Superior Parts SP 174075 Aftermarket Bumper / Piston Stop for Bostitch. Replaces: Bostitch 174075 & P2320001200. Details Compatible with Bostitch MCN150 Metal Connector Nailer N66C Coil-Fed Pneumatic Nailer N66BC Cap Nailer N66BC-1 (Type 0) Cap Nailer N66C-1 (72400000) 15 Degrees Coil Siding Nailer More Information Model# SP 174075 UPC 099461765429 WARNING California Proposition 65 Brand Superior Parts