guard bolt

  n.
   a spring loaded bolt which, when activated, will deadlock a latch bolt

Locksmith dictionary . 2014.

Look at other dictionaries:

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  • bolt — I UK [bəʊlt] / US [boʊlt] noun [countable] Word forms bolt : singular bolt plural bolts * 1) a metal bar that you slide across a door or window in order to lock it 2) a type of screw without a point that is used for fastening things together and… …   English dictionary

  • guard lock — noun 1. : a tide lock at the mouth of a dock or basin or a lock for preventing flooding of a canal 2. : a lock guarding the keyhole or bolt of another lock and having to be unlocked before the key of the main lock can be operated …   Useful english dictionary

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