Senco BB0177 Piston Stop Replacement Part for Nailers LS1XP, SLP20, SLP20XP

The Senco BB0177 Piston Stop is a replacement internal component designed for compatible pneumatic nailers, where it cushions the piston and driver as they retract into the cylinder after firing. Senco service documentation notes that BB0177 replaced the earlier BB0109 piston stop and features an improved rubber material and geometric design intended to increase part life. The piston stop helps absorb impact at the end of the piston stroke, reducing stress on surrounding internal components and supporting consistent tool operation. Constructed from rubber and listed in black, it is suited for routine pneumatic tool maintenance and replacement when the existing stop becomes swollen, damaged, cracked, or deteriorated. The BB0177 is compatible with Senco LS1XP, SLP20, SLP20XP, and SLP20XP18Ga nailer models, making it a suitable replacement for servicing these specific tools. Always disconnect the air supply and release stored air pressure before servicing the nailer, and verify the model and parts diagram before installation.