This International Standard specifies the characteristics of hexagon head screws with threads from M5 up to and including M64, of product grade C. NOTE This type of product is the same as that covered by ISO 4016 with the exception of threading up to head. If, in special cases, specifications other than those listed in this International Standard are required, they can be selected from existing International Standards, for example ISO 724, ISO 888, ISO 898-1, ISO 965-1 and ISO 4759-1.