Together with NORSOK M-101:2011, this document defines the general requirements for structural bolting in the execution of structural steelwork as structures or as fabricated components. This amendment is valid for thread sizes M12 to M72 mm and for property classes 8.8 and 10.9. For stainless bolts this amendment is only applicable for thread sizes M12 to M39 mm and for property class A4-80. Sizes greater than M24 for property class A4-80 might not be available as bolt and nut assemblies.This amendment does not cover anchor bolts and welded bolting assemblies.