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bottom bolt

a bolt at the bottom of a door or the like, sliding into a socket in the floor or sill and equipped with a device for keeping it raised when the door is not fastened. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for bottom bolt
  • The top bolt was hand tight and the bottom bolt was wrench tight.
  • The top bolt will go into old pipe the bottom bolt will go into the new pipe.

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