The Corbin Russwin 188F03 Quik-Install Mounting Bracket is the standard bracket shipped by them for the past 40 years. This replacement bracket will work on the older Corbin 100, 110, and 120's, and the Russwin 2800, 2810 and 2820's. Along with the DC3210 and DC6210 Door Closers. This bracket is what you mount on the door or door frame and the door closer cylinder mounts to. Corbin Russwin part # 188F03.
Bracket size: 1-3/4" (44mm) (vertical) x 6" (152mm) (horizontal)
Hole spacing: 1" (25mm) (vertical) x 4-5/16" (110mm) (horizontal)