M3870 Aluminum Square Tube 12 in Overall L 1200_12_0

M3870 Aluminum Square Tube 6063 Aluminum 6063 T52 Square 12 in Overall Length 2 1/2 in Inside Width 2 1/2 in Inside Height 3 in Outside Width 3 in Outside Height 0.25 in Wall Thickness Wall Thickness Tolerance +/-0.011 in Fabrication Extruded Heat Treatment Tempered Heat Treatable Yes Mechanical Finish Mill Yield Strength 31 000 psi Tensile Strength 35 000 psi 73 Brinell Hardness B17 Rockwell Hardness Includes Material Certificate Yes Standards ASTM B221