attached to the boltwork, allowing the boltwork to be retracted.
strike
n. a bolt receptacle typically
mounted in the door jamb or the floor
strike
locator
n.
a tool used to mark the jamb, relative to the bolt of the
lock, prior to strike installation
strike
reinforcer
n. a metal plate mounted behind
a strike, using long screws to secure it to the door frame
strikethru
keying
n.
a
means of shaping a key bitting by tooling which presses the key in
such a way as to leave an indentation on one bitted surface or side of
the key, and a protrusion on the other
stump
n. the stationary fence(s) in a
lever lock
sub-master
key
n.
the master key level immediately below the master key in a
system of six or more levels of keying
n. one of the lower level control keys available when
master keying the control function of an interchangeable core or
removable core
substitution
code
n.
a code whose individual characters are converted to
individual key cuts or combination numbers by means of a reference
table
Suffolk
latch
n.
a
door latch consisting of a horizontal bar which moves vertically to
unlatch on the inside, actuated by a thumb piece on the outside
supervised
security seal
n. a device which provides
visual indication of tampering and includes the ability to be
connected into electronic security systems
surface pull
n. a handle or grip attached to
the surface of a door or drawer
surreptitious
entry
n. the use of entry
or bypass techniques that cannot be detected via disassembly and
detailed inspection of lock components
sweep
n. the radiused part of a lever
tumbler with which the key makes contact
sweep
speed
n. the speed at which a closer
moves a door from open to the point where latching speed is engaged
swing clear
hinge
n.
a hinge that allows the door to swing far enough away from
the jamb to fully clear the opening at 90 degrees open
switch lock
n.
1. a lock which
incorporates an electrical switch as an integral part of its
construction, 2.
a large padlock designed for use on railroad switches
swivel spindle
n. normally a two-piece spindle assembly whose two halves are designed to turn independently
© A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
t-b
abb. tip-to-bow
T-handle
n.
a T-shaped handle assembly which may be lockable
T-strike
n.
a
strike whose lip spans the middle portion (but not the full height) of
the strike
tactile
adj. of or pertaining to a knob,
lever or other device to open a door, which conveys a special sense of
touch; typically used as a warning to the visually impaired of danger
on the other side of the door
tailpiece
n.
an actuator attached to the rear of the cylinder, parallel to
the plug, typically used on rim, key-in-knob or special application
cylinders
talon
n.
the part of a lever lock bolt that is relieved to allow the
key to enter and move the bolt
tamper
resistant
fastener
n. any one of several screws or
nuts which have a specialized head, requiring a special-access tool
for removal
tamper
switch
n.
a sensor that signals when
someone attempts to access the mechanism of a security device
TCP
abb.
transmission
control protocol
TCP/IP
n.
the
system networks use to communicate with one another
telescoping
bolt
n.
the bolt of a locking device which extends and retracts by
successive overlapping sections
telescoping
column
n.
a steering column adjustable for length
template
n.
a pattern used to mark cutout locations for hardware
installation
template hinge
n.
a hinge with dimensions, hole locations and tolerances which
conform to ANSI standard A156.7
tension
washer
n. a
flexible washer under a wheel pack in some combination locks for
adjusting tension on that wheel pack
tension
wrench
n. a tool used to apply torque
to a lock bolt or cylinder plug while attempting picking
theoretical
key
changes
n.
pl. the total
possible number of different combinations available for a specific
cylinder or lock mechanism
n.
an
incidental master key combination that can be cut to operate more than
one lock keyed to a MK and a CK in a system
thermal
lance
n.
an instrument, used for cutting with a pure oxygen feed, that
uses itself and the material being cut as fuel
thermal
relocker
n. a relocking device which is
activated by heat
n. the raised round part of a mortise lock escutcheon that the knob seats upon
thimble strike – n. a metal tube with a closed end that is installed in a door frame and receives a locking bolt or latch
threaded rose
n.
a rose with an internally threaded ferrule
three
column
progression
n.
a process wherein key bittings are obtained by using the cut
possibilities in three columns of the key bitting array
three pin
master key
n.
a master key for all combinations obtained by progressing
three bitting positions
three point
latch
n.
a self‑latching device designed to latch a door at the top,
bottom and edge
throat cut
n.
