Aluminum Round Tube, Aluminum, 6061, T6, Round, 12 in Overall Length, Length Tolerance +/-1 in, Outside Diameter 5/8 in, Outside Diameter Tolerance +/-0.004 in, Inside Diameter 0.555 in, 0.035 in Wall Thickness, Wall Thickness Tolerance +/-0.002 in, Fabrication Cold Drawn, Heat Treatable Heat Treatable, Mechanical Finish Mill, Yield Strength 40,000 psi, Tensile Strength 45,000 psi, 95 BHN Brinell Hardness, 60 HRB Rockwell Hardness