Why Choose This Repair Kit?
When your nailer suffers from air leaks, weak drives, or delayed triggers, replacing seals and valves is the ultimate fix. This kit is engineered for high-demand scenarios:
Real-World Value:
Construction Sites: Daily nail driving wears out O-rings? Our oil-resistant rubber handles hundreds of impacts daily, minimizing downtime.
Woodworking Shops: Valve lag ruins precision? The 647956-00 assembly ensures consistent airflow for perfect nail placement in furniture and framing.
Home DIY: Old nailer losing power? Revive it at a fraction of the cost of a new tool.
Compatible Models (Partial List)

D51256 Type 1 Finish Nailer Kit
D51256 Type 2 Finish Nailer Kit
D51238 Type 1 Brad Nailer Kit
D51430 Type 1 Stapler
D51431 Type 1Stapler
D51321 Type 1 Coil Roofing Nailer
D51236 Type 1 Nailer
D51238 Type 2 Nailer
D51256 Type 3 Nailer
D51275 Type 2 Nailer
D51275 Type 3 Nailer
D51420 Type 1 Stapler
D51422 Type 1 Stapler
D51430 Type 2 Stapler
D51431 Type 2 Stapler
D51825 3 1/2 Framing Nailer
D518503 1/2 Framing Nailer
D51276 15 Gauge Finish Nailer
D51257 16 Gauge Finish Nailer
D51275 Type 1 Finish 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 Finish Nailer
D51257K Type 2 16 GA Finish Nailer
D51420K (Type 1) 18 Gauge 1" X 1/4" Narrow Crown Stapler
D51422K (Type 1) 18 Gauge 1-1/2" x 1/4" Narrow Crown Stapler
D51276K (Type 1) 15 Gauge 1" to 2-1/2" Finish Nailer
D51236K (Type 1) 18 Ga 1 1/4" Brad Nailer
D51238K (Type 1) 2" 18 Ga Brad Nailer
Package Includes

1× D51844 O-Ring Rebuild Kit (Type 1-5 seals included)
1× 647956-00 Trigger Valve Assembly