Acorn International No. 9 Sizes X 2-1/5 in. L Self-Tapping Hex Head Sheet Metal Screws 250 pk

#9-15 metal to wood screws are sealing self-piercing tapping screws made from heat treated C1022 steel, case hardened for roofing and siding applications. A 1/4" across flats high hat hex washer head with assembled EPDM washer offers easy driving and conforms to the metal surface for a secure and long-lasting seal.