Replacement Bostitch Nailer Driver Blade Piston Driver. This is a generic replacement driver with o-ring for the Bostitch MCN250 & MCN250S Nailer. This comes with a patent pending locking mechanism which will not allow the driver to unscrew from the piston. Aluminum is crimped into the unilok grooves of the shaft to prevent unscrewing. Guaranteed never to unscrew.
- Japanese Carbide Blade SKH-9
- Heat Treated to Rockwell C Hardness 64-66
- Typically used in making professional grade dies, taps, punches and tooling
- In field tests it lasts significantly longer than the US S7 Steel
- Aerospace grade #2024 Aluminum piston
- Mechanically locked piston driver interface