General description Forgefix TechFast Roofing Sheet to Steel Hex 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 60mm Effective Thread Length: 33mm Pack Size: 100 screws Drill Tip: No.3, suitable for self-drilling in heavy gauge steel up to 5mm Corrosion resistance: Protected by Elementech coating, salt spray tested to 1000 hours Compatibility and accessories Supplied with 16mm EPDM rubber washers Other information