trigger bolt

trigger bolt

[′trig·ər ‚bōlt]
(design engineering)

auxiliary dead latch, auxiliary latch bolt, deadlocking latch bolt, trigger bolt

A supplementary latch in a lock which automatically deadlocks the main latch bolt when the door is closed.
References in periodicals archive ?
Bolt Lift and Trigger Bolt lift on the Zephyr II is unusually light for any bolt-action rifle, but especially for a rimfire.