5/16-18X5/8 Unslotted Indented Hex Washer Thread Cutting Screw Type 1 Fully Threaded Zinc An (Pack Qty 1,750) BC-31101W

May be used in steel sheets, structural shapes, special alloy steels, cast iron, brass or plastics AISI 1016 - 1024 or equivalent steel Screws shall be quenched in liquid and then tempered by