General description Forgefix TechFast Roofing Sheet to Steel Hex Heavy-Duty Screws are designed for securely joining metal roofing panels to steel frame buildings. These screws are fire resistant and feature a corrosion-resistant coating, ensuring durability and longevity in various environments. Technical specifications Size: 5.5 x 80mm Effective Thread Length: 71mm Head Type: 8mm Hex Pack Size: 100 Drill Tip: No.5 for self-drilling in heavy gauge steel up to 12.5mm Other information Protected by Elementech corrosion-resistant coating, salt spray tested to 1000 hours Supplied without washer MPN: TFHUWSD5580H EAN: 5028485195139