Truss Head/Steel Wafer Phillips Drive Self Drilling Screw 4.2 mm x 13 mm (#8 x 1/2″) – pack of 100

• Truss head screws designed with an extra wide and slightly rounded head. Phillips Drive screws have property of being self-centering, so they can take more torque without slipping.
• Self-Drilling Screws have a drill-shaped point to cut through sheet metal or steel which eliminates the need for drilling a pilot hole
• High quality tempered steel for better drilling; zinc plated Rust proof zinc coating for extra long life.
• Applications: polycarbonate sheet, shadow cover, brick ties to steel framing, roof deck to steel framing, accessories to steel framing etc
• Installation: Place a self-drilling screw into the hex head adapter. Depress the trigger of the drill slowly, while the drilling tip of the screw rests against the metal. Increase the speed of the drill when the screw finds its center. Stop drilling when the head of the self-drilling screw tightens against the surface of the metal