TIMCO Classic Multi-Purpose Countersunk A2 Stainless Steel Woodcrews - 4.0 x 30

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 All sizes up to and including 75mm are fully threaded and lengths 80mm and above all have 70mm thread length, Weight: 0.00440924524 pounds, Manufacturer: TIMco