CĬabinet lock A generic term to include all locks of any type for use on pieces of furniture, such as cupboards, drawers, chests, boxes and the like.Ĭam Usually a tongue fixed to the end of the plug of a cylinder lock or latch.Ĭam lock A complete locking assembly in the form of a cylinder whose cam is the actual locking bolt.Ĭap (of the lock) The removable cover to a lock mechanism.Ĭasement Door A hinged door or pair of doors almost wholly glazed often called a French Window.Ĭasement Window A window in which one or more lights are hinged to open.Ĭentres The vertical measurement in an upright or sash lock between the centre of the keyhole and the centre of the follower hole.Ĭirclip A ring with open ends which can be sprung into place on a plug or other part to permit rotation but to prevent endways movement.Ĭlosed shackle padlock A padlock, the body of which is built up so that the minimum amount of shackle is visible when locked. Locks submitted for certification must satisfy the requirements of the ten stringent clauses of the specification.īurglar Bars Steel bars, usually round or square in profile, cut to length and fixed internally to window frames. Designated as the “keyhole backset” or “follower backset”.īarrel Bolt The common kind of door bolt having a round shoot running in a long continuous guide or strap attached by the backplate, the shoot being provided with a knob or the equivalent for operation by hand.īirmingham Bar A steel bar fitted to the inside face of a door frame on the hinge side.īlank (key) or key blank A partly made key, which has been shaped to enter the keyhole of a certain type of lock or latch, but of which the blade has not been finally notched to operate any individual lock.īolt The part of a lock or latch which provides the fastening or engagement by protruding from the case or forend to engage in the staple, striking plate, link, shackle or other members.īow (of a key) That part of the key which is held in the fingers when operating the lock or latch.īS – British Standard Specification Authorised and issued by the British Standards Institute, the accepted UK authority for all standards of performance, tests and manufacture.īS3621 The British Standard specification for Thief Resistant Locks for hinged doors. Backset The horizontal distance from the outside face of the outer forend to the centre of the keyhole or follower hole (or both). Bīackplate The plate, fixed on a door, to which the moving parts of a lock or latch are attached. Automatic deadlatch A deadlatch, the main bolt of which is automatically locked (or deadlocked) when the door is closed. This security device is usually achieved by a dog inside the latch case which falls behind the bolt and keeps it shot out when an auxiliary slide is pushed in.Īnti-thrust plate An overlapping metal plate fitted to outward opening doors so as to prevent access to lock bolts. A B C D E F H J K L M N O P R S T W AĪnti-thrust bolt A spring bolt, for a night latch particularly, which cannot be pushed back when it has shot out and fastened a door, although it can be withdrawn by knob or key.
Many of these terms are used on the training courses we run, so if you’re looking to change career and thinking of becoming a locksmith this guide of locksmith related terms is essential reading. To identify what type of door lock you have click here our guide covers the main types of locks used in the home. This glossary of locksmith terminology put together by the Master Locksmiths Association will help you with your security requirements. Learn different lock part names along with the components of a lock, find out what each part does.