Hexagon Head Reduced-Tip Self-Drilling Screw 12-11x40 (Australian Type 3)

Product Features
Hexagon flange head: Compatible with socket tools, providing high torque without slipping; the flange surface, combined with a waterproof washer, prevents leakage in roofing installation and minimises damage to colour steel sheets.
Reduced-tip thread design: Transition with a smaller diameter at the tip reduces cracking when driving into solid wood, ensures smooth chip evacuation and low driving resistance, and delivers higher pull-out strength after the steel-wood connection.
Type 11 dedicated drill point: Capable of penetrating 0.4–3mm thin steel sheets in one go while simultaneously tapping into wood, making it universal for steel and wood and reducing inventory variety.
Australian Type 3 long-lasting anti-corrosion: Three-layer composite weather-resistant coating, resistant to UV, acid rain, and mild salt spray, ensuring long-term outdoor use in inland areas without rusting.
High-strength substrate: Overall quenching treatment provides a wear-resistant drill point that resists chipping and a shank with good toughness, suitable for high-frequency on-site installation.