4140 Alloy Steel Rod, Material Alloy Steel, Material Grade 4140, Overall Length 6 ft, Heat Treatable Yes, Heat Treatment Annealed, Mechanical Finish Mill, Outside Diameter 3/4 in, Outside Diameter Tolerance +0.000 in/-0.005 in, Yield Strength Not Rated, Fabrication Cold Finished, Rockwell Hardness Not Rated, Brinell Hardness 241, Machinability Not Rated, Tensile Strength Not Rated, Includes Material Certificate No, Standards ASTM A108, ASTM A29, UNS G41400, Length Tolerance +/-6.000 in