scope:

This standard defines, illustrates, and specifies allowable limits for various types of surface discontinuities that may occur during the manufacture and processing of metric-series nuts, in sizes 6 through 25 mm and inch-series nuts, in sizes 1/4 through 1 inch which are primarily intended for use in automotive assemblies.

This standard does not include inspection sampling requirements. It is intended that the purchaser shall specify in the original inquiry and purchase order the inspection sampling requirements which the producer must satisfy to demonstrate the acceptability of nuts with respect to surface discontinuities.