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 G L O S S A R Y O F T E R M S 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 All Active Door (in a pair of doors) The leaf that opens first and the one to which the lock is applied.
AHC Indicates that the individual so identified is a qualified Architectural Hardware Consultant and member of the Door and Hardware Institute.
Anti-Friction Bearing Any bearing having the capability of effectively reducing friction.
Anti-Friction Latch Bolt A latch bolt designed to reduce friction when the bolt starts to engage the lock strike.
Architectural Hardware Term applied to all hardware used in building construction but particularly that used on or in connection with doors, windows, cabinets and other movable members.
Armored Front A lock that consists of two plates: one, the under plate, is fastened to the case and is unfinished; two, the finish plate, is fastened to the under plate and when in place covers the cylinder set screws thus protecting them from tampering. Used on mortise locks.
Armor Plate A plate similar to a kick plate but covering the door to a greater height, usually 40" (1 040mm) or more from the bottom.
Astragal A molding or strip whose purpose is to cover or close the gap between the edges of a pair of doors. Some types overlap, others meet at the center line of the gap. (See Coordinator.)
Auxiliary Dead Latch A supplementary latch that automatically deadlocks the main latch bolt when the door is closed. (Also called Deadlocking Latch Bolt.)
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