screw options for LCN closers?

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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...
The SRT screw that is used for mounting the 1461 closer body is 1 3/8" long.Four screws are used to mount the closer body.
Any LCN Closer that ends in the number 1, will meet ADA 5 lbs opening forces.
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...
It would be unnecessary to use the CNS/Cush arm and the Glynn Johnson overhead devices in the same application, both mechanisms stop the door.
LCN does not recommend this type of installation, and has never sold a coupler to do this.
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.
Torx head screws are only available as machine screws.