S-90398A197 Length 3/4" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with chrome-plated steel construction for extended service life in demanding industrial environments
• Enhanced load distribution through the integrated steel flat washer that prevents surface damage and maintains joint integrity
• Efficient thread-forming design creates strong, permanent threads in sheet metal without requiring pre-tapped holes
• Wide truss head profile provides excellent bearing surface and prevents pull-through in thin materials
• Optimized drilling compatibility with No. 29 drill bits for precise installation in materials up to 0.025" thickness
• Reliable Phillips drive ensures secure tool engagement and consistent installation torque
• Full threading with pointed tip enables quick starts and smooth penetration for faster assembly operations

Professional Applications & Engineering Value

These chrome-plated steel tapping screws deliver exceptional performance in sheet metal fabrication and industrial assembly applications. The thread-forming A/AB tapping screw design eliminates the need for separate tapping operations, significantly reducing installation time and labor costs. The integrated flat washer distributes clamping force evenly, preventing damage to delicate sheet metal surfaces while maintaining vibration resistance. The fully threaded configuration with right-hand threading ensures maximum grip length and pull-out strength, making these Phillips truss head screws ideal for HVAC systems, electronic enclosures, automotive panels, and construction applications where reliable fastening in thin materials is critical.

Specification Summary & Compliance

This No. 8 x 3/4" tapping screw features precise 0.164" thread diameter with 15 threads per inch and complies with standard A/AB tapping screw specifications. The screw meets Class 2A thread tolerances for consistent performance and is designed for use with No. 29 drill bits (0.136" diameter). Manufactured from high-strength steel with chrome plating for corrosion protection, these screws are suitable for maximum drilling thickness of 0.025" in sheet metal applications. All components comply with industry standards for material composition and performance requirements.