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n.1.(Engin.) A coupling pin. See under Coupling.
References in periodicals archive ?
In fact, the office of the museum staff is so secure with its heavy grill door that they can be trapped inside, because there is a no-nonsense barrel bolt from the outside.
Ajustlock, the world's first adjustable barrel bolt lock, is to be rolled out across the Gulf soon.
Take-down is exceedingly easy, and is accomplished by unscrewing the barrel bolt, and releasing the slide forward off the frame.
Each one has a different latch:a barrel bolt, a window sash lock, and a deadbolt from a door.