4.5x30 Classic Multi-Purpose Screws PZ Double Countersunk ZP. Box of 200

• Double countersunk reduces the likelihood of head shear and assists completion of countersinking
• 40° deep single thread to provide a secure fixing with high pull-out resistance
• Surface hardened up to 750 HV to prevent torque shearing under load and a core hardness of up to 450 HV for improved ductility
• Single slash on 25mm+ to reduce torque and the likelihood of the timber splitting when the screw is inserted close to the edge