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Designed as an alternative to the traditional coach screw mainly used for timber to timber applications. Coated with a patented multi-layer corrosion-resistant plating to withstand 1,000 hours salt spray test, this screw is ideal for external applications.. Quantity: 50• Hex head countersunk with a fixed washer• Long lasting plating withstands up to 1,000 hours of salt spray resistance in accordance with BS EN 9227:2012• Patented lubrication, designed to enhance screw insertion time and provides greater resistance to corrosion• Helix shank for removing debris and improving clamping• 50° deep single thread to provide a secure fixing with high pull-out resistance• Single slash point to reduce torque and the risk of timber splitting at low edge distance