Door Lock Components Diagram -

+-------+ +-------+ | Keyway| | Thumb | | (1) | | Turn | +---v---+ | (10) | | +---v---+ v | +-----------+ | | Plug (2) | | +-----+-----+ | | | +---------+---------+ +------+------+ | Housing | | Rose/Escutcheon (9)| | (3) | +------+------+ +---------+---------+ | | | +---------+---------+ +------+------+ | Driver Pins (4) |<---Spring (5) | Latch Bolt | | & Key Pins (6) | (above) | (11) | +---------+---------+ +------+------+ | | | +-------------------+ | +-------->| Cam (7) |<------+ +--------+----------+ | v +-------------------+ | Tailpiece (8) | +-------------------+ | v +-------------------+ | Deadbolt/ Latch | | Mechanism (12) | +-------------------+

Understanding the various components of a door lock is essential for both home security and basic maintenance. Most standard residential locks, such as pin-tumbler locks found in knobs and deadbolts, share a common set of parts that work in harmony to secure your entryways. Core Internal Components door lock components diagram

The central body where the key is inserted. It houses the pins and tumblers that must align to release the lock. +-------+ +-------+ | Keyway| | Thumb | |