This International Standard specifies the characterisitics of hexagon head screws with metric fine pitch thread with nominal thread diameters d from 8 mm to 64 mm of product grade A for nominal thread diameters d from 8 mm to 24 mm and nominal lengths, l, up to and including 10d or 150 mm, whichever is shorter, and of product grade B for nominal thread diameters d over 24 mm or nominal lengths, l, over 10d or 150 mm, whichever is shorter.

If, in special cases, specifications other than those listed in this International Standard are required, they should be selected from existing International Standards, for example ISO 724, ISO 888, ISO 898-1, ISO 965-1, ISO 3506-1, ISO 4753 and ISO 4759-1.

Coarse thread screws according to ISO 4017 should be first choice.