S-90399A197 Length 3/4" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-phosphate steel construction for extended service life in demanding industrial environments
• Enhanced load distribution through wide truss head design combined with integrated flat steel washers
• Maximum holding power achieved through thread-forming technology that creates stronger, vibration-resistant connections
• Optimized for sheet metal applications with fully threaded design and pointed tip for easy starting and secure fastening
• Precision compatibility with No. 29 drill bits (0.136" diameter) for accurate installation and reduced assembly time
• Reliable drive performance with Phillips No. 2 drive system preventing cam-out and ensuring consistent torque application
• Industry-standard compliance with A/AB tapping screw specifications for guaranteed interchangeability and performance

Professional Applications & Engineering Value

These No. 8 Phillips Truss Head tapping screws deliver exceptional engineering value in sheet metal fabrication and assembly applications. The thread-forming technology eliminates the need for pre-tapped holes, creating stronger, more reliable threads in base materials while reducing installation time and labor costs. The combination of black-phosphate steel construction and integrated flat washers provides superior corrosion protection and load distribution, preventing material deformation and maintaining joint integrity under vibration and dynamic loads. Engineered specifically for use with No. 29 drill bits and capable of handling up to 0.025" maximum drilling thickness, these industrial-grade fasteners ensure precise, repeatable installations across manufacturing, HVAC, automotive, and electrical enclosure applications where vibration resistance and long-term reliability are critical.

Specification Summary & Compliance

These thread forming screws feature precise 0.164" thread diameter with 15 threads per inch and comply with standard Class 2A thread tolerances. Manufactured to A/AB tapping screw specifications, they ensure consistent performance and interchangeability. The fully threaded design with right-hand threading provides maximum engagement throughout the fastener length. All components meet industry standards for material composition and are manufactured in compliance with RoHS and REACH environmental directives, making them suitable for various industrial applications requiring reliable, corrosion-resistant sheet metal fastening solutions.