Used to attach Suntuf, Suntop, or Palruf panels to metal framing, these 2 in. carbon steel screws are galvanized with a zinc plating to resist rust and corrosion. They come with a sealing EPDM washer to prevent leaks through the panels at the point of attachment. EPDM washers are chemically compatible with the PVC and Polycarbonate corrugated roofing panels and only fasteners with an EPDM washer should be used in applying these panels. Two-inch fasteners are recommended for roofing applications to provide firm attachment and maximum holding power.