Locksmith Glossary - A


Source: Lock Industry Standards and Training (LIST) Council

A2
An increment of .0125 typically used in a small format interchangeable core (SFIC).

A3
An increment of .018 typically used in a small format interchangeable core (SFIC).

A4
An increment of .021 typically used in a small format interchangeable core (SFIC).

Access Control
Any barrier or device, either natural or man made, that limits or prohibits, free or unlimited access.

Access Control Cylinder
A replacement for a mechanical cylinder which incorporates electronic access control and allows the original host lock to function without additional wiring or hardware modifications.

Access Control Key Fob
Any device other than a key designed to allow a token to be used and carried on a key ring.

Accessory Position
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
The exit device case mounted on the stile of the door on which the lock is located.

Active Leaf
The single door of a pair on which the active or locking hardware is mounted.

Active Relocking Device
A device that places its bolts every time a safe door is closed and activation via attack prevents it from retracting its bolts.

Active Retainer
1. A cylinder retaining mechanism which requires that the plug be rotated before the cylinder can be removed
2. A plug retaining mechanism which requires that the plug be rotated before the retainer can be removed

Actuator
A device, usually connected to a cylinder, which, when activated, may cause a lock mechanism to operate.

ADA
Americans with Disabilities Act

Adjustable Ball Hinge
A pivot with adjustable height for narrow stile doors.

Adjustable Collar
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
Any mortise cylinder whose length can be adjusted for a better fit in doors of varying thickness.

AED
Anti-Explosive Device

AFTE
Association of Firearm and Toolmark Examiners

After Hours Depository
A locked receptacle for the deposit of items after regular hours.

AHC
Architectural Hardware Consultant (as certified by DHI)

AHD
After Hours Depository

AHJ
Authority Having Jurisdiction

Alarm System
A system of electrical and/or electronic components which detect and report dangers, such as fire or intrusion.

Aligning Tube
1. A lock component which orients and joins the latch and knob spindles of certain bored locksets.
2. In some combination locks, a tube which houses the spindle, located between the dial ring and the lock.

All-Section Key Blank
The key section which enters all keyways of a multiplex key system.

ALOA
Associated Locksmiths of America, Inc.

Americans with Disabilities Act
A US federal law dealing with minimum standards of building accessibility, as well as other issues concerning individuals with disabilities.

Angularly Bitted Key
A key which has cuts made into the blade at various degrees of rotation from the perpendicular.

ANSI
American National Standards Institute

ANSI 117.1
That section of the American National Standards Institute documents pertaining to handicap access.

ANSI Strike
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".

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-Friction
(adj.) Pertaining to a feature which, upon contact with the strike, allows smoother operation of a latch bolt.

Anti-Rap
(adj.) Specifically designed to preclude bypass via attack based on sharp, repetitive blows to the mechanism.

Anti-Wrench Reinforcement Spring
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
The threaded end of a safe door handle.

Architectural Finish Code
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
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.

Arm (of a Closer)
Door closer linkage which connects the closer to the frame or door, depending on the mounting style.

Armored Escutcheon
A usually hardened escutcheon, typically beveled, that resists physical attack.

Armored Face Plate
A face plate that conceals all lock and/or cylinder mounting screws.

ASIS
American Society for Industrial Security

Assembly Occupancy
Those buildings or areas which are designated as places of assembly according to life safety or building codes.

Associated Change Key
A change key which is related directly to particular master key(s) through the use of constant cuts.

Associated Master Key
A master key which has particular change keys related directly to its combination through the use of constant cuts.

ASTM
American Society for Testing and Materials

Astragal
A molding attached to the face of the active leaf of a pair of doors and overlapping the inactive leaf.

ATM
Automatic Teller Machine

ATT
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
A selective master key used in a hospital keying system.

Audit Overrun
A means of attack designed to eliminate entries in an access control database, overfilling and scrolling off previous entries.

Audit Trail
A specific group of events selected from transaction records and listed sequentially.

Authority Having Jurisdiction
That person, usually within a municipality, charged with the application and interpretation of local life safety 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
A deadbolt designed to extend itself fully when the door is closed.

Automatic Flush Bolt
A flush bolt designed to extend itself when both leaves of the pair of doors are in the closed position.

Automatic Key Machine
A machine capable of cutting keys with manual operations limited to loading and unloading keys.

Automatic Teller Machine
A device for dispensing cash, receiving deposits and performing other banking functions upon presentation of the proper authorization.

Auxiliary Lock
Any lock installed in addition to the primary lockset.

Auxiliary Spring
A secondary spring used to support the lever handles of a lockset.

Auxiliary Spring Rose
Oversized trim that interlocks with a lock chassis and external lever as a means to mount an auxiliary spring.
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