Thread Forming & Thread Cutting Screws

Thread Forming (or Thread Rolling) Screws form mating threads in the material into which they are driven by displacing that material so that it flows around the screw threads, creating a zero clearance fit.  Because of this exceptionally tight fit, lockwashers or other locking elements are generally not needed to prevent loosening. They are used in both metal and plastic applications, and the screws are available either blunt-tipped, lead point or pierce point.  The most common type of Thread Forming Screws are those with a Trilobular™ cross-sectional thread form, significantly reducing the friction between the screw and the mating material during the thread-forming process.