Applies only to fastener components after completion of manufacture: with nominal thread diameters from 1,6 mm up to and including 39 mm according to ISO 68 and ISO 262 of any shape, and additionally for nuts of any shape provided that width across flats or outside diameters is not less than 1,45 times nominal diameter and effective thread engangement is at least 0,6 times nominal diameter.
Заменён стандартами:
ISO 3506-1(1997.12)*ISO 3506-2(1997.12)*ISO 3506-3(1997.12)