Perforated Sheet Aluminum 3003 H14 Rectangle Appearance Pattern 40 in Overall Length Length Tolerance +/-0.125 in 36 in Overall Width Width Tolerance +/-0.125 in 0.032 in Thickness Thickness Tolerance +/-0.0025 in Gauge 20 ga Center Spacing 0.281 in Hole Diameter 0.25 in Hole Pattern Staggered Hole Shape Hex Fabrication Cold Finished Heat Treatment No Heat Treatment Heat Treatable No Mechanical Finish Mill Yield Strength 22 000 psi Tensile Strength 22 000 psi