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| (n.) A classification by Underwriters Laboratories for doors with 1 1/2 hour rated fire protection. |
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| (n.) A thin piece of metal, usually with a concave portion, used with machine screws to fasten certain types of cylinders to a door. |
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| (n.) The resistance provided by a door closer as a door is opened. |
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| (n.) The distance between the center of a cross bore and the bolt edge of a door or drawer. |
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| (n.) A device or devices designed to deter the retrieval of items through a depository opening. |
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| (v.) To dial a combination 1 number high and 1 number low to verify a correct combination setting. |
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| (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. |
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(n.) 1. A metal ball used in the pin stack to accomplish some types of hotel or construction keying.
(n.) 2. A ball, usually made of steel, used by some lock manufacturers as the bottom element in the pin stack in one or more pin chambers.
(n.) 3. Any metal ball used as a tumbler's primary component.
(n.) 4. Used as a means of repairing a drilled hole in a safe when welded in place. |
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| (n.) A hardplate that contains metal balls, typically two types, imbedded in a honeycomb pattern, or free moving within a hardplate envelope. |
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| (n.) A latch which uses spring pressure to force a ball bearing into a recess in its strike. |
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| (adj.) A method of locking a padlock shackle into its case using ball bearing(s) as the bolt(s). |
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| (n.) An access control system credential consisting of magnetized ferrite embedded in a plastic card with polarity and location being important features. |
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| (n.) A surface mounted slide bolt which has a cylindrical shape. |
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| (n.) A type of bit key with a hole drilled into the shank from the tip. |
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| The Englishman credited with the invention of the double acting lever tumbler in 1778. |
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| (n.) Former name for BOCA National Building Code. |
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| (n.) An electric device designed to provide energy to equipment normally requiring batteries for operation. |
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| (abb.) Basic Building Code |
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| (n.) The protective enclosure for a bell or other alarm sounding device. |
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| (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. |
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| (n.) The pitch on the leading edge of a door which allows clearance for closing. |
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| (n.) The pitch of the face designed to match the bevel of a door. Some locks have an adjustable bevel. |
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| (n.) A threaded collar commonly used to secure certain cylinder or lock assemblies. |
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| (abb.) Builders Hardware Manufacturers Association |
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| (n.) A cylinder which may be operated in a clockwise and counterclockwise direction by a single key. |
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| (n.) A door with two or more sets of hinges, the additional set(s) allows the door to have an accordion action when opened. |
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| (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. |
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| (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. |
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| (n.) A padlock with sufficient shackle clearance to secure a bicycle. |
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| (n.) Typically a key that can operate two compatible mechanisms which have different security features. |
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| (n.) A key whose combination only allows for two possibilities in each bitting position: cut/no cut. |
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| (n.) A cylinder or lock whose combination only allows for two bitting possibilities in each bitting position. |
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| (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. |
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(n.) 1. The part of the key which serves as the blade, usually for use in a warded or lever tumbler lock.
(v.) 2. To cut a key.
(n.) The part of a key that enters the lock and engages the bolt and tumblers. |
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(n.) 1. The distance between two different shear lines, as expressed in units of the manufacturer's increment or as an actual measurement.
(n.) 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. |
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| (n.) The additional element of a pin stack required to allow operation at different shear lines in a cylinder. |
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| (n.) A master key which operates all or most master keyed looks in a given building. |
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| (n.) A friction catch with a projecting latch which is spherical or dome shaped. |
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| (n.) A cut key, cut to allow the user to replicate the action of a pick gun. |
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| (n.) A system designed to detect and report conditions which may indicate intrusion or attempted intrusion. |
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| (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. |
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| (n.) The knob in a key-in-knob lock that includes a push or turn button. |
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| (n.) A device that neutralizes the security of a locking device, or its application hardware, often taking advantage of a design weakness. |
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| (n.) A lock with a bolt that extends to block parallel movement of another door. |
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| (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. |
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| (n.) The key which operates a key override cylinder. |
