Typically machine screws are designed to be fastened to an existing tapped hole on a metal surface, usually in conjunction with a corresponding nut. Extensively used in multitude of industries including electrical, electronic consumer appliances, switch gear, automobile ancillaries, watch & Mobile phones manufacturers. The shape of the head will determine how the machine screw lies once it’s fastened in place. Round and Pan heads will protrude from a flat surface, while flat head machine screws are designed for holes that are countersunk so that they lay flush with the surface.