Self Threading Screws

As the name suggests, self threading screws form their own mating thread on installation, and modern examples of this concept are generally known as thread forming screws. This group is usually divided into screws intended for use with plastics and those intended for metals. A clear advantage to thread forming screws is the elimination of nuts or a tapping operation, which can save money and/or reduce the amount of parts used. Another lesser known advantage to using thread forming screws is to resist vibration loosening. Because these screws make their own mating threads, there are no gaps between the male and female threads which are a big contributing cause to vibration loosening.