the cut made into a key to bypass a throat ward
throat ward
n.
an obstruction formed in a lock's case or horn at the point
of key entry, which prevents key rotation
throw
n.
the distance a bolt or latch projects from the faceplate or
case of a lock in the extended position
throw member
n.
an intermediate actuator which engages the rear of the plug
to transfer motion to a cam, tailpiece or other actuator
thumb cuffs
n. restraints designed to lock
on the thumbs
thumb
index
n. a projection of metal on a
key bow which serves as a tactile means of orienting a non reversible
key for correct lock insertion
thumb
latch
n.
a
lock with a thumbpiece to actuate the latch
n.
the
part of a rim latch that can be used to lock the bolt in either the
retracted or extended position until released
thumb
turn
n. a actuator which can be
turned by thumb and forefinger
thumb turn
cylinder
n.
a cylinder with a turn knob rather than a keyway and tumbler
mechanism
thumbpiece
n.
a generally flat, projecting latch actuator found above a
grip handle and depressed by the thumb
tilt column
n.
a steering column design which permits vertical adjustment of
the steering wheel
time
delay
n.
and adj. a feature which prevents operation until a set
amount of time has elapsed. Activation normally begins when access,
egress or other unlocking is desired.
time
delay
lock
n.
a
lock that has a mechanism for preventing unlocking until a specific
amount of time has passed
time
lock
n.
a secondary device which prevents movement of a bolt or
boltworks until a set amount of time has elapsed. The device is
normally set or activated at the time of locking.
n.
an
access control or alarm condition or authorization rendered at, and
limited to, specific regularly occurring periods
time
zoning
n.
the
specification of a period in a 24 hour day and/or 7 day week in which
a given credential or group of credentials may be accepted
timing
n. the engagement or
positioning of an assembly of internal parts so as to produce the
desired sequence of engagement during operation
n.
a
mark, usually center punched, on two separate gears or parts to
identify correct alignment of those parts
tip
n.
the portion of the key which enters the keyway first
tip stop
n. a type of stop located at or near the tip of the key
tip to bow - n. an order of reading/recording a bitting combination
tips
&
stems
n.
a key bow and shank that uses a detachable end with a bit(s)
on it
TL-15
n. a U.L. rating given to a
container whose door has been tested against forcible entry, with
common hand tools, for a period of 15 man minutes
TL-30
n. a U.L. rating given to a
container whose door has been tested against forcible entry, with
common hand tools and/or abrasive cutting wheels and power saws, for a
period of 30 man minutes
TMK
abb.
top master key
toe (of a
shackle)
n.
that part of the shackle, which may be removed from the
padlock body
toggle
n.
a pivoting one-piece stop works activator
token
n. a self-contained electronic
key
tolerance
n.
the deviation allowed from a given dimension
tone
dialer
n.
a telephone communication device, normally activated by an
alarm, that uses a series of tones to dial a predetermined number
n. – the highest level control key when master keying
the control function of an interchangeable core or removable core
top-down
order
n. an arrangement of
potential key cut depths within a KBA beginning at the shallowest and
continuing to the deepest
top jamb mount
n.
surface application of a door closer body directly to the
header
Top Master Key
n.
the highest level master key in a master key system
top of blade
n.
the bitted edge of a single bitted key
top
pin
n. usually a
cylindrical shaped tumbler, usually flat on both ends and installed in
direct contact with the spring in the pin stack
Total
Position
Progression
n.
a process used to obtain key bittings in a master key system
wherein bittings of change keys differ from those of the top master
key in all bitting positions
touch bar
n.
a type of exit device actuator which typically does not pivot
and retracts the bolt with a minimum of pressure
touch pad
n.
