S-90627A137 Length 1/2" ASME B18.6.3 Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black zinc-plated steel construction, extending service life in demanding environments
• Efficient thread forming design eliminates need for pre-drilling in plastic materials, reducing installation time and labor costs
• Optimized plastic engagement with 16 threads per inch and 0.216" thread diameter for maximum holding power
• Reliable drive performance with Phillips No. 2 drive style preventing cam-out during installation
• Secure fastening in plastic using DST thread forming technology that creates strong, permanent threads
• Industry-standard compliance with ASME B18.6.3 specifications ensuring consistent quality and performance
• Versatile pan head design with 0.373" diameter providing excellent bearing surface for various plastic applications

Professional Applications & Engineering Value

These No. 12 x 1/2" DST thread forming screws are specifically engineered to address common challenges in plastic fastening applications. The black zinc-plated steel construction provides essential corrosion protection while the thread forming technology eliminates the risk of plastic cracking or stress fractures common with traditional fastening methods. The fully threaded blunt tip design ensures smooth material displacement during installation, creating strong, permanent threads without the need for pre-drilled holes. This makes them ideal for high-volume manufacturing environments where plastic assembly efficiency and reliability are critical. The combination of Phillips drive compatibility and standardized ASME B18.6.3 compliance ensures these screws integrate seamlessly into existing production processes while delivering consistent performance across various plastic materials.

Specification Summary & Compliance

These tapping screws feature precision thread forming technology with a 0.216" thread diameter and 16 threads per inch configuration. The 1/2" length and fully threaded design provide complete engagement in plastic materials. Manufactured to ASME B18.6.3 specifications, these screws ensure dimensional accuracy and performance reliability. The black zinc-plated finish meets industry standards for corrosion resistance, while the recommended No. 19 drill bit size (0.166" diameter) provides optimal hole preparation guidance for professional installation.