The piece of metal that extends from the door into the frame. Latches are spring-loaded (for clicking shut), while deadbolts are moved manually by the key or thumbturn.
To visualize a door lock mechanism diagram, you need to know the names of the "players" involved: Door Lock Mechanism Diagram
Whether you are reverse-engineering a sticky lock, upgrading to a smart deadbolt, or simply satisfying your curiosity, the is your map. From the humble shear line of a pin tumbler lock to the complex gearing of a mortise case, every part plays a role in keeping your threshold secure. The piece of metal that extends from the door into the frame
The most common residential lock (described above). From the humble shear line of a pin
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This is the heart of the locking mechanism. Inside the cylinder, you will see small holes drilled perpendicular to the keyway. These hold the pins: