Zinc-plated. For fixing wood to sheet metal or steel purlins. Suitable for 3.5mm Sheets Double-Countersunk Head with Underhead Ribs 60° Self-Tapping Thread Zinc-Plated Carbon Steel Construction Fully Threaded Tapered Shank

Heavy duty timber and deck Joist Screw to replace coach screws or coach bolts. Hardened and countersunk for a neat, flush finish. Coarse thread for high pull-out retention. Star recess allows high insertion torque. No pilot hole required. Net-coat green...