S-90096A332 1/4"-20 x 1/2" 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
• Exceptional material penetration through thread-cutting design, creating secure threads in aluminum, brass, cast iron, and sheet metal without pre-tapping
• Enhanced installation efficiency with external hex drive and flanged design, eliminating the need for separate washers while providing superior driving torque
• Reliable coarse threading with UNC 1/4"-20 specification, ensuring quick assembly and reduced cross-threading risks in various materials
• Optimized drill compatibility requiring only No. 2 drill bit (0.221"), streamlining installation processes and reducing tooling requirements
• Full-length threading with blunt tip design, providing maximum thread engagement and consistent clamping force throughout the fastener length
• Integrated flange distributing load over wider surface area, preventing material damage and maintaining joint integrity under vibration

Professional Applications & Engineering Value

These zinc-plated steel flanged hex tapping screws deliver exceptional value in metal fabrication and industrial assembly applications. The thread-cutting design eliminates the need for separate tapping operations, significantly reducing installation time and labor costs when working with aluminum, brass, cast iron, and sheet metal. The UNC coarse threading provides rapid installation while maintaining strong holding power, particularly valuable in high-volume production environments. The combination of external hex drive and integrated flange ensures secure installation with standard tools while providing superior resistance to loosening under vibration. This makes them ideal for machinery assembly, electrical enclosures, automotive components, and structural metalwork where reliability and efficiency are paramount.

Specification Summary & Compliance

These 1/4"-20 flanged hex tapping screws feature precise UNC coarse threading with full compliance to ASME B18.6.3 specifications (SAE J933). The manufacturing process ensures dimensional accuracy suitable for industrial applications, with zinc-plated steel construction providing corrosion protection. The screws are fully RoHS 3 (2015/863/EU) compliant, meeting international environmental standards for hazardous substance restrictions. Designed for use with No. 2 drill bit (0.221" diameter), these screws maintain consistent performance across various metal substrates while adhering to recognized industrial standards for quality and safety.