Stainless Steel Flat Bar Stainless Steel 304 Rectangular Bar 12 in Overall Length Length Tolerance +/-1.000 in 2 1/2 in Overall Width Width Tolerance +/-0.004 in 0.375 in Thickness Thickness Tolerance +/-0.003 in Fabrication Hot Rolled Heat Treatment Annealed Heat Treatable Yes Mechanical Finish Mill Yield Strength 30 000 psi Tensile Strength Not Rated 131 Brinell Hardness 74 Rockwell Hardness Includes Material Certificate Yes Standards AMS 5639 ASTM A276 ASTM A479