1/4-14X1/2 Unslotted Indent Hex Washer Self Tapping Screw Type B Full Thread Black Oxide (Pack Qty 3,000) BC-1408BWB

For molded or through holes in thin metal, non-ferrous castings, plastics or resin-filled plywood Screws shall be quenched in liquid and then tempered by reheating to 650°F minimum Steel: AISI 1016 - 1024 or equivalent steel.