Screws for Fastening Pipe Fittings and Clamps-5/16 x 1-1/2in Slotted Hex Washer Tapping Screw
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Also called sheet metal screws, tapping screws are fasteners that are used for screwing materials such as wood and metal together. A pilot hole needs to be drilled beforehand. These feature a hex washer head. (HWTS516112S)