S-90096A435 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 for extended service life in demanding industrial environments
• Enhanced locking capability through serrated flange design that prevents loosening under vibration and dynamic loads
• High-strength thread cutting performance with Type F design that creates precise mating threads in various materials without pre-tapping
• Optimized installation efficiency with external hex drive that provides secure tool engagement and high torque transmission
• Versatile material compatibility specifically engineered for aluminum, brass, cast iron, and sheet metal applications
• Reliable full-thread engagement along the entire 1/2" length for maximum holding power in thin and thick materials
• Industry-standard compliance meeting ASME B18.6.3 specifications and RoHS 3 regulations for quality assurance

Professional Applications & Engineering Value

This 1/4"-20 zinc-plated steel flanged hex tapping screw delivers exceptional engineering value in metal fabrication and assembly operations. The thread cutting Type F design eliminates the need for separate tapping operations, significantly reducing installation time and labor costs in production environments. The UNC coarse thread configuration provides excellent pull-out resistance in softer materials like aluminum and sheet metal, while the serrated locking flange creates a permanent vibration-resistant joint without requiring additional lock washers. The zinc-plated steel construction offers reliable corrosion protection for both indoor and moderate outdoor applications, making these tapping screws ideal for HVAC systems, electrical enclosures, machinery guards, and automotive components where aluminum, brass, cast iron, and sheet metal assemblies demand durable, self-tapping fastening solutions.

Specification Summary & Compliance

This flanged hex tapping screw features precise 1/4"-20 UNC coarse threads with full threading along the 1/2" length and blunt tip design. Manufactured to exacting ASME B18.6.3 standards (SAE J933) with proper thread form and dimensional accuracy. The product is fully RoHS 3 (2015/863/EU) compliant for environmental regulations and designed for use with No. 2 drill bit (0.221" diameter) for optimal thread engagement in specified materials including aluminum, brass, cast iron, and sheet metal applications.