S-90399A245 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 environments
• Enhanced load distribution through the integrated flat washer that prevents surface damage and improves joint integrity
• Excellent thread-forming capability creates strong, permanent threads in sheet metal without pre-tapping requirements
• Wide truss head design provides larger bearing surface for improved clamping force and vibration resistance
• Optimized for sheet metal applications with precise No. 21 drill bit compatibility for 0.025" maximum material thickness
• Reliable Phillips drive system ensures secure installation and consistent torque transmission during assembly
• Full threading delivers maximum grip length and holding power throughout the entire fastener engagement

Professional Applications & Engineering Value

These No. 10-12 x 3/4" Phillips Truss Head Tapping Screws are engineered specifically for sheet metal fastening applications where reliability and corrosion resistance are critical. The black-phosphate steel construction provides exceptional protection against environmental factors, while the thread-forming technology (A/AB type) creates secure, permanent threads that eliminate the need for separate nuts or tapped holes. The integrated flat washer distributes clamping force evenly, preventing material deformation and ensuring consistent pressure across the joint. With their fully threaded design and right-hand threading, these screws deliver maximum engagement in thin materials up to 0.025" thickness, making them ideal for HVAC systems, electronic enclosures, automotive panels, and industrial equipment where vibration resistance and long-term performance are essential.

Specification Summary & Compliance

These tapping screws feature precise 0.19" thread diameter with 12 threads per inch and comply with standard thread-forming (A/AB) specifications. The 3/4" length and fully threaded design ensure optimal engagement in sheet metal applications. Manufactured to industry standards with Class 2A thread fit for reliable performance. The black-phosphate surface treatment provides corrosion resistance while maintaining compatibility with No. 21 drill bits (0.159" diameter). These industrial fasteners meet relevant quality standards for consistent performance in professional applications.