1. an exit
device actuator with a paddle shape,
2. a remote door
opener activator, typically electric or electronic, which facilitates
handicap access
n.
the
bitting surface of a sidewinder key formed when it is cut
trailing
face
n.
the
door face farthest from the strike side of the jamb when the door is
open
transom
catch
n.
a
surface mounted latch, typically having an actuator operated by a long
pole or an attached pull chain
transponder
key
n. a key
with an electronic component which can convert a radio signal into an
electrical current enabling the key to transmit a unique code back in
return
trap
n. an indicator
which, once disturbed, wittingly or unwittingly, alerts those setting
it to an attempted covert entry
tri-bolt
adj.
referring
to a three point locking system usually found on round door safes
tri
spoke
handle
n.
a
safe handle that has 3 extensions off the main hub
trick
lock
n. a lock which requires
successful operation of one or more moving panels, concealed buttons,
etc., often in addition to normal operation by key and/or combination
trim
n.
exposed components of a lockset or latchset, which allow
operation, enhance appearance or provide protection
trim panel
n.
the decorative and functional assembly, which covers the
inside surface of a vehicle, door
triplex
spindle
n.
a spindle with three wedge shaped bars which spread to grip
the inside of the knob shank when the knob set screw is tightened
TRTL-15x6
n. a U.L. rating given to a
container when it has been tested against forcible entry, on all six
sides, with common hand tools and/or abrasive cutting wheels, power
saws, and oxy-fuel gas cutting or welding torch for a period of 15 man
minutes
TRTL-30
n. a U.L. rating given to a
container where the door has been tested against forcible entry with
common hand tools and/or abrasive cutting wheels, power saws, and
oxy-fuel gas cutting or welding torch for a period of 30 man minutes
TRTL-30x6
n. a U.L. rating given to a
container when it has been tested against forcible entry, on all six
sides, with common hand tools and/or abrasive cutting wheels, power
saws, and oxy-fuel gas cutting or welding torch for a period of 30 man
minutes
TRTL-60
n. a U.L. rating given to a
container where the door has been tested against forcible entry with
common hand tools and/or abrasive cutting wheels, power saws, and
oxy-fuel gas cutting or welding torch for a period of 60 man minutes
trunnion
n. the part of a lever lock
that accepts the key and stabilizes it, typically a single piece or an
assembly consisting of some combination of a nose, guide and foot
trunk
lock
n. 1.
a hinged strap with a staple or a lock at the end that mates
with a receptacle in the trunk, 2. a lock designed to secure
the trunk of an automobile
trunkslammer
n. someone who
doesn't have, or want, state-of-the-art capabilities and does shoddy
work
try-out
key
n.
a manipulation key which is usually part of a set, used for a
specific series, keyway, and/or brand of lock
T-strike
n. a strike whose lip spans the
middle portion (but not the full height) of the strike
TTL
abb.
1.
transistor logic, 2. time
to live
tube
n. a hollow
cylindrical pipe passing through a safe or vault door from the lock to
the front of the door
tube
horn
n. a
protrusion designed into the back of a combination lock case for
attachment of the tube
n. a hexagonal nut used to attach the dial ring to
the tube on a safe lock
tubular
key
n.
a key with a tubular blade. The key cuts are made into the
end of the blade, around its circumference.
tubular key
cylinder
n.
a cylinder whose tumblers are arranged in a circle and which
is operated by a tubular key
tubular
lockset
n.
a bored lockset whose latch or bolt locking mechanism is
contained in the component installed into the edge bore
tubular
pick
n. a pick designed to operate a
tubular key lock
tumbler
n.
a movable obstruction of varying size and configuration in a
lock or cylinder which makes direct contact with the key or another
tumbler and prevents an incorrect key or torque device from activating
the lock or other mechanism
tumbler nest
n. a position within a lock
designed to accept a tumbler pack, it typically includes a tumbler
post and a spring rest
tumbler pack
n. a complete set of lever
tumblers for a given lock
tumbler post
n. a rod mounted in a lever
lock, upon which the pivoting ends of the tumblers are in turn mounted
tumbler
separator
n. a thin spacer placed between
lever tumblers to reduce friction
tumbler spring
n.
any spring which acts directly on a tumbler
turn
n.
a
lock, latch or exit device part which is contacted to achieve the
normal operation. It may be a knob, lever or thumb turn.
turn disk
n.
a disk shaped component with a cam actuated by a thumb turn,
normally used in a mortise lock
n.
a
door preparation using six smaller holes around the face bore,
intended to provide for many cylindrical Lever Lock installation
layouts, so named because it resembles a creature of the same name
twisting
tumbler
n. a pin tumbler which must
rotate to a specific position to allow plug rotation
two
column
progression
n.
