ASTM A 307 - 07a Standard Specification for Carbon Steel Bolts and Studs, 60 000 PSI Tensile Strength

American Society for Testing and Materials (ASTM). Current edition approved Aug. 1, 2007. Published August 2007. Originally approved in 1947. Last previous edition approved in 2007 as A 307 – 07. 5 p. This specification2 covers the chemical and mechanical requirements of three grades of carbon steel bolts and studs in sizes 1⁄4 in. through 4 in.