General description ForgeFix TechFast Composite Panels to Steel Hex Screws are designed for joining composite panels to steel frame buildings. These screws feature a No.5 drill tip for self-drilling in heavy gauge steel up to 12.5mm, making them ideal for various construction applications. Technical specifications Size: 5.5 x 85mm Insulation Thickness: 37-50mm Pack Size: 100 Drill Tip: No.5 Diameter: 5.5mm Length: 85mm Manufacturer Part Number: TFHW16CPSD5585H EAN: 5028485195313 Other information Includes 16mm EPDM rubber washers Features a specially designed compression control thread to prevent damage and denting of panels Fire and corrosion resistant with Elementech corrosion resistant coating, salt spray tested to 1000 hours Image: