Hand Tools

HSS Unified screw thread Hand tap unc unf 1/4 5/16 7/16 3/8 1/2 9/16 5/8 3/4 7/9 LH left hand Fine HSS Unified screw thread Hand tap unc unf 1/4 5/16 7/16 3/8 1/2 9/16 5/8 3/4 7/9 LH left hand Fine HSS Unified screw thread Hand tap unc unf 1/4 5/16 7/16 3/8 1/2 9/16 5/8 3/4 7/9 LH left hand Fine