Superior Parts SP 877-307K Aftermarket Head Cap / Gasket / Exhaust Valve (with Hole) Kit for Hitachi NR83A2, NR83A3 Framing Nailers. Heat treated head cap for maximum strength. Includes Head Cap & Gasket with Exhaust Valve. Orange Color PVC Material. Details Compatible with: Hitachi NR83AA3 Clipped Head Framing Nailer NR83A2(S) Framing Nailer, Full Head, Plastic Strip Collation (without Depth Adjustment) NR83A2 Strip Nailer NR83A Full Head Nailer Kit Includes: SP 877-307 SP 884-110 More Information Model# SP 877-307K UPC 099461763319 WARNING California Proposition 65 Brand Superior Parts