from The Century Dictionary and Cyclopedia
- n. A bolt having one end in the form of a hook.
Sorry, no etymologies found.
The muck was carried out by two cableways, one on each side of the completed middle wall, each of which was supported by a tower outside of the tunnel and a large hook-bolt grouted into the rock at the inner end of the tunnel.
The Loader and Sponger pass the frapping lashing round both parts of the breeching, in front of the brackets, and with the assistance of the men nearest them bowse it well taut; and secure the muzzle by placing the grommet over it and the housing hook-bolt, and by frapping the two parts together with the lashing.
The grommet will be made large enough just to slip over the swell of the muzzle when the bight is over the housing hook-bolt, and the gun is in position for housing.
(often left out as in drawer-locks, but essential in hook-bolt locks, and self-locking locks,) and the _escutcheon_, the plate around the keyhole.