All the features and superior performance of the Classic Multi-Purpose Screw with a corrosion resistant coating to withstand over 1,000 hours salt spray. Designed to be used with black ironmongery.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.Single slash on 25mm+ to reduce torque and the likelihood of the timber splitting when the screw is inserted close to the edge.