Timco Zinc Round Head Screws For general applications into softwoods and various types of hardwood. Designed and manufactured to BS 1210 Standards - major diameter and threads excepted. 25 sharp point and single leading thread for a fast start and improved thread acceptance. 60 Twin-threads with parallel shank for faster insertion and greater pull out resistance. Large core diameter for extra strength. Surface hardened up to 750 HV to prevent torque shearing under load and a core hardness of up to 450 HV for improved ductility. Plated in zinc 3-5 microns. Made from C10-18 Steel to ensure consistent quality. Full batch-traceability to the original steel mill certificate.
