5.5mm x 55mm / 65mm / 80mm - Timco Heavy Section Tek Screws - Hex - EPDM Washer - Self-Drilling - Exterior (Pk100)

Built for demanding outdoor applications, these heavy-section Tek screws feature a self-drilling point for easy penetration into metal or timber. The hex head with integrated EPDM washer creates a weatherproof seal, preventing leaks and corrosion. With a 5.5mm thick shank and in lengths of 55mm / 65mm or 80mm  they provide exceptional strength for structural fastening. Sold in a 100-pack for efficiency on roofing, cladding, and exterior projects.