a device usually connected to a cylinder. When activated may cause a lock mechanism to operate.
Aligning tube
a lock component which orients and joins the latch and knob spindles of certain bored locksets. In some combination locks, a tube which houses the spindle, located between the dial ring and the lock.
ANSI strike
strikes designed to fit door and frame preparations as specified in the applicable document in the ANSI Al 15 series. Common usage refers to a strike with dimensions of 4-7/8" X 1-1/4".
Back plate
a thin piece of metal, usually with a concave portion. Used with machine screws to fasten certain types of cylinders to a door.
Ball Bearing
a metal ball, usually made of steel, used in the pin stack to accomplish some types of hotel or construction keying. May be used by some lock manufacturers as the bottom element in the pin stack in one or more pin chambers. Any metal ball used as a tumbler's primary component.
Barrel bolt
a surface mounted slide bolt which has a cylindrical shape.
Battery eliminator
an electric device designed to provide energy to equipment normally requiring batteries for operation.
a threaded collar commonly used to secure certain cylinder or lock assemblies.
Bi-directional cylinder
a cylinder which may be operated in a clockwise and counterclockwise direction by a single key.
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
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.
Binary type cylinder or lock
a cylinder or lock whose combination only allows for two bitting possibilities in each bitting position.
any movable projection which blocks the movement of one object relative to another.
Boltwork button
the component which automatically triggers extension of the locking bolt when the door is in the closed position.
Bottom pin
usually a cylindrical shaped tumbler which may be conical, ball shaped or chisel pointed on the end which makes contact with the key.
Box of wards
a complete unit of intricate wards installed in or on a lock case.
Box strike
a strike equipped to line the bolt cavity for both aesthetic and protective purposes.
Bridge ward
a center ward attached to the interior of a lock by means of a bracket.
Build-up pin
the additional element of a pin stack required to allow operation at different shear lines in a cylinder.
a lock or cylinder component which transfers the rotational motion of a key or cylinder plug to the bolt works of a lock. The bolt of a cam lock.
a spring cover for a single pin chamber. A part which may serve as a plug retainer and/or a holder for the tailpiece. Also the act of installing a cap.
Capping block
a holding fixture for certain interchangeable cores which aids in the installation of the caps.
the housing or body of a lock.
Case cap
the scalp of an automotive cylinder.
Case cover
the portion of a lock case which is designed to be removable to allow access to the mechanism.
Case ward
any ward directly attached to or projecting from a lock case.
any cavity in a cylinder plug and/or shell which houses the tumblers.
Claw bolt
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
a portal providing clearance through which passage is unhampered.
a device to permanently attach a chain to a padlock.
the part of a profile cylinder that transfers rotational motion from the inside or outside element to a common cam or an actuator.
Construction core
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.
Control chamber
in an interchangeable or removable core, any chamber which has a control shear line which is different from the operating shear line.
Control lug
the part of an interchangeable or removable core retaining device which locks the core into its housing.
Control sleeve
the part of an interchangeable or removable core retaining device which surrounds the plug.
in conjunction with a pair of doors, a device designed to cause the inactive leaf to close first.
Corner bracket
a door closer mounting plate attached to the upper corner of the jamb
Disc tumbler
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. A flat, usually rectangular tumbler with a gate which must be aligned with a sidebar by the proper key.
Double acting hinge
a hinge which permits movement of a door in either direction from the closed position.
Double-acting lever tumbler
must be lifted a precise amount, neither too little nor too much to allow movement of a bolt.
Driver spring
a spring placed on top of the pin stack to exert pressure on the pin tumblers.
a pivoting or swinging dust cover.
Dust box
an enclosure applied under a strike to enhance appearance and/or performance.
Dust cover
a device designed to prevent foreign matter from entering a mechanism through the keyway.
Ejector hole
a hole found on the bottom of certain interchangeable cores under each pin chamber. It provides a path for the ejector pin.
a surface mounted trim which enhances the appearance and/or security of a lock installation.
the finished component of a lock visible on the edge of a door.
Face plate
the finished, removable plate which covers the front of some locks.
a projection on a lock bolt which prevents movement of the bolt unless it can enter gates of properly aligned tumblers. Also any locking element other than a sidebar or shackle designed to enter a tumbler's gate.
the cam portion of the trunnion assembly in some lever tumbler locks.
the portion of a lock which provides the means for mounting the locking device to the edge of the door.
a notch cut into the edge of a tumbler to accept a fence or sidebar.
Graduated drivers
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.
Guard bolt
a spring loaded bolt which, when activated, will deadlock a latch bolt.
Half-mortise hinge
a hinge which has one leaf mortised into the door and the second leaf attached to the surface of the frame.
a hinged metal strap designed to be passed over a staple and secured in place.
Heel (of a padlock shackle)
the part of a padlock shackle which is retained in the case when in the unlocked position.
High security cylinder
a cylinder which offers a greater degree of resistance to any or all of the following: picking, impressioning, key duplication, drilling or other forms of forcible entry.
