This International Standard specifies the characteristics of chamfered hexagon thin nuts (style 0), with metric fine pitch thread, with nominal thread diameters, D, from 8 mm up to and including 64 mm, with product grade A for sizes D ≤ 16 mm and product grade B for sizes D > 16 mm. 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 898-2, ISO 965-1, ISO 3506-2 and ISO 4759-1.