Are machine screws better than SRT screws?

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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 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.
LCN "does not" recommend the use of SRT screws is wood doors. LCN "only" recommends the use of Wood Screws in wood doors and frames, as noted on the installation instructions.
The part number for 88 series dogging screw is 090004 (package of two) and 090083(package of ten).
The old wedgetite screw had a fine threads and was redesigned in late 1970's.  The part number is 091082-00 (package of 10).
Von Duprin 98/99 NL drive screw is located in back of the 98/99 center case assembly. NL drive screw should be left in with trim lock slide plate in up position in the 98/99 exit device with E99...
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 LCN Thru bolts accept 1/4-20 thread. LCN thru bolts are made of steel with zinc plating.