TechFast Composite Panels to Steel Hex Screw Washer Range - ForgeFix TFHW19CPSD55185H, Forgefix TechFast Composite Panels to Steel Hex Screws with 19mm EPDM washers, are used to join composite panels to steel frame buildings. They have a specially designed compression control thread to prevent damage and denting of panels. They are fire and corrosion resistant, protected by Elementech corrosion resistant coating, salt spray tested to 1000 hours. Complies with EU Safety, Health and Environmental requirements. They are supplied with 19mm EPDM rubber washers.These Forgefix TechFast Composite Panels to Steel Hex Screws have the following specification: Size: 5.5 x 185mmInsulation Thickness: 92-150mmPack Size: 50Drill Tip: No.5 No.5 drill tip for self-drilling in heavy gauge steel up to 12.5mm. ForgeFix TechFast Composite Panel - Steel Hex Screw No5 19mm Washer 5.5x185mm 50