Metal ROOFING SCREWS: (250) Screws x 3" ZINC Hex Washer Head Sheet Metal Roof Screw. Self starting/self tapping metal to wood, sheet metal roofing siding screws ~ EPDM washer. Metal Roof screw with colored head ~For corrugated roofing #10 Sheet Metal ROOFING SCREWS. Our metal roofing screws are galvanized for corrosion resistance. 250 COUNT Metal-to-wood roofing screws have a type 17 self-starting tip for easy installation Corrugated roofing and corrugated siding screws for pole barns, storage shed, shops, etc. Hex washer head roof screw with EPDM washer seal, seals roofing panel to screws to prevent leaks. The screw is Not Painted and is naturally a gray color due to the galvanizing process on the screw