The working of the self tapping screw is very simple. These machine screw are capable of drilling holes onto the surfaces to seal all by itself. This happens due to the fact that there are tiny tunnels on the tip of the self tapping screws that help in creating a hole when they are hit against the metal. The important criteria to note is that these screws are very useful for all the products which require regular maintenance in the house. To mention a few in the category they are objects like home air-conditioners or the regular canopies which are very often assembled and dissembled.