Hex Head self drilling screws, for joining roofing sheets to light gauge steel without the need to pre-drill a hole. Specification • Diameter: 4.2mm • Length: 19mm • Pack Qty: 1000 • Colour/Plating: Zinc • Max Drill Thickness: 2.5mm • Size (Imperial): 8 x 3/4 Features and Benefits • Hex Head with integral washer to increase clamping effectiveness • Coarse Thread • Classic Point for drilling into metals without the…