The difference between coarse and fine threads in
2020-5-25 · The difference between coarse and fine threads in machining. 1. Coarse threads do not need to be marked with pitch, such as M8, M12-6H, M16-7h, etc., mainly used for connecting threads. Compared with fine threads, due to the large pitch, the angle of thread rise is also large, and the self-locking property is poor.