DIYUK Hex Head Self-Drilling Roofing Screws 4.8 x 20mm - 16mm EPDM Sealing Washer - Pack of 10

Hardened self-drilling point pierces, taps and fastens thin steel sheet in one pass, with no pre-drilling required in typical roofing or cladding gauges. Head and point made to the DIN 7504-K profile, the recognised pattern for hex-washer-head self-drilling screws, for a consistent drill-and-thread action. Bonded 16mm EPDM washer forms a weatherproof seal around every fixing point and accommodates a small amount of thermal movement without losing its seal. Hex washer head with an 8mm across-flats drive suits a standard nut-setter on an impact driver or variable-speed drill for fast, consistent driving. Zinc-plated 4.8mm (No.10 gauge) fully threaded shank, CE marked under a European Technical Assessment, with a recommended install torque of approximately 3Nm (26.5 lb-in).