Plastite® 48 Trilobular™ Thread Forming Screws are the high-performance solution for fastening thermoplastics and reinforced plastics. They are available in twin-helix and single-helix thread forming styles, and can be used with any external or internal head design. They come in sizes ranging from #00 to 5/16" (M1.12 to M8.51), in pan, hex washer and flat head styles as standard, with a 48º thread profile for thermoplastics (shown here), or a 45º thread profile for less compressible plastics.