scope:

This European Standard establishes limits for various types of surface discontinuities on nuts with - thread diameters from 5 up to and including 39 mm; - product grade A and B - all property classes according to EN 20898-2 and ISO 898-6, ISO 2320 unless otherwisespecified in product standards or by the purchaser.In case of the permissible limits for surface discontinuities indicated in clause 3, properties according to EN 20898-2, ISO 898-6 and ISO 2320 as appropriate must be satisfied. In addition, the dimensional requirements of the appropriate product standard must be satisfied.