12-R NPSM-1/2 (37570) 1/2 in. Exposed Manual Ratchet Threader Die Head, Alloy RH, NPSM is designed for use with the Model 700 hand-held power drive. It is also suitable for use with the 12-R (30118) ratchet and handle assembly. The NPSM die head has a nominal pipe size of 1/2 inch.








