Roofing Stitching Screws (For Sheet to Sheet). Washered Hex Head Screw. Steel Sheet to Steel Sheet. Head: Hexagon with Self-Drilling Point. Finish: New 'Elementech' coating for superior anti-corrosion - salt spray tested to 1000 hours. Self-drilling point enables improved and speedy insertion when joining sheets. Designed specifically for joining cladding sheets together. Can join up to three sheets of 0.7mm thickness. The 16mm rubber washer beneath the aluminium flange expands under pressure and forms a permanent weather-seal.
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