base material for lcn thru bolts

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The LCN Thru bolts accept 1/4-20 thread. LCN thru bolts are made of steel with zinc plating.
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.
The standard screw pack for an 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 do need to...
All LCN metal covers are steel which is a Ferrous material. FerrousThese are metals which contain iron. They may have small amounts of other metals or other elements added, to give the require...
299 strike = Zinc 299F strike= Stainless steel