Mortise Bolt


Old 11-24-04, 08:51 AM
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Mortise Bolt

Can someone explain to me exactly what a mortise bolt is? I'm thinking of a particular solution for an interior door, but I'm not sure if what I'm thinking of is a mortise bolt. Thanks in advance for any input.
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Old 11-24-04, 08:50 PM
WGW is offline
Join Date: Nov 2003
Location: Ontario
Posts: 313
Hi polardada
A mortise bolt is a rectangular bolt housed in a metal box measuring some where around 1" X 3" X 4". The bolt is operated by a mortise cylinder that is screwed through a hole in the outside of the door and into the box. On the inside, it is usually operated by a mortise thumbturn.
The box is fully "mortised" into the door using a spade bit or hole saw, making perhaps three or four holes, one slightly overlapping the other. Those holes are then squared out with a wood chisel just enough to accept the box. Then the installation is finished by making the cutout for the rectangular faceplate attached to the box.
The bolt is much heavier than a standard deadbolt but is also much more difficult to install.


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