#9 Stainless Steel TAN 9 x 1-1/2 Inch Long Sheet Metal Roofing Screws-Stainless Steel screws are ultimate in corrosion resistance in high humidity areas - no corrosion-Stainless Steel Screws are backed by a 50 Year Manufacturer Warranty against manufacturing defects-These Stainless Steel screws have a 1/4 Inch Hex Screw Head for easy driving-The 1/2" EPDM washer seals the screws to the roofing panel to prevent leaking-Rough Estimation - Regular Roofing Project Should Require 80 Screws per 10' x 10' Section of RoofingPlease keep in mind when choosing the best screw color to match your roofing that differences in computer screens, in sheet metal roofing production and roofing screw production, the color you order and the color of your roofing may vary to some degreeONLY screw head is painted to ensure EPDM washer seals to metal roof. NO paint on the threads to maximize holding strength.9 x 1-1/2 Stainless Steel TAN Sheet Metal Roofing Screws All our metal roofing screws use EPDM Washers to seal the screw to metal roofing panel to stop leaking. Our metal roofing screws EPDM washers hold up well to ozone, temperature extremes, ultraviolet radiation, and other harsh outdoor environmental conditions. The EPDM Washer is Bonded to a Galvanized Steel Washer Prevent Sealing Issues Due to Fluctuating Temperature Ranges. Compared to Neoprene Washers, the EPDM Temperature range of -60 to 350 F is Far Superior to Neoprene washers which have a much narrower temperature rangeWhen Installing these screws we recommend using screw-gun with torque control or a depth sensing feature. Impact tools are not recommended