S-90380A191 Length 5/16" Tapping Screws

Key Features & Benefits at a Glance

• Superior holding power in plastic materials through advanced TRS thread forming technology that creates permanent, vibration-resistant connections
• Excellent corrosion resistance with zinc-plated steel construction for extended service life in various industrial environments
• Optimized torque transfer and reduced cam-out with Phillips No. 2 drive design for efficient installation and reduced tool slippage
• Enhanced material displacement control thanks to the Tri-Lobe shank cross-section that minimizes stress cracking in plastic substrates
• Complete thread engagement with fully threaded design and 16 TPI configuration for maximum pull-out resistance
• Simplified installation process with blunt tip design that eliminates the need for pre-drilling in many plastic applications
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for safe use in industrial and commercial applications

Professional Applications & Engineering Value

These No. 8 x 5/16" zinc-plated steel TRS tapping screws are specifically engineered to address common challenges in plastic assembly applications. The thread forming technology creates strong, permanent threads in plastic materials without cutting or removing material, eliminating chip formation issues that can compromise electronic components or sensitive assemblies. The Tri-Lobe shank design provides superior resistance to vibration loosening while distributing stress evenly to prevent plastic cracking or failure. With their Phillips drive system and optimized 16 TPI configuration, these screws deliver reliable performance in automotive trim, electrical enclosures, consumer electronics, and industrial equipment where plastic-to-plastic or plastic-to-metal fastening requires durable, long-lasting connections. The zinc plating offers additional protection against environmental factors, making these self-tapping screws ideal for both indoor and limited outdoor applications.

Specification Summary & Compliance

This Type 2 Phillips drive tapping screw features precise No. 8 thread diameter (0.164") with 16 threads per inch and 5/16" length for consistent performance. Manufactured to industry standards for thread forming screws with TRS (Thread Rolling Screw) specifications and Class 2A thread fit tolerance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory adherence for industrial use. Compatible with No. 23 drill bit (0.154" diameter) when pre-drilling is required for specific applications.