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Thread forming screw is a generic term for any type of screw that forms its own threads into the mating material. The obvious 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.