BS A 274:1981

Действует

Specification for procurement of alloy steel bolts, metric, with a minimum tensile strength of 1100 MPa — 20 стр.

ICS

49.030.20 Bolts, screws, studs / Болты, винты, шпильки

77.140.20 Stainless. Including alloyed steels, corrosion-resistant steels, heat-resisting steels, etc. / Высококачественные стали