S-90385A329 Length 3/8" ASME B18.6.3 Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
• Eliminates need for pre-tapped holes with thread-forming DST design, reducing assembly time and labor costs
• Secure, reliable fastening in plastic materials with fully threaded blunt tip design that minimizes material stress
• Optimized drive performance with Phillips No. 1 drive style providing consistent torque transmission
• Precision thread engagement with 0.125" diameter and 20 threads per inch for strong holding power in plastic assemblies
• Industry-standard compliance meeting ASME B18.6.3 specifications for consistent quality and performance
• Versatile pan head design with 0.219" diameter providing reliable bearing surface without excessive protrusion

Professional Applications & Engineering Value

This No. 5-20 tapping screw delivers exceptional value in plastic assembly applications where traditional fastening methods often fail. The thread-forming DST design creates strong, permanent threads in plastic materials without the cracking or stress concentration common with cutting threads. The zinc-plated steel construction provides essential corrosion protection while maintaining the strength required for industrial applications. Engineered with a fully threaded blunt tip, this screw distributes clamping force evenly, preventing material damage in brittle plastics. The Phillips No. 1 drive ensures consistent installation across production runs, while the pan head design offers a clean appearance with reliable clamping performance. Ideal for electronics enclosures, automotive plastic components, and consumer products requiring durable, vibration-resistant fastening solutions.

Specification Summary & Compliance

This tapping screw features precise 0.125" thread diameter with 20 threads per inch and 3/8" length for standardized plastic assembly applications. Manufactured to ASME B18.6.3 specifications ensuring dimensional accuracy and performance reliability. The thread-forming DST type complies with industry standards for plastic fastening, while the zinc-plated finish provides corrosion resistance meeting industrial requirements. The screw features right-hand threading and standard class 2A thread fit for consistent performance across manufacturing applications.