Replacement Piston Driver for Hitachi NR90 NR90AD / NR90ADPR Nail Gun

Replacement Hitachi Nailer Piston Driver blade. This is a generic replacement driver with o-ring for the Hitachi NR90AD & NR90ADPR strip nail guns. 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.

Features:

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