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Power Pro Self-Drilling Metal Roofing Screws (ZXL Fine Thread Metal-to-Wood)Hillman Item #117465
Power Pro ZXL metal-to-wood self drilling screws are designed to fasten steel roofing to wood purlins used in post-frame construction, plywood or OSB used in residential construction. The ZXL patented one-piece cupped head design provides a weather-tight seal & expels moisture. These screws feature 2.5 mils of powder coating with a chromate sealer, offering 3x the corrosion resistance of painted heads. The molded Zamac diecast cupped head design provides lifetime protection against red rust on both the head and washer. The threading on these screws transitions from fine to coarse in order to generate superior holding power in various wood substrates. The Micro-Bit point design reduces metal shavings that can otherwise embed themselves in the rubber washer. This feature helps the screw start fast and finish straight when driven.