This national standard specifies the characteristics of hexagon socket countersunk head screws with threads from M3 up to and including M20, with product grade A and property classes 8.8, 10.9 and 12.9.
Note: Particular attention is drawn to the note in Table 2 and Table 3, concerning the limitation on ultimate tensile load.
If, in special cases, specifications other than those listed in this national standard are required, they should be selected from existing national standards, e.g, GB/T 196,GB/T 3106,GB/T 3098.1 and GB/T 3103.1.
This national standard specifies the characteristics of hexagon socket countersunk head screws with threads from M3 up to and including M20, with product grade A and property classes 8.8, 10.9 and 12.9.
Note: Particular attention is drawn to the note in Table 2 and Table 3, concerning the limitation on ultimate tensile load.
If, in special cases, specifications other than those listed in this national standard are required, they should be selected from existing national standards, e.g, GB/T 196,GB/T 3106,GB/T 3098.1 and GB/T 3103.1.
