D51844 O-Ring Rebuild Kit and 647956-00 Tirgger Valve Assembly for Framing Nailer Universal. D51844 O-Ring For D51822 D51844 D51845 | D51823 Universal O-Ring Kit Type 1, 2, 3, 4 and 5 647956-00 Replaces Model Numbers: 64762000 647956 00 64795600 641011 00 N566148 D51256 D51321 D51430 D51431 D51276 D51276 55182222. Fits D51275 Type 1 Nailer, D51855 Type 1 Coil Framing Nailer, D51321 Type 2 Coil Roofing Nailer, D51822 Type 4 Framing Nailer, D51844 Type 4 Framing Nailer, D51257k Type 1 16 Ga Nailer, D51257k Type 2 16 Ga Nailer, D51276k (Type 1) 15 Gauge 1 inch to 2-1/2 inch Nailer, D51238k (Type 1) 2 inch 18 Ga Nailer. Colour:Random Color, don't accept specified color Material:Metal Package Contents: 1 * set D15844 O-Ring Rebuild Kit Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.