rim modular part number

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The 050672 is the part number for rim or vertical rod device and 050673 for the mortise device.
The rim cylinder with thumbturn, XB11-979 (Figure 1) was designed to be installed on the inside head of the Von Duprin 98/99–2 double cylinder exit devices, see Figure 1. The rim cylinder with...
L583-446; Schlage Adams Rite MS modular cam used on 1 1/8", 1 3/8" and 1 5/8" cylinders    L583-447; Schlage Adams Rite MS modular cam used on 1 1/4", 1 1/2" and 1 3/4" cylinders  B502-944; Sch...
Schlage has released a modular cylinder sales kit, part number 40-224.  It's contents and information can be found here.
See descriptions for the 09-992 thru 09-997 parts kits for modular mortise cylinders.  The 09-998 is a kit for a rim cylinder.      
The B220-001 is an FSIC rim tailpiece and driver.
Attached tables provide the back plate conversion kit for all 88 series Exit devices. 88 Back plate conversion Chart
B502-899 is the tailpiece for both the SFIC and standard rim cylinders.
The part number for 88 rim end case spring is 090003-00 (PKG of 2) or 090080-00 (PKG of 10) and latch tail spring is 050393-00 (PKG of 10).
The Schlage SFIC rim cylinder driver is part number B520-365, shown below.     Figure 1: SFIC Rim Cylinder Housing