Superior Parts SP 888-033 Aftermarket Piston Driver for Hitachi NV90AG. Aluminum is crimped into the Unilok grooves of the shaft to prevent unscrewing. Our patent-pending UNILOK piston/driver is guaranteed to never unscrew our Aftermarket Piston Driver Assemblies. This part is compatible with following Hitachi model numbers: NV90AG Coil Nailer WARNING: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
- for Hitachi NV90AG