Alloy Steel Rod, Material Alloy Steel, Material Grade 8620, Overall Length 12 in, Heat Treatable Heat Treatable, Heat Treatment No Heat Treatment, Mechanical Finish Mill, Outside Diameter 4 in, Outside Diameter Tolerance 0 in/-0.005 in, Yield Strength Not Rated, Fabrication Cold Rolled, Rockwell Hardness Not Rated, Brinell Hardness Not Rated, Machinability Not Rated, Tensile Strength Not Rated, Includes Material Certificate No Certificates Included .