Superior Parts SP 877-316 Aftermarket O-Ring for Hitachi NR83A, NR83A2, NR83A2(S) - 3 pcs/pack Compatible With Hitachi: 83AA2 Strip Nailer | H90SB 1-1/8" Hex Demolition Hammer H90SBKIT 1-1/8" Hex Demolition Hammer | H90SBKIT2 1-1/8" Hex Demolition Hammer | H90SBKIT4 1-1/8" Hex Demolition Hammer | H90SE 1-1/8" Hex 70lb Breaker NR83A 3-1/4" Full Head Nailer | NR83A2 Strip Nailer | NR83A2(S) Framing Nailer, Full Head, Plastic Strip Collation (without Depth Adjustment) | NR83A3 Strip Nailer NR83A3S Strip Nailer | NR83AA 3-1/4" Clipped head Framing Nailer | NR83AA2 3-1/4" Clipped head Framing Nailer | NR83AA3 Clipped Head Framing Nailer | NR83AA4 3-1/4" Paper Collated Framing Nailer NV65AA Nailer | NV65AC Coil Pallet Nailer | NV75A Nailer | NV83A 3-1/4" Full Head, Framing Coil Nailer | NV83A15 Nailer | NV83A2 Full Round Head Coil Nailer | NV83A3 Nailer.