4.0 x 50 C2 Strong-Fix PZ2 CSK ZYP 800 PCS

Deep recess to prevent 'cam-out', giving a precise and positive drive control on every screw
Ribs under head for improved countersinking and to give a smooth and flush finish, also prevents splitting and material damage
Dual angle thread gives an ultimate performance and an exceptionally high pull-out resistance
Patented twin cut technology for rapid "pick-up" and reduces timber splitting
Coated with a high-molecular polymer lubricant that reduces the insertion torque by up to 52% and increases rust protection up to 20 times longer than a standard zinc plating
All sizes up to and including 75mm are fully threaded and lengths 80mm and above all have 70mm thread length