• Wood screws have deep coarse threads and are specifically designed for use in wood projects. The shank of the wood screw allows the screw to spin freely inside of the outermost piece of wood and draw the inner piece tight against it by having the threaded end grip the wood and pull.
• Flat heads are countersunk with a cone shaped bearing surface and a flat top that is used in applications where the head of the fastener must sit flush with the mating surface.
