S-90385A317 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
• Efficient thread forming with DST technology creates strong, permanent threads in plastic without chip removal
• Optimized plastic engagement through blunt tip design that displaces material rather than cutting it
• Secure fastening performance with fully threaded 28 TPI design providing maximum holding power
• Quick installation using standard Phillips No. 1 drive for common tool compatibility
• Reliable dimensional consistency meeting ASME B18.6.3 specifications for industrial quality assurance
• Versatile pan head design with rounded profile for balanced clamping force distribution

Professional Applications & Engineering Value

These No. 3 zinc-plated steel tapping screws deliver exceptional value in plastic assembly applications where traditional fasteners fail. The DST thread forming technology eliminates the risk of material cracking or stress concentration by displacing plastic material rather than cutting it, creating stronger threaded connections that resist vibration loosening. The zinc-plated steel construction provides essential corrosion protection while maintaining the necessary strength for durable plastic-to-plastic or plastic-to-metal joints. With 28 TPI precision threading and 3/8" length, these screws offer optimal engagement depth for various plastic thicknesses, making them ideal for electronics enclosures, automotive trim components, and consumer product assemblies where reliable, vibration-resistant fastening is critical.

Specification Summary & Compliance

These thread forming screws feature a 0.099" thread diameter with 28 TPI precision and are manufactured to ASME B18.6.3 standards for dimensional accuracy and performance reliability. The zinc-plated steel construction meets industry requirements for corrosion resistance, while the Phillips No. 1 drive ensures compatibility with standard installation tools. The fully threaded design with blunt tip and pan head style provides consistent performance across plastic assembly applications, with compliance to recognized industrial specifications for quality assurance in manufacturing environments.