5/16-18X3/4 Unslotted Indented Hex Head Thread Cutting Screw Type 1 Full Thread Zinc (Pack Qty 1,000) BC-31121H

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