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 upto and including 64 mm, with product grade A forsizesD<16 mm and product grade Bfor sizes D > 16 mm, 上 in special cases, Specifications other than those listed in this International Standard are redquired, they can be selected from existing International Standards, for example ISO 724, 1ISO 898-2, 1SO 965-1, 1SO 3506-2 and ISO 4759-1.