General description The TIMco Wing Tip Self Drilling Light Section Screws are engineered for securely attaching wood to light section steel, with a maximum thickness of 5mm. These screws feature a unique wing tip design that allows for efficient drilling and self-tapping into metal. Technical specifications Size: 5.5 x 85mm Box Quantity: 100 Colour/Plating: Zinc Head Type: Phillips Countersunk Bit Size: PH3 Usage Ideal for attaching wood to metal structures. Coarse self-tapping thread allows for high RPM drilling without overheating. Wings ream out timber and break off upon contact with metal, enabling effective self-tapping. Other information Bright zinc electrolytic plating with a clear, toxin-free finish.