This European Standard specifies the characteristics of hexagon nuts with flange, with metric fine pitch thread, with nominal thread diameters from 8 mm up to and including 20 mm, in product grade A for d = 16 mm and product grade B for d > 16 mm and with property classes 8, 10, 12 and A2-70. If, in special cases, specifications other than those listed in this European Standard are required, they should be selected from existing European and International Standards, for example ISO 261 ISO 724, EN ISO 898-6, ISO 965-2, EN ISO 3506-2.