TWIN THREADED 4 X 1/2" BZP ROUNDHEAD WOODSCREWS

A traditional twin-thread woodscrew with single lead start for a fast installation. Roundhead screw used for clamping to flat surfaces or to achieve a high aesthetic finish. • Partially threaded from 1 1/4” and above • Made from C10-18 steel to ensure consistent quality • 60° twin-threads with parallel shank for faster insertion and greater pull-out resistance • Surface hardened to prevent torque shearing under load and core hardened for improved ductility • 25° sharp point and single lead for a fast start and improved thread acceptance