Alloy Steel Rod, Material Alloy Steel, Material Grade 4140, Overall Length 12 in, Heat Treatable Heat Treatable, Heat Treatment Annealed, Mechanical Finish Mill, Outside Diameter 3 3/4 in, Outside Diameter Tolerance -0.005 in, Yield Strength 60,000 psi, Fabrication Cold Rolled, Rockwell Hardness 10 HRC, Brinell Hardness 241 BHN, Machinability 66 Percent, Tensile Strength 114,000 psi, Includes Material Certificate Material Certificate with Lot Number, Standards ASTM A304, ASTM A322, ASTM A331