S-90398A244 Length 5/8" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with chrome-plated steel construction for extended service life in demanding environments
• Enhanced load distribution through integrated steel flat washer that prevents surface damage and maintains joint integrity
• Exceptional holding power with thread-forming design that creates strong, permanent threads in sheet metal without pre-tapping
• Optimized for sheet metal applications with pointed tip and fully threaded design for quick starts and maximum thread engagement
• Wide truss head profile provides larger bearing surface for improved stability and reduced risk of pull-through
• Reliable Phillips drive system (No. 2 size) ensures secure installation with common tools while minimizing cam-out
• Precision compatibility with No. 21 drill bit (0.159" diameter) for perfect fit in 0.025" maximum thickness sheet metal

Professional Applications & Engineering Value

These chrome-plated steel tapping screws with integrated flat washer solve critical challenges in sheet metal fabrication and assembly. The thread-forming A/AB tapping screw design eliminates the need for separate tapping operations, significantly reducing installation time and labor costs while creating stronger, more reliable threads than traditional cutting screws. The fully threaded construction with 12 threads per inch ensures maximum engagement throughout the material thickness, preventing loosening under vibration and thermal cycling. The combination of chrome plating and steel construction provides excellent corrosion resistance for indoor and protected outdoor applications, while the Phillips truss head with wide bearing surface distributes clamping force effectively across delicate sheet metal surfaces, preventing distortion and maintaining structural integrity in HVAC systems, electronic enclosures, and industrial equipment assemblies.

Specification Summary & Compliance

These No. 10-12 x 5/8" tapping screws feature precision 0.19" thread diameter with right-hand threading and Class 2A thread tolerances for consistent performance. Manufactured to A/AB tapping screw standards with fully threaded construction and pointed tip for efficient thread forming. The integrated steel flat washer measures 1/2" OD and complements the chrome-plated steel construction. Compatible with No. 21 drill bit (0.159" diameter) for 0.025" maximum drilling thickness applications. These industrial fasteners comply with relevant industry standards for sheet metal fasteners and are suitable for various industrial and commercial applications requiring reliable mechanical fastening solutions.