S-90096A334 1/4"-20 x 3/4" ASME B18.6.3, SAE J933 Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in demanding industrial environments
• High-torque installation capability through external hex drive design, preventing tool slippage and ensuring secure fastening
• Self-tapping efficiency with Thread Cutting Type F design, eliminating need for pre-tapped holes in aluminum, brass, cast iron and sheet metal
• Enhanced load distribution through integrated flange design, reducing surface pressure and preventing material damage
• Reliable thread engagement with UNC coarse threading and full-length threads, providing consistent holding power across the entire fastener length
• Precision compatibility with No. 2 drill bit (0.221" diameter), ensuring proper fit and optimal thread formation in various materials
• Regulatory compliance assurance meeting ASME B18.6.3 and RoHS 3 standards, guaranteeing quality and environmental safety

Professional Applications & Engineering Value

These zinc-plated steel hex flange tapping screws deliver exceptional engineering value in metal fabrication and assembly operations. The Thread Cutting Type F design with UNC coarse threads enables direct installation without pre-tapped holes, significantly reducing assembly time and labor costs in aluminum, brass, cast iron, and sheet metal applications. The external hex drive provides maximum torque transmission during installation, while the integrated flange eliminates the need for separate washers, streamlining inventory and installation processes. The zinc plating offers reliable corrosion protection, making these tapping screws suitable for both indoor industrial equipment and outdoor applications where environmental exposure is a concern. The combination of fully threaded design and precise 1/4"-20 thread size ensures consistent clamping force throughout the fastened joint.

Specification Summary & Compliance

This 1/4"-20 hex flange tapping screw features UNC coarse threads with standard Class 2A thread tolerances for reliable fit and performance. Manufactured to meet ASME B18.6.3 specifications (referencing SAE J933 standards) for dimensional accuracy and mechanical properties. The product is RoHS 3 (2015/863/EU) compliant, ensuring environmental safety and regulatory adherence. Designed with right-hand threading and fully threaded configuration for maximum engagement in thread cutting applications across various metal substrates.