when are thru bolts required on closers

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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 LCN 4041/4040XP and the Glynn Johnson 90 series can be mounted in conjunction with each other without a special template.  The 4040 door closer is on the pull side of the door and the GJ 90 is ...
 Mounting Posts   Part Number  Door Thickness  L583-211  1 3/8"  L583-212  1 3/4" - See note section on SL1 trim  L583-213  2...
Order the M204-198 thru-bolt jig, see Figure 1. Figure 1: M204-198 thru bolt jig The 40-080 was the old Schlage jig. The 030736-000-70 was the old Falcon jig.  When the jig changed to...
The LCN Thru bolts accept 1/4-20 thread. LCN thru bolts are made of steel with zinc plating.
The minimum top rail required to mount a 4110 closer is 5-1/8" measured from the stop of the frame. If the top rail is less than 5-1/8" the 4110-18 drop plate is required.
Closers mounted according to LCN installation instructions require no periodic maintenance or seasonal adjustments.  Monthly, quarterly, and annual visual inspections are recommended for Fire/...
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.