This part of ISO 6157 establishes limits for various types of surface discontinuities on bolts, screws and studs for general requirements. It applies to bolts, screws and studs with: nominal thread diameters 5 mm and larger; product grades A and B; property classes up to and including 10.9, unless otherwise specified in product standards or agreeed between supplier and purchaser.
DS/ISO 6157-1:1992 history
1992DS/ISO 6157-1:1992 Fasteners - Surface discontinuities - Part 1: Bolts, screws and studs for general requirements