These Forgefix Tec Fix Roofing Screws are self drilling, with a hexagonal head. They come complete with a 16mm composite aluminium/rubber washer.
Suitable for use when fixing sheet material to light section purlins 1.2mm to 3.6mm.
Self-drilling screws have a drill-shaped point to cut through the substrate to eliminate the need for drilling a pilot hole. They are designed for use in soft steel or other metals.
The hexagonal head has been designed for use with spanners or sockets and offers maximum torque when used with these tools.