what cylinder cam for sargent mullion

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Von Duprin KR (key removable) mullions requires a 1-1/8" or 1-1/4" mortise cylinder with the standard straight cam, the cam is not inverted. Please see chart below for part numbers. 
instructions
Click here for a list of available Schlage cams comparable to the Sargent 13-0660.
The Sargent cams listed below work for all applications except 16 inside and 50 outside.  The equivalent Sargent cam is the 13-0660. Use the B520-736 for modular cylinder lengths of 1 1/8",...
The KR4023 mullion requires a 1-1/4" mortise cylinder with straight cam. This is stated in box 7 on the first page of the KR4023 mullion instructions.
 A 1 1/4" cylinder with straight cam is required for the Von Duprin SD (Special Dogging) exit device option.
The cylinder cam must be inverted with the SD option to work properly.
A modular cylinder's length is determined by 4 basic parts; a cam screw, cam, plug extension, and a back housing.  Most of these parts are used in more than one cylinder length and...