Stainless Steel Hex Bar, Stainless Steel, 303, Hexagon, 36 in Overall Length, Length Tolerance +/-3 in, 7/16 in Hex Width, Width Tolerance 0 in/-0.003 in, Fabrication Cold Rolled, Heat Treatment Annealed, Heat Treatable Heat Treatable, Mechanical Finish Mill, Yield Strength 30,000 psi, Tensile Strength Not Rated, 255 BHN Brinell Hardness, 25 HRC Rockwell Hardness, Includes Material Certificate Material Certificate with Lot Number, Standards ASTM A582, QQ-S-764, SAE AMS5640