screw sizes for lcn closers

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SRT "Self Reaming, & Tapping" screws are the default type screws shipped with LCN closers, when a specific screw type is not specified.   There are 3 standard lengths of SRT screws: 1-3/8" 1...
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.
No.  As of June 27th, 2018--- the cover screw is now standard in the screw packs for the 4040XP, 4040XPT, 4000T, and 4040SE so ST-3596 is no longer needed.
The maximum recommended door weight for LCN closers is 225 lbs.
The 4040XP, 1260/1261, 1460/1461, 4030/4031 closers have the tri-pack mounting option when ordered with an Rw/PA or Hw/PA designation.
The old 4030/4130 closers and arms are obsolete, there is nothing to replace them. No arm from other closers will fit  There is no closer that can replace the old 4030 series closer with the exa...
Any LCN Closer that ends in the number 1, will meet ADA 5 lbs opening forces.