Historical
ASTM A307-10
Standard Specification for Carbon Steel Bolts and Studs, 60 000 PSI Tensile Strength
1.1 This specification covers the chemical and mechanical requirements of three grades of carbon steel bolts and studs in sizes ¼ in. through 4 in. The fasteners are designated by “Grade” denoting tensile strength and intended use, as follows:
ASTM International [astm]