Alloy Steel Rod, Material Alloy Steel, Material Grade 8620, Overall Length 24 in, Heat Treatable Heat Treatable, Heat Treatment No Heat Treatment, Mechanical Finish Mill, Outside Diameter 2 7/8 in, Outside Diameter Tolerance 0 in/-0.005 in, Yield Strength 55,000 psi, Fabrication Cold Rolled, Rockwell Hardness Not Rated, Brinell Hardness 85 BHN, Machinability 66 Percent, Tensile Strength 76,000 psi, Includes Material Certificate Material Certificate with Lot Number, Standards AISI 8620, ASTM A331