a process wherein key bittings are obtained by using the cut
possibilities in two columns of the key bitting array
2
in 1 pick
n.
a tool designed to open lever locks where bolt pressure and
lever manipulation are applied simultaneously
two pin master
key
n.
a master key for all combinations obtained by progressing two
bitting positions
two
point
lock
n.
a
lock with two bolts which are thrown and withdrawn simultaneously,
often in more than one direction
two-step
progression
n.
a progression using a two increment difference between
bittings of a given position
TXTL-60
n. a U.L. rating given to a
container where the door has been tested against forcible entry with
common hand tools and/or abrasive cutting wheels, power saws, and
oxy-fuel gas cutting or welding torch and may further include
nitroglycerin or other high explosives for a period of 60 man minutes.
The total quantity of explosives employed may not exceed 8 ounces. Not
more than 4 ounces is to be used in a single charge.
type
1
n. a UL rating given to an
electronic combination lock able to withstand 20 man-hours of expert
manipulation as well as other specifications as listed in UL 2058
type
1F
n. a UL rating given to an
electronic combination lock able to withstand 20 man-hours of expert
manipulation as well as other specifications as listed in UL 2058. The
lock also meets U.S. Federal Specifications FF-L-2740.
type
2
n. a UL rating given to an electronic combination lock able to withstand specifications as listed in UL 2058
© A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
UL
abb.
Underwriters Laboratories
UL
fire
resistive container classifications
class 125
n.
a group of UL classifications for containers that maintain
inside temperatures less than 125 degrees Fahrenheit when exposed to a
fire of specific temperature and duration. The times and fire
temperatures are:
½ hour 1700
degrees F.
1 hour 1700
degrees F.
2 hour 1850
degrees F.
3 hour 1925
degrees F.
4 hour 2000
degrees F.
class 150
n.
a group of UL classifications for containers that maintain
inside temperatures less than 150 degrees Fahrenheit when exposed to a
fire of specific temperature and duration. The times and fire
temperatures are:
½ hour 1700
degrees F.
1 hour 1700
degrees F.
2 hour 1850
degrees F.
3 hour 1925
degrees F.
4 hour 2000
degrees F.
class 350
n.
a group of UL classifications for containers that maintain
inside temperatures less than 350 degrees Fahrenheit when exposed to a
fire of specific temperature and duration. The times and fire
temperatures are:
½ hour 1700
degrees F.
1 hour 1700
degrees F.
2 hour 1850
degrees F.
3 hour 1925
degrees F.
4 hour 2000
degrees F.
UL listed
adj.
listed in a directory as having passed specific Underwriters
Laboratories testing
n.
a
device which utilizes disturbances in sound patterns outside the
audible range to determine movement in a protected area
unassociated
change
key
n.
a change key which is not related directly to a particular
master key through the use of certain constant cuts
unassociated
master
key
n.
a master key which does not have change keys related to its
combination through the use of constant cuts
uncombinated
adj.
1. of or
pertaining to a cylinder which is or is to be supplied without keys,
tumblers and springs, 2. of or pertaining to a lock,
cylinder or key in which the combination has not been set
uncontrolled
cross
keying
n.
a condition in which two or more different keys under
different higher level keys operate one cylinder by design; e.g., XAA1
operated by AB, AB1. Note: This condition severely limits the security
of the cylinder and the maximum expansion of the system, and often
leads to key interchange
v.
a
process that moves a spring loaded tumbler to a point short of the
operating point to form a shear line
unibolt
n. a single plate of steel used
in place of individual multiple bolts to lock a safe door
unidirectional
cylinder
n. a cylinder whose key can turn in only one direction from the key pull position
unit of exit width
n. the breadth allotted per person traveling shoulder to shoulder in a means of egress
USB
key
n. a hardware key connected to a USB port
© A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
n.
a
precut position of an automotive key blank, usually at the tip , that
causes a properly cut key to operate only the ignition and door
valet
key
n. an automotive key that
operates all locks except storage compartments, on a vehicle where
there is also a master key to operate all locks
VATS
abb.
