Zinc plated. These coach screws are tough, reliable and easy to use with a sharp tip and coarse thread, ensuring a firm and secure fit. The traditional hexagon head allows for greater torque with a socket driver. They are perfect for fixing to timber in fencing and joinery applications. Zinc-plated for durability. Conforms to DIN571 standards. Widely used in conjunction with nylon wall plugs, particularly in the satellite industry. Head: Hexagon Head. Finish: Zinc Plated. Single Thread Screw. Country of Origin: China.