S-90385A346 Length 1 1/2" ASME B18.6.3 Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for long-lasting performance in demanding environments
• Excellent thread-forming capability creates strong, permanent threads in plastic materials without pre-tapping
• Optimized for plastic applications with blunt tip design to prevent material splitting and ensure secure fastening
• Full threading along the entire 1-1/2" length provides maximum grip and holding power in plastic substrates
• Reliable Phillips drive system ensures efficient installation with standard No. 2 drive tools
• Pan head design offers low-profile seating and improved clamping force distribution
• Industry-standard compliance with ASME B18.6.3 specifications guarantees consistent quality and performance

Professional Applications & Engineering Value

These No. 8 zinc-plated steel tapping screws are specifically engineered for plastic fastening applications where traditional screws may fail. The thread forming design (DST type) creates precise mating threads in plastic materials without removing material, eliminating chips and ensuring vibration-resistant connections. The blunt tip prevents plastic splitting during installation, while the fully threaded shank maximizes engagement depth for superior pull-out resistance. Ideal for industrial assembly, electronic enclosures, automotive plastic components, and construction applications requiring reliable corrosion-resistant fastening. The combination of zinc plating and steel construction provides durability against environmental factors while maintaining cost-effectiveness for high-volume production needs.

Specification Summary & Compliance

This tapping screw features a No. 8 size with 1-1/2" length, 0.164" thread diameter, and 18 threads per inch in right-hand orientation. Manufactured to ASME B18.6.3 standards with precise dimensional tolerances, the screw utilizes thread forming technology specifically designed for plastic substrates. Recommended drill bit size is No. 30 (0.1285" diameter) for proper hole preparation. The product meets industry specifications for quality assurance and performance in plastic fastening applications, ensuring reliable installation and long-term service life in commercial and industrial settings.