Used for securing fibre cement profile sheets to light section steel (max. 5mm). Complete with a heavy-duty EPDM and stainless steel washer to provide a water-tight seal, also known as a BAZ washer. Features an exterior corrosion-resistant coating to withstand over 500 hours of salt spray. The exterior plating offers a reliable and durable corrosion-resistant coating that resists 500 hours of salt spray. Wings ream the enlarged hole in the roofing sheet to allow for expansion. Frequently used to secure Big 6 roofing sheets. Thread Diameter: 6.3mm, Length: 130mm, Head Type: Hex, Fixed Washer Diameter: 12.00mm, Point Type: Self-Drilling, No.3 Socket Size: 8, Finish: Exterior (Silver Organic), Material: Case & Core Hardened Carbon Steel, Effective Thread Length: 46mm, Max Drilling Thickness: 5mm.