Bostitch part number
850006 is an O-ring that fits a wide variety of Bostitch pneumatic tools, including several nailers and staplers
This O-ring is used in the following Bostitch models and their various revisions/types:
Nailers :
N57C Coil Nailer
N58C-1-E Nailer
IC60-1-E Nailer
RN45B Coil Nailer (part of an O-ring kit)
Staplers :
750S4-1 Pneumatic Stapler
750S5-1 Pneumatic Stapler
765Q-1E Pneumatic Stapler
765S4-1E Stapler
765S5-1E Pneumatic Stapler
850S4-1 Pneumatic Stapler
863S4-1-E Pneumatic Stapler
T55S4 Stapler
T55S5 Stapler