1 1/4-7X5 1/2 Coarse Thread Hex Cap Screw Grade 5 Zinc (Pack Qty 15) BC-12588CH5O

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