Normas ISO

Fasteners — Hexagon head screws — Product grades A and B

Fasteners — Hexagon head bolts with reduced shank (shank diameter ˜ pitch diameter) — Product grade B

Fasteners — Hexagon head bolts — Product grade C

Fasteners — Hexagon head bolts, with fine pitch thread — Product grades A and B

Fasteners — Hexagon head screws — Product grade C

Reference materials for particle size measurement — Specification of requirements