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Power Pro Self-Drilling Metal Roofing Screws (Metal-to-Metal Stitch)Hillman Item #117878
Power Pro metal-to-metal self drilling stitch screws are used to stitch at the overlap location and to plug holes in steel panels. 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. These screws feature a type AB thread form. This provides maximum pullout strength in 14 & 12 gauge purlins / beams. The self drilling point is designed to penetrate metal purlins consistently with no point walking.