4ZDU3-A Stainless Steel Flat Bar, Stainless Steel, 304, Square, 6 in Overall Length, Length Tolerance +0.125/-0.000 in, 6 in Overall Width, Width Tolerance +0.125/-0.000 in, 0.375 in Thickness, Thickness Tolerance +0.055/-0.01 in, Fabrication Hot Rolled, Heat Treatment Annealed, Heat Treatable No, Mechanical Finish Mill, Yield Strength 25,000 psi, Tensile Strength 70,000 psi, 160 Brinell Hardness, 80 Rockwell Hardness, Includes Material Certificate Yes