Twin-Cut Cement Board Countersunk Exterior Silver Screws – 4.2 x 42

Specifically designed for fixing cement board to timber and thin sheet metal (max. 0.6mm). Self countersinking head for a secure and flush finish. Twin-cut point with a hi-low thread. Exterior grade coating for superior corrosion resistance in damp or corrosive environments, when compared to standard fasteners.Organic plating withstands 1,500 hours in salt spray test.Fixing to timber and thin sheet metal (max. 0.6mm).Twin-cut for rapid “pick-up” and reduce torque.Ribs under the head for improved countersinking.