Complete Guide to Thread Standards: A Practical Resource
UNC: Unified Coarse Thread 5/16: Nominal size of the thread, in inches 18: Pitch of 1/18, meaning 18 threads per inch 3A: Tolerance grade, level 3, external thread (B is for internal thread) R.H: Right-hand What Are the Differences Between Metric Threads and Imperial Threads? Metric threads are represented by pitch, while American and British … Read more