TIMCO Classic Multi Purpose Screws PZ Double Countersunk 4.5 x 25 Gold Box of 200

Double countersunk reduces the likelihood of head shear and assists completion of countersinking Patented lubrication, designed to enhance screw insertion time and provides greater resistance to corrosion 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, Weight: 0.8377565956 pounds, Manufacturer: TIMco