Some screws have vertical cutting blades at the tip thereby avoiding the usage of external material to drill a pilot hole, these are self tapping screws because it taps any material all by itself. These are used in hard materials especially different metals (steel, aluminum, brass, etc,) and also stone or bricks whereas it is not useful for soft materials (e.g. wood). Use self tapping screws from the house of Tappex Thread Inserts Ltd, they are authenticate material provider. These have two major types,
* Thread forming Screw– It Forms a permanent thread. The best part is it can be installed multiple times without significant damage. It is used in heavy sheet metal and die castings.
* Thread cutting Screw– These cut material away to create threads and cannot be installed multiple times. It is used for plastic and other soft materials with large cutting edges and metal sheets and soft metal, like wood, plastics and plywood
These are used from home modeling to boating to advanced medical needs and also play a vital role in daily life.