This roofing self-drilling screw is designed for easy installation in metal trusses or frames without pre-drilling, making it perfect for securing metal roofing panels, siding, and other exterior construction materials where durability and leak prevention are essential. Coated in yellow zinc with an EPDM washer it provides corrosion resistance, while forming a watertight seal.  The hex washer head design provides a secure drive with an M8 hex socket, ensuring stability during fastening while distributing load evenly to prevent surface damage.