Description
- UN coarse UNC taps have fewer threads per inch than UN fine UNF taps
- Compared to UNF taps, UNC taps perform better in threading applications on brittle materials and are less likely to cross thread
- Coarse threads can withstand more physical abuse than fine threads
- Black-oxide finish on these taps retains lubricants to improve the taps’ wear resistance and chip flow
- Black-oxide taps should only be used on ferrous metals