Vehicle Anti‑Theft System
n. a key for some General Motors vehicles which
contains a resistor chip that must be qualified by the vehicle in
order to run
VATS
interrogator
n.
a device which determines the resistor value required to
complete the ignition circuit. It also reads the value of the resistor
in a VATS key.
vault
n. a secure room in which
objects of value are stored
VD
abb.
vertical down
Vehicle
Anti-Theft System
n.
an electronic system in some General Motors vehicles which
uses a resistor pellet of varying value imbedded in a mechanical
ignition key
vertical
down
adj.
of or pertaining to a mounting orientation of a safe or vault
lock such that the bolt projects downward
vertical
group
master key
n.
the two-pin master key for all combinations listed in all
blocks in a line down a page in the standard progression format
vertical
rod
exit device
n.
an exit device with bolts typically at the top and bottom of
a door connected to a central mechanism by rods
vertical
up
adj. of or pertaining to a
mounting orientation of a safe or vault lock such that the bolt
projects upward
VGM
abb.
vertical group master key
virtual
keyway
n.
a
secondary locking mechanism combination used as a method of
discriminating between suppliers for key control
vise
arm
n.
the movable jaw of a key machine vise
vise
nut
n. a nut, with an external
design to facilitate use without tools, that works in conjunction with
the vise stud to tighten the vise on a key machine
vise
stud
n. a threaded post mounted to
the carriage of a key machine to provide a means of tightening the
vise
visual
key
control
n.
a specification that all keys and the visible portion of the
front of all lock cylinders be stamped with standard keying symbols
VKC
abb.
visual key control
VU
abb. vertical up
© A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
n.
1.
a flat tumbler which must be drawn into the cylinder plug by the
proper key so that none of its extremities extends into the shell 2. a
flat, usually rectangular tumbler with a gate which must be aligned
with a sidebar by the proper key
walk-in
vault
n. a vault with a man door and
open floor space inside
wall
safe
n. a safe installed in a wall
so that only the door and a frame is visible
ward
n.
a usually stationary obstruction in a lock or cylinder which
prevents the entry and/or operation of an incorrect key
ward cut
n.
a modification of a key which allows it to bypass a ward
warded
adj.
having one or more wards
warded key
n. a key with ward cuts only,
typically a bit key, flat steel key or corrugated key
Warnock Hersey
n.
an independent testing laboratory
wheel
lock
n.
1. a lock which
prevents rotation of a wheel, 2. a lock which prevents
removal of a wheel
wheel pack
n.
an assembly of combination wheels
wheel puller
n.
a tool used to remove the steering wheel from a column
wide
stile
adj. pertaining to
aluminum and hollow metal or wood doors with stiles 5 inches wide or
larger
window bug
n.
an alarm system component designed to detect breaking glass
wipe
tool
n. 1.
a device used to decode lever lock combinations by an arc
contact with the configured lever/belly characteristic shape,
2. a tool for
cleaning the hidden part of an automotive window to facilitate viewing
of linkage
witness
mark
n. the change in the
surface finish of metal resulting from pressure contact, as in
impressioning
working
trim
n. lock or exit device trim which activates a mechanism
© A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
X
sym. symbol used in hardware schedules to indicate a cross-keyed condition for a particular cylinder; e.g., XAA2, XlX (but not AX7)
X-type – see straight tailpiece (lock)
Yale,
Linus,
Jr.
The
American
inventor of the pin tumbler mortise lock and its replaceable cylinder
component.
yoke
n.
a component designed to secure cylinders or turn disks in
both sides of a mortise lock by means of a single setscrew
yoked
n.
a
mechanical system uniting two or more combination locks with the
ability to be unlocked by any lock or a series of locks
Z-wire
n. 1.
a wire bypass tool with two opposing right angle bends, for
retracting a spring latch, 2. a wire tension wrench for
the control lug in certain IC padlocks
zero
bitted
adj.
