Hexagon head bolts, screws and nuts of product grades A and B: Part 5 hexagon thin nuts - Product grade B (Unchamfered) (Size Range M 1.6t0 M 10) (Fourth Revision)
Technical supply conditions for threaded steel fasteners: Part 9 surface discontinuities section 1 bolts, screws and studs for general applications (Third Revision)
Technical supply conditions for threaded steel fasteners: Part 9 surface discontinuities section 2 bolts, screws and studs for special applications (Third Revision)