Hinge security stud
a protrusion on one leaf of a hinge which interlocks with the other when the door is closed.
Hinged shackle
a shackle whose heel is permanently mounted to the padlock case in a manner which allows the shackle to pivot open.
Hobbs shackle
a hinged shackle with a notch for the bolt in its movable end.
Hold open arm
a door closer arm with the capability of maintaining the door in the open position.
Hold open cylinder
a cylinder provided with a special cam which will hold a latch bolt in the retracted position when set that way by the key.
Hollow driver
a top pin hollowed out on one end to receive the spring, typically used in cylinders with extremely limited clearance in the pin chambers.
Hook bolt
a lock bolt shaped in the general outline of a hook. Normally used on sliding doors or where the spreading of the frame and door is open to a possible attack.
Horizontal locking
the locking mechanism associated with vehicle doors with horizontal linkage.
in a non-cylinder lock, the housing which surrounds the nose and extends through the door or drawer.
Horn plate
the cover of a lever tumbler lock case to which the horn is attached.
Hospital hinge
a hinge with a large chamber at each end of the knuckle.
that part of a locking device which is designed to hold a core.
a lock component which redirects rotational motion from a spindle or shaft to linear movement of a latch or bolt.
Ignition key release
a button or other actuator which must be pushed before a vehicle's ignition key may be turned to the withdrawal position.
Ignition lock
the lock assembly associated with a vehicle's engine on-off switch and starter.
Interchangeable core
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.
Interlocking bolt
a bolt which interlocks with its strike when fully engaged.
Interlocking pin tumbler
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.
the vertical components of a door frame.
the movable portion of an electric strike which captures the bolt.
Key override cylinder
a lock cylinder installed in a device to provide override function.
Key trap core/cylinder
a special core or cylinder designed to capture any key to which it is combinated, once that key is inserted and turned slightly.
Key-in-knob cylinder
a cylinder used in a key-in-knob lockset.
the opening through which a non-cylinder key must pass to enter a lock.
Keyhole plate
an escutcheon for a keyhole keying.
the opening in a lock or cylinder which is shaped to accept a key bit or blade of a proper configuration. 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
the projecting pin of a lock or cylinder which enters the hollow end of a key.
Keyway unit
the plug of certain binary type disc tumbler key-in-knob locks.
Keyway ward
a ward which prevents entry of an incorrect key into a cylinder or lock.
Kick plate
a protective plate mounted on the bottom of a door to minimize damage to the door.
Latch bolt
a spring actuated bolt, normally with one or more beveled surfaces which when aligned with the strike, engages it automatically.
Lazy cam/Tailpiece
a cam or tailpiece designed to remain stationary while the cylinder plug is partially rotated and/or vice-versa.
Lever tumbler
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.
Locking lug
a fixed component of a safe which locks the safe door in place in the locked position.
Locking lug nut
a lug nut which requires the use of a key or special wrench.
Master lever
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
usually a cylindrical shaped tumbler, flat on both ends, placed between the top and bottom pin to create an additional shear line. A pin tumbler with multiple gates to accept a sidebar.
Master ring
a cube 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
a lock or cylinder equipped with a master ring.
Master wafer
a ward used in certain binary type disc tumbler key-in-knob locks, see also "master pin" and "stepped tumbler".
Mogul cylinder
a very large pin tumbler cylinder whose pins, springs, key, etc. are also proportionally increased in size. It is typically used in prison locks.
Mortise cylinder
a threaded cylinder typically used in mortise locks of American manufacture.
Mushroom pin
a pin tumbler, usually a top pin, which resembles a mushroom. It is typically used to increase pick resistance.
Night latch
a rim mounted auxiliary latch bolt.
Non-removable pin
pertaining to a hinge whose pin cannot be removed when the door is closed.
the part of a non-cylinder lock which contains the keyway and rotates without a horn.
One bitted
of or pertaining to a cylinder which is or is to be combinated to keys cut to the manufacturer's reference number one bitting.
Open gated
pertaining to a lever tumble whose gate is in the edge of the tumbler.
the set of tumblers in a lever tumbler or combination lock.
the cam of certain automotive cylinders.
Peanut cylinder
a mortise cylinder of 3/4" diameter.
Pin chamber
the corresponding hole drilled into the cylinder shell and/or plug to accept the pins and spring.
Pin kit
a type or keying kit for a pin tumbler mechanism.
Pin stack
all the tumblers in a given pin chamber.
Pin stack height
the measurement of a pin slack, often expressed in units of the lock manufacturer's increment or as an actual dimension.
Pin tumbler
usually a cylindrical shaped tumbler. Three types are normally used: bottom pin, master pin and top pin.
to install pin tumblers into a cylinder an/or cylinder plug.
Pinning block
a holding fixture which assists in the loading of tumblers into a cylinder or cylinder plug.
the part of a cylinder which contains the keyway, with tumbler chambers usually corresponding to those in the cylinder shell.
