This standard specifies the types, dimensions, specifications and designation of hexagon nuts, style 1 with fine pitch thread.
This standard is applicable to Grades A and B hexagon nuts, style 1 with fine pitch thread, with nominal diameter of thread, D, equal to 8 mm~64 mm, and performance grades of 6, 8 and 10, A2-50, A2-70, A4-50, A4-70, CU2, CU3 and AL4. Grade A products are used for nuts with D less than or equal to 16mm; Grade B products are used for nuts with D greater than 16mm.
