Phillips Rounded Head Thread-Forming Screws

Our most popular thread-forming screws for plastic also resist rust. Thread them directly into molded or cast holes—no inserts needed. Screws won’t crack or distort material when fastening enclosures, panels, and other plastic components. The Phillips drive handles enough torque to keep drivers from slipping and the rounded head creates a finished look.

Length is measured from under the head.

18-8 Stainless Steel—The choice for wet and outdoor environments. However, these screws won't hold up to the harsh chemicals that 316 stainless steel can.

Tri-Lobe—The tri-lobular shank forms threads in thermoplastics such as polypropylene and ABS. These screws displace material to create a tight fit that resists vibration and prevents backing out. Because the shank isn't round, the diameter will vary slightly depending on where you measure it. They're comparable to Plastite screws.