Piston Driver Aluminum is crimped into the unilok grooves of the shaft to prevent unscrewing. Hardened steel lock tite and micro-mechanically locked piston driver interface. Guaranteed never to unscrew.
Piston bumper is Precision machined, virgin high density yellow color plastic framer bumper.
Fits Hitachi NR83A Nail Gun.
A2 877-323 878-303 - DB83-01