scope:

This International Standard specifies the characteristics of hexagon nuts, style 1, 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. Coarse thread hexagon nuts, style 1, according to ISO 4032 are intended to be the first choice. NOTE 1 For hexagon nuts, style 2, with fine pitch thread, see ISO 8674. NOTE 2 In practical use, style 2 nuts according to ISO 8674 are intended to be given preference in comparison to style 1 nuts according to this International Standard as their increased nut height minimizes the risk of thread stripping.