Flat Bar Stock Aluminum 6061 T6511 Sheet 6 ft Overall Length Length Tolerance +0.125/-0.000 in 1/4 in Overall Width Width Tolerance +/-0.008 in 0.25 in Thickness Thickness Tolerance +/-0.008 in Fabrication Extruded Heat Treatment Tempered Heat Treatable Yes Mechanical Finish Mill Yield Strength 40 000 psi Tensile Strength 45 000 psi 95 Brinell Hardness 60 Rockwell Hardness Includes Material Certificate Yes Standards AMS QQ-A-200/8 ASTM B221