Sandvik Coromant Threading - Manual (Page 6)

6
1. Basic in threads
Tolerance positions
The tolerance position identifi es the fundamental deviation and is
indicated with an upper-case letter for internal threads and a lower
case letter for external threads. A combination of tolerance grade and
position give the tolerance class. The values of the tolerance classes
are given in the standards for the different threading systems.
Tolerance positions
Internal threads H and G
External threads h, g, f and e