Tolerances for fasteners; Part III : Washers for metric bolts, screws and nuts with thread diameters from 1 up to and including 150 mm; Product grades A and C
Описание (англ.):
Specifies the selection of tolerances for use in the preparation of ISO product standards; it is recommended that these tolerances should also be used for non-standardized washers; deviations are permitted in product standards only for valid technical reasons.