S-90385A356 Length 1/2" ASME B18.6.3 Tapping Screws

Key Features & Benefits at a Glance

• Superior plastic fastening performance with thread forming technology that creates strong, permanent threads without chipping or cracking materials
• Enhanced corrosion resistance through zinc-plated steel construction for extended service life in various industrial environments
• Optimized drive efficiency with Phillips No. 2 drive style providing reliable torque transfer and reduced cam-out during installation
• Full thread engagement along the entire 1/2" length ensures maximum holding power and vibration resistance in plastic assemblies
• Precision compatibility with No. 19 drill bits (0.166" diameter) for perfect hole matching and simplified installation processes
• Secure fastening design featuring blunt tip and pan head profile that prevents material damage while maintaining consistent clamping force
• Industry-standard compliance meeting ASME B18.6.3 specifications for reliable performance in professional applications

Professional Applications & Engineering Value

These No. 12 DST tapping screws are specifically engineered for plastic fastening applications where material integrity is paramount. The thread forming technology displaces plastic material rather than cutting it, creating stronger threads that resist stripping and maintain holding power in vibration-prone environments. Made from zinc-plated steel, these screws offer excellent corrosion protection while the Phillips drive system ensures efficient installation in high-volume assembly operations. The fully threaded design with 16 TPI provides maximum engagement in plastic components, making them ideal for industrial fastening in electronics enclosures, automotive trim, and construction applications where reliable plastic-to-plastic or plastic-to-metal connections are required.

Specification Summary & Compliance

These precision tapping screws feature a 0.216" thread diameter with 16 threads per inch and are manufactured to exacting dimensional standards. The screws comply with ASME B18.6.3 specifications for thread forming screws, ensuring consistent performance and interchangeability. The zinc-plated surface treatment provides corrosion resistance while maintaining electrical conductivity. With a standard Class 2A thread fit and right-hand threading, these screws deliver reliable performance in various plastic assembly applications while meeting industry standards for quality and dimensional accuracy.