Flat Stock Material Brass Material Grade 260 Mechanical Finish Mill Overall Length 12 in Overall Width 1/4 in Yield Strength 57 000 psi Thickness 0.032 in Thickness Tolerance +/-0.003 in Standards ASTM B36 Temper H02 Rockwell Hardness B79 / T72 Shape Rectangular Bar System of Measurement Inch Width Tolerance +/-0.005 in Tensile Strength 9 000 psi