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“ THRU BOLT SIZE ”

Resolution: The LCN Thru bolts accept 1/4-20 thread. LCN thru bolts are made of steel with zinc plating.:

What size machine screws are used with thru bolts and a 2-3/4" thick door and a 4040 closer?

Resolution: 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.:

Resolution: The standard screw pack for most LCN closer is the SRT (Self Reaming and Tapping) screw. Thru bolts are an option but must be specified on the order. There is no charge for them, but they...:

FASTENERS

Resolution: Screws, Thru Bolts, SNB, Sex Nuts & Bolts:

TBTRX

Resolution: Thru-Bolt, ‘Torx’ Machine Screws:

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“ THRU BOLT SIZE ”

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