of or pertaining to a cylinder which is or is to be
combinated to keys cut to the manufacturer's reference number "0"
bitting
APPENDIX
FOR: |
SEE: |
A, AA, AA1, 1AA, etc. |
key symbol |
A, AA, AA1, 1AA, etc |
keying symbol |
A, AA, AA1, 1AA, etc |
standard key coding system |
Ace type key |
tubular key |
Ace type cylinder |
tubular key cylinder |
active door |
active leaf |
active guard key |
guard key |
active renters key |
renter's key |
across-the-key-progression |
total position progression |
actuating bar |
crash bar |
adjacent cut differential |
maximum adjacent cut specification |
angle of cut |
degree of rotation |
anti‑shim |
deadlocking |
apartment entrance |
vestibule function |
architectural finish |
architectural finish code |
armored front |
face plate |
ASA |
ANSI |
ASA strike |
ANSI 115.2 strike |
automatic dialer |
dialer |
automatic extension flush bolt |
automatic flush bolt |
auxiliary bolt |
auxiliary lock |
convenience key |
reversible key |
auxiliary relocker |
external relocking device |
back of blade |
bottom of blade |
backed off blade |
radiused blade bottom |
ball bearing locking |
ball locking |
ball detainer |
ball bearing |
ball end pin |
bottom pin |
barrel |
plug |
Basic Building Code |
BOCA |
belly (British) |
sweep |
bitting width |
included angle |
blade tumbler |
disc tumbler |
blocking ring |
cylinder collar |
blockout key |
lockout key |
body puller |
slide hammer |
bogus key blank |
non‑original key blank |
bolt stump (British) |
fence |
bolt thrower (British) |
foot |
bond tin |
bond box |
bootleg key blank |
non‑original key blank |
bridge |
bridge ward |
broken key extractor |
key extractor |
builders' hardware |
architectural hardware |
builders master key |
construction master key |
bullet (British) |
keyway ward |
bullet (British) |
ward cut |
burglar proof |
burglar resistant |
burning bar |
thermal lance |
butt hinge |
full mortise hinge |
bypass combination |
override combination |
carriage bar |
carry bar |
captive key |
NRK, non-removable key |
case cap |
case cove |
case cap |
face cap |
cell |
pin chamber |
central key system |
maison key system |
chain door lock |
chain lock |
chain key system |
selective key system |
change key constant |
constant cut |
change key section |
single key section |
change tool |
change key #2 |
chart |
pinning chart |
chart |
progression list |
chart |
bitting list |
chart |
key system schematic |
check |
door closer |
chip |
master pin #1 |
chip key |
PATS key |
chip key |
transponder key |
chip key |
VATS key |
CICC |
contactless smart card |
circular face |
drive‑in |
code |
combinate |
code list |
bitting list |
code list |
progression list |
code machine |
key coding machine |
code number |
Blind code |
code number |
direct code |
collar ward |
throat ward |
column master key |
vertical group master key |
combinant lever |
changeable lever |
combined coding system |
hybrid locking system |
common keyed |
maison key system |
common keyed |
cross keyed |
common keyed |
cross keying |
compressor wheel |
pressure bar wheel |
connecting bar |
tailpiece |
contactless integrated circuit card |
contactless smart card |
control pin |
build‑up pin |
conversion code |
substitution code |
copy dog |
tracer |
core key |
Control Key |
counterfeit key blank |
non‑original key blank |
curved pick |
hook pick |
cut depth |
bitting depth |
cut depth |
root depth |
cut profile |
key cut profile |
cut rotation |
degree of rotation |
cylinder assembly |
cylinder |
cylinder assembly tool |
plug follower |
cylinder bar |
tailpiece |
cylinder hull |
shell |
cylinder plug |
plug |
cylinder ring |
cylinder collar |
cylinder rose |
cylinder collar |
cylinder shell |
shell |
D-ring |
drop ring |
data safe |
media safe |
day key |
change key #1 |
dayguard key lock |
daylock #1 |
deadlatch finger |
guard bolt |
deadlatch pin |
guard bolt |
deadlatching trigger |
guard bolt |
deadlatch |
deadlocking latch |
deadlocking plunger |
guard bolt |
dent puller |
slide hammer |
depth |
bitting depth |
depth |
root depth |
derived code |
derived series |
detainer disc |
rotary disc tumbler |
dial flange |
dial ring |
dial pin |
drive pin |
dial shield |
spy proof dial ring |
disc |
