ASTM A 490 - 06 Standard Specification for Structural Bolts, Alloy Steel, Heat Treated, 150 ksi Minimum Tensile Strength

American Society for Testing and Materials (ASTM). Current edition approved Aug. 1, 2006. Published August 2006. Originally approved in 1964. Last previous edition approved in 2004 as A 490 – 04a. 6 p. This specification covers two types of quenched and tempered, alloy steel, heavy hex structural bolts having a tensile strength of 150 to 173 ksi.