Stainless Steel Hex Bar Stainless Steel 304 Hex Bar 36 in Overall Length Length Tolerance +0.125/-0 in 3/8 in Hex Width Width Tolerance +0.000 in/-0.003 in Heat Treatment Annealed Heat Treatable No Mechanical Finish Unpolished Yield Strength 31 200 psi Tensile Strength 73 200 psi 123 Brinell Hardness 70 Rockwell Hardness Includes Material Certificate Yes Standards AMS 5639 AMS 5647 AMS QQ-S-763 ASTM A182 ASTM A193 ASTM A262 ASTM A276 ASTM A479 ASTM A484