disc tumbler |
disc |
master pin #1 |
disc |
rotary disc tumbler |
disc tumbler |
wafer tumbler |
divided bolt |
split bolt |
dog bolt |
hinge security stud |
Dongle |
hardware key |
door check |
door closer |
door coordinator |
coordinator |
double bolt lock |
split bolt |
double custody |
dual custody |
double nose |
double horn |
double sided key |
double bitted key |
driver post |
keyway post |
drop arm |
lever (combination lock) |
drop bottom combination lock |
open bottom combination lock |
drop escutcheon |
drop |
drop escutcheon |
drop |
duplicate blank |
non-original key blank |
duplicate blank |
non-original key blank |
dust cap |
dust cover |
encode |
combinate |
entrance ward |
side ward |
fail secure |
non-fail safe |
false plug |
plug follower |
file key |
pattern key |
finger lock |
drop bolt |
finish builders hardware |
architectural hardware |
floating master key |
unassociated master key |
floating master key |
selective master key |
floor check |
floor closer |
floor check |
floor closer |
floor hinge |
floor closer |
follower |
plug follower |
following tool |
plug follower |
fly talon |
fly |
formula |
key bitting array |
Fox Police Lock |
brace lock |
full size interchangeable core |
large format interchangeable core |
gauge key |
depth key set |
gauge key |
set-up key |
genuine key blank |
original key blank |
ghost key |
incidental master key |
grand master key section |
all-section key blank |
grand master key section |
multi-section key blank |
grooving |
key milling |
guarded latch |
deadlocking latch |
guide keys |
depth key set |
half diamond pick |
diamond pick |
half rebate (British) |
half mortise |
hold and vary |
rotating constant method |
hollow post key |
barrel key |
hose house padlock |
frangible shackle padlock |
hull |
shell |
I-core |
IC |
IC core |
IC |
ICC smart card |
Integrated Circuit smart card |
identification carrier |
credential |
imitation blank |
non-original key blank |
incidental master key |
incidental key |
indirect code |
blind code |
inner cylinder |
pop out cylinder |
interchange |
key interchange |
internal release |
emergency escape mechanism |
jiggle key |
manipulation key |
key bushing |
trunnion |
key bypass |
key override |
key carriage |
carriage |
key change number |
blind code |
key change number |
direct code |
key change number |
key symbol |
key changes |
practical key changes |
key changes |
theoretical key changes |
keying chart |
pinning chart |
keying chart |
progression list |
keying chart |
bitting list |
keying chart |
key system schematic |
key insert |
knock-out tag |
key picking |
key manipulation |
key pilot |
dimple #1 |
key pin |
bottom pin |
keying diagram |
key system schematic |
keying levels |
levels of keying |
keyset |
key symbol |
keyset |
keying symbol |
keyway identifier |
key section identifier |
keyway shroud |
dust cover |
keyway shroud |
drop |
keyway post |
guide #2 |
keyway shutter |
dust cover |
knob hub |
hub" #1 |
knob latch |
latch |
knob shank |
shank |
knob rose |
rose |
KR |
NRK, non-removable key |
laser key |
sidewinder key |
latch case |
active case |
layout board |
layout tray |
leftshoot (British) |
LH |
level (of a cut) |
bitting depth |
level (of a cut) |
root depth |
lever |
lever tumbler |
lever |
lever handle |
locating arm |
stop gauge |
local code precedence |
Authority Having Jurisdiction |
lock bevel |
bevel (of a lock) |
lock face |
face |
lock trigger |
relocking device |
locked removal |
key retaining |
locking lug |
locking dog |
locking pin mechanism |
monitor pin |
locking rod |
linkage |
maintenance master key |
engineer’s key |
master |
master key #1 |
master blank |
multi-section key blank |
master blank |
all-section key blank |
master chip |
master pin |
master key constant |
constant cut |
master key section |
multi-section key blank |
master key section |
all-section key blank |
master keying |
master key #2 |
maximum adjacent cut differential |
maximum adjacent cut specification |
Mikey chart |
mykey chart |
milling (of a key) |
key section |
milling (of a key) |
key milling |
mono lock |
pre-assembled lockset |
mortise bolt |
one-way deadbolt |
mortise cylinder blank |
cylinder blank |
moveable constant |
