S-90385A328 Length 5/16" ASME B18.6.3 Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, ensuring long-term reliability in various industrial environments
• Excellent thread-forming capability in plastic materials, creating strong, permanent threads without pre-tapping
• Optimized drive efficiency with Phillips No. 1 drive style, providing secure installation and reducing cam-out risks
• Maximum holding power through fully threaded design, distributing load evenly along the entire fastener length
• Precise dimensional accuracy with 20 threads per inch and standardized pan head profile for consistent performance
• Enhanced installation convenience with blunt tip design that prevents material damage during assembly
• Industry-standard compliance meeting ASME B18.6.3 specifications for quality assurance and interchangeability

Professional Applications & Engineering Value

These zinc-plated steel DST thread forming screws are specifically engineered for plastic applications where traditional fastening methods often fail. The thread forming design creates strong, clean threads in plastic materials without chips or debris, eliminating the need for additional tapping operations and reducing assembly time. The fully threaded construction ensures maximum pull-out resistance and vibration resistance, critical in applications subject to dynamic loads. The Phillips drive system provides reliable torque transmission while the zinc plating offers essential corrosion protection, making these tapping screws ideal for electronics enclosures, automotive plastic components, and industrial equipment where durability and performance are paramount.

Specification Summary & Compliance

These No. 5 x 5/16" DST screws feature precise dimensional specifications including 0.125" thread diameter, 20 threads per inch, and standard Class 2A thread tolerances for consistent performance. Manufactured in compliance with ASME B18.6.3 standards, ensuring interchangeability and quality consistency across production batches. The fasteners meet industry requirements for material composition and mechanical properties, with zinc-plated steel construction providing both strength and corrosion resistance. Suitable for use with No. 39 drill bits (0.0995" diameter) in plastic assembly applications requiring reliable thread-forming performance.