Rectangular Tubing 12 in Overall L

Aluminum Rectangular Tube 6063 Aluminum 6063 T52 Rectangle 12 in Overall Length 5 1/2 in Inside Width 3 1/2 in Inside Height 6 in Outside Width 4 in Outside Height 0.25 in Wall Thickness Wall Thickness Tolerance +/-0.025 in Fabrication Extruded Heat Treatment Tempered Heat Treatable Yes Mechanical Finish Mill Yield Strength 21 000 psi Tensile Strength 27 000 psi 60 Brinell Hardness B60 Rockwell Hardness Standards AMS QQ-A-200/9 Minimum Temperature -320 Degrees F