rotating constant |
mushroom driver |
mushroom pin |
NLSA |
SHDA |
nose post |
guide #2 |
NR-key |
non-removable key |
O bitted |
zero bitted |
on-board computer |
ECM |
open code |
direct code |
open ended (British) |
open gated |
original key |
factory original key |
original key |
factory original key |
original key |
code original key |
panic bar |
exit device |
patent motion component |
movable key insert |
peg ward (British) |
end ward |
phantom key |
incidental master key |
pin cell |
pin chamber |
pin (of a key) (British) |
post (of a key) |
pin segment |
pin tumbler |
pin set |
see "set" |
pin tray |
layout tray |
pinning | combinate; set |
pipe key (British) |
barrel key |
pivot hinge |
pivot |
pivot hinge |
pivot |
plug iron |
plug follower |
plug iron |
set-up plug |
plug set-up chart |
pinning chart |
plug vise |
plug holder |
plunger |
guard bolt |
pot model |
traditional closer |
powered head key |
remote head key |
pressure bar(s) |
pressure system |
primary sidebitted |
sidewinder key |
prison lock |
detention lock |
privacy set |
privacy function |
profile |
key section |
profile |
keyway #2 |
program key |
reset key #1 |
progression formula |
sequence of progression |
progression sequence |
sequence of progression |
protected keyway |
protected key |
pull key |
Control Key |
pull ring |
drop ring |
pullout key |
declining step key |
push lock |
plunger lock |
puzzle lock |
trick lock |
quadrant master key |
four pin master key |
quadrant master key |
four pin master key |
rabbeted bolt |
rabbeted lock |
rabbeted latch |
rabbeted lock |
recode |
recombinate |
rectangular face latch |
round cornered latch |
rectangular face latch |
square cornered latch |
relock |
relocking device |
relock hold down pin |
shipping pin |
relock stud |
relock pin |
relocker |
relocking device |
remote release |
remote |
reserved |
restricted |
reset |
recombinate |
retainer |
plug retainer |
reverse keeper |
reverse strike |
rightshoot (British) |
RH |
rocker key |
manipulation key |
root of cut |
cut root |
rosette |
rose |
round face |
drive-in |
safe head |
safe door, lift out |
safety deposit |
safe deposit |
safety factor |
maximum adjacent cut specification |
sample key |
pattern key |
sash ward (British) |
end ward |
scalp |
face plate |
school house function |
classroom function |
schematic |
key system schematic |
sectional key blank |
multiplex key blank |
sectional keyway system |
multiplex key system |
sectional spindle |
split spindle |
selvedge |
face |
sex nut |
sex bolt |
shaved blade |
radiused blade bottom |
shedding key |
declining step key |
shoulder gauge |
stop gauge |
shoulder guide |
guide #1 |
Side Plate Lock |
|
skew |
degree of rotation |
slam hammer |
slide hammer |
slide |
spring cover |
sliding lever |
slider |
slip gauge |
key gauge |
snib |
thumb stop |
split pin |
master pin #1 |
spring bolt |
latch |
spring bolt |
automatic deadbolt |
spring latch |
simple latch |
spring latch |
latch |
stack height |
pin stack height |
stem |
shank |
step |
increment |
step tolerance |
maximum adjacent cut specification |
strike box |
dust box |
strike plate |
strike |
striker |
strike |
stump (of a bolt) (British) |
fence |
sub-assembled |
uncombinated #1 |
surface exit device |
rim exit device |
system code |
virtual keyway |
table nut |
tube nut |
template keys |
depth key set |
thermic cutter |
thermal lance |
thimble |
plug holder |
threaded cylinder |
mortise cylinder |
throat |
throat ward |
thumb turn disc |
turn disc |
tip ward cut |
end ward cut |
tip ward needle |
post (of a lock) |
toothed |
serrated |
torque blade |
tailpiece |
total stack height |
pin stack |
trigger |
guard bolt |
trim ring |
cylinder collar |
trim ring |
rose |
tumbler wheel |
combination wheel |
turning tool |
tension wrench |
turning wrench |
tension wrench |
uncoded |
uncombinated |
unit lock |
pre-assembled lockset |
universal keyway |
composite keyway |
upshoot (British) |
VU |
utility lock |
cam lock |
vice arm shaft |
vice stud |
wafer |
master pin #1 |
wheel |
combination wheel |
wheel post |
post (of a lock) #2 |
wheel ward (British) |
end ward |
wiggle key |
manipulation key |
wing |
bit #1 |
wing key |
bit key |