The TIMCO Solo Countersunk Silver Woodscrews are high-performance single thread woodscrews designed for use in various types of timber and man-made boards, or into masonry with plastic plugs. These zinc-plated screws feature a double countersunk head that reduces the likelihood of head shear and assists with countersinking completion. They are wax lubricated to enhance insertion time and provide extra driving torque while offering resistance to corrosion. The 40° deep single thread provides secure fixing with high pull-out resistance, while the 25° sharp point and single lead design ensures fast start and improved thread acceptance. All screws up to 75mm are fully threaded, making them ideal for professional timber construction applications.