9/16-18X3 1/2 Fine Thread Hex Cap Screw Grade 8 Zinc Yellow (Pack Qty 125) BC-5756CH8O

Has greater tensile strength than a Grade-2. Yield-to-tensile ratio is the lowest of all heat treated steels Grade-5 cap screws shall be heat treated, oil or water quenched, at the option of the manufacturer, and tempered at a minimum tempering temperature of 800°F