Bostitch 180563 Contact Force Spring (Replaces PB4141S1)

Bostitch
FN1664 Oil Free Finish Nailer
SB-1664FN Finish Nailer
FN1664K (Type 0) 16 G Finish Nailer
BTFP1664K (Type 0) 16ga Straig Fin Nail
Porter Cable
FN250SB (Type 0) Finish Nailer
FN250SB (Type 16155000 and Higher) Finish Nailer
FN250SB (Type 16240001 and Higher) Finish Nailer
FN250SB (Type 17019001 and higher) Finish Tool
Stanley
FMFP71927 (Type 0) 16g Fin Nailer