srt screw size

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Question
Answer
The LCN Thru bolts accept 1/4-20 thread. LCN thru bolts are made of steel with zinc plating.
The cam screw uses a T-10 and the housing screws use a T-15 driver.
A 4040 closer mounted with thru bolts on a 2-3/4" thick door would require 1/4-20 X 3-1/2" machine screws.
Steelcraft follows the industry standards for hinge reinforcement and preparation for both door and frame. Unless otherwise specified all products prepared for butt hinges will have mounting holes ...