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Fits: Hitachi NR65A Nailer. Heat treated tool steel 6150 Rockwell hardness 50-52. Aerospace grade number 2024 Aluminum piston. Mechanically locked piston driver interface. Includes (5) 883-471 Piston Drivers. Fits: Aftermarket Hitachi Nailer Piston Driver. This is a generic replacement driver with o-ring for the Hitachi NR65AK, NR65AK2, NR65AK(S) guns. This comes with locking mechanism which will not allow the driver to unscrew from the piston. Aluminum is crimped into the unlock grooves of the shaft to prevent unscrewing. never to unscrew.






