This standard specifies hexagon head bolts with thread specifications of M1.6~M64, full thread, performance rate of 5.6, 8.8, 9.8, 10.9, A2-70, A4-70, A2-50, A4-50, CU2, CU3 and AL4 and production Grades of A and B. Grade A is used for bolts with d= 1.6~24 mm and l≤10d or l≤150mm (on the basis of the smaller value); Grade B is used for bolts with d>24 mm or 1>10d or l>150 mm (on the basis of the smaller value).
Note: This kind of products can only be made into full thread and may be as long as 200mm when using as nominal length for the merchandise length specification, other features are same as those specified in GB/T 5782.
If any other technical requirements are required, it shall be selected from the current standards (such as GB/T 196, GB/T 3106, GB/T 3098.1, GB/T 3098.6 and GB/T 3103.1).
