Grades for nuts
The following table lists nuts with coarse pitch thread in accordance with DIN EN 20898-2.
Nuts with a nominal height 0,8 . D (effective thread weight 0,6 . D) are identified by a number corresponding to the highest screw grade with which the nut may be matched.
Type 1: Nut weight in accordance with DIN EN 20898-2, nominal height 0,8 . D
Type 2; Nut weight in accordance with DIN EN 20898-2 (approx. 10% greater than Type 1)
A screw with a thread M 5 to M 39, matched with a nut of the corresponding grade, will give a connection that can be subjected to a load up to the test force defined for the screw without stripping of the thread.