HSS Right hand Unified screw thread tap unc un 13/16 13/16-12 13/16-14 Fine Thread taps unef uns 13/16-16 13/16-18 13/16-20

HSS Right hand Unified screw thread tap unc un 13/16 13/16-12 13/16-14 Fine Thread taps unef uns 13/16-16 13/16-18 13/16-20

Aliexpress UK