The right fastener makes all the difference when it comes to assembling components. Thread forming screws are a versatile and reliable solution for wood, plastic, or sheet metal materials that don’t already have threaded holes. These screws eliminate the need for tapping, as they create the necessary threads directly within the material during installation. Here, we’ll explore how thread forming screws work, how to install them, and their many applications.
How Thread-Forming Screws Work
Thread-forming screws fall under the self-tapping category of fasteners. What sets them apart is how they interact with the material they’re driven into. Rather than cutting away material to create threads, these screws displace the material around them, creating internal threads that perfectly mate with the screw.
Thread forming screws often have a progressive tip that gradually widens the contact point in small steps, allowing the material to shift. These screws don’t have a sharp edge to cut through the material — instead, they use progressive action to gradually displace or compress the material to create space for the threads to engage. The result is a tight, secure fit that won’t loosen due to vibration.
How to Install Thread-Forming Screws
Installing thread forming screws is a pretty straightforward process, involving these steps:
- Choose the Right Point Style: Before actually installing the screw, you have to make sure you’re using the best point style for your application. Thread forming screws are typically available with sharp or blunt points. Sharp points are more suitable for softer materials, while blunt points work better for harder materials.
- Create a Pilot Hole (Optional): Depending on the screw type and material, you may need to first drill a pilot hole to help guide the screw. However, some thread forming screws can be drilled directly into the material.
- Drive the Screw: Using a drill or screwdriver, drive the screw into the material. The screw will form its own threads as it turns.
After installing thread forming screws, they can be easily removed and reinstalled without losing thread integrity.
Applications of Thread-Forming Screws
Thread-forming screws are used in a wide range of industries and applications due to their adaptability and reliability. They are particularly well-suited for use in softer materials such as:
- Plastics: These screws are ideal for electronic enclosures, automotive parts, and other plastic assemblies where cutting threads could weaken the material. Thread forming screws ensure a secure fit for more fracture-prone components.
- Thin Sheet Metal: HVAC systems, ductwork, and similar applications benefit from thread-forming screws, as they create durable threads even in thin metals that can’t support thread cutting.
- Composite Materials: Thread forming screws are well-suited for composites, where maintaining the structural integrity of the material is essential for a strong connection.
Contact Associated Fastening for Thread-Forming Screws
At Associated Fastening, we’ve spent over 35 years developing fastening solutions that combine innovation and quality. Our extensive selection of thread forming screws, washers, bolts, and other specialized fasteners is designed to meet the needs of any project.
When you partner with Associated Fastening, you gain access to expert engineering support and a commitment to delivering high-performance products tailored to your applications. For more information about our thread forming screws or other fastening solutions, contact us or request a quote today.