Plug holder
a holding fixture which assists in the loading of tumblers into a cylinder plug.
Plug retainer
the cylinder component which secures the plug in the shell.
Profile cylinder
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.
Pullman latch
a type of latch which pivots like a hinge and whose locking side is radiused.
Removable core
a key removable core which can only be installed in one type of cylinder housing; e.g., rim cylinder, mortise cylinder or key-in-knob lock.
Removable cylinder
a cylinder which can be removed from a locking device by a key and/or tool.
to replace pin tumblers, with or without changing the existing combination.
a component which is clipped or staked in place to maintain the working relationship of other components.
Rim cylinder
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.
a typically circular escutcheon.
Rotary tumbler
a circular tumbler with one or more gates. Rotation of the proper key aligns the tumbler gates at a sidebar, fence or shackle slot.
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.
Secret gate latch
a small keyless rim latch, which when properly installed, is operated pressing a concealers actuator.
Security collar
a protective cylinder collar.
Segmented follower
a plug follower which is sliced into sections which arc introduced into the cylinder shell one at a time. It is typically used with profile cylinders.
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. The portion of a restraint which fits around the wrist, ankle, neck, waist or thumb.
Shackle retaining pin
a pin which keeps an unlocked shackle heel in the case.
Shackle spring
a spring which pushes the shackle into the open position when the padlock is unlocked.
Shear line
a location in cylinder at which specific tumbler surfaces must be aligned, removing obstructions which prevented the plug from moving.
the part of the cylinder which surrounds the plug and which usually contains tumbler chambers corresponding to those in the plug.
any key stop other than a tip stop.
Shouldered pin
a bottom pin whose diameter is larger at the flat end to limit its penetration into a counter-bored chamber.
Shrouded shackle
a shackle which is protected from cutting or tampering by design or by the use of secondary shields.
a spring loaded device which closes upon the removal of a cylinder tailpiece, protecting a locking device from being manipulated. 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.
Side ward
a ward which prevents entry of an incorrect key into a non-cylinder lock.
a cylinder component which enters the gate into the tumbler to allow plug rotation.
Sidebar lock
a lock mechanism which incorporates a sidebar.
Simple latch
a non-deadlocking latch.
Single-acting lever tumbler
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.
a tumbler which is normally flat, has a gate and moves with a linear or lateral motion instead of pivoting like a lever tumbler.
Special application cylinder
any cylinder other than a mortise, rim, key-in-knob or profile cylinder.
a component which transfers rotary motion from outside a lock or latch case to an inner mechanism.
Spool pin
usually a top pin which resembles a spool, typically used to increase pick resistance.
Spring seat
the point at which a spring is anchored, located or attached and from which it exerts force.
Step pin
a spool or mushroom pin which has 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.
Stop works
a button or toggle mechanism which prevents operation of a knob, lever or thumbpiece in a non-bored lock.
Swing clear hinge
a hinge that allows the door to swing far enough away from the jamb to fully clear the opening at 90 degrees when open.
Swivel spindle
normally a two-piece spindle assembly whose two halves are designed to turn independently.
a T-shaped handle assembly which may be lockable.
an actuator attached to the rear of the cylinder, parallel to the plug. Typically used on rim. key-in-knob or special purpose cylinders.
Telescoping column
a steering column adjustable for length.
Template hinge
a hinge with dimensions, hole locations and tolerances which conform to ANSI standard A 156.7.
Threaded rose
a rose with an internally threaded ferrule.
Three point latch
a self-latching device designed to latch a door at the top, bottom and edge.
Throw turn cylinder
a cylinder with a turn knob rather than a keyway and tumbler mechanism.
Toe (of a shackle)
that part of the shackle which may be removed from the padlock body.
Top pin
usually a cylindrical shaped tumbler, usually flat on both ends and installed directly under the spring in the pin stack.
exposed components of a lockset or latchset which allow operation, enhance appearance or provide protection.
Triplex spindle
a spindle with three wedge shaped bars which spread to grip the inside of the knob shank when the knob set screw is tightened.
Tubular key cylinder
a cylinder whose tumblers are arranged in a circle and which is operated by a tubular key.
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 torquing device from activating the lock or other mechanism.
Tumbler spring
any spring which acts directly on a tumbler.
Turn disk
a disk shaped component with a cam actuated by a thumb turn, normally used in a mortise lock.
Unidirectional cylinder
a cylinder whose key can turn in only one direction from the key pull position, often not making a complete rotation.
a usually stationary obstruction in a lock or cylinder which prevents the entry and/or operation of an incorrect key.
a component designed to secure cylinders or turn disks in both sides of a mortise lock by means of a single set screw symbol used in hardware schedules to indicate a cross keyed condition for a particular cylinder; e.g., XAA2, XIX (but not AX7).
Zero bitted
of or pertaining to a cylinder which is or is to be combinated to keys cut to the manufacturer's reference number "0" bitting.