Aftermarket Hitachi Coil Nailer Piston Driver. This is a generic replacement driver with o-ring for the Hitachi NV65AH / NV65AH2 coil nail guns. This driver comes with O-Ring (880-311) but does not include the plastic piston ring (878-691). This piston ring goes on top of the under sized O-Ring. The UNI-LOK piston driver is designed to ensure that our Piston Driver Assembly remains securely fastened and guaranteed to never unscrew.

Features:

• Heat treated tool steel 6150 - Rockwell hardness 50-52
• Aerospace grade #2024 Aluminum piston
• Mechanically locked piston driver interface

Compatible with:

Hitachi

• NV65AH Coil Siding Nailer
• NV65AH2 2-1/2" Coil Siding Nailer