This International 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 to Table 3, concerning the limitation on ultimate tensile load.
If, in special cases, specifications other than those listed in this International Standard are required, they should be selected from existing International Standards,e.g. ISO 261, ISO 888, ISO 898-1, ISO 965-2 and ISO 4759-1.