Features:

• Double countersunk reduces the likelihood of head shear and assists completion of countersinking
• Patent lubrication, designed to enhance screw insertion time and provides greater resistance to corrosion
• 40degree deep single thread to provide a secure fixing with high pull-out resistance
• Surface hardened up to 750HV to prevent torque shearing under load and a core hardness of up to 450HV for improved ductility
• All sizes up to and including 75mm are fully threaded and lengths 70mm and above all have 70 thread length