Flat Bar Stock Aluminum 6061 T6511 Sheet 24 in Overall Length Length Tolerance +/-2.000 in 4 in Overall Width Width Tolerance +/-0.034 in 0.375 in Thickness Thickness Tolerance +/-0.008 in Fabrication Extruded Heat Treatment Pre-Hardened Heat Treatable Yes Mechanical Finish Mill Yield Strength 37 000 psi Tensile Strength 42 000 psi 95 Brinell Hardness B95 Rockwell Hardness Includes Material Certificate Yes Standards ASTM B221 AMS QQ-A-200/3