S-90096A440 5/16"-18 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 installation efficiency through coarse UNC thread spacing that enables faster driving and reduced assembly time
• Maximum anti-loosening security with serrated flange design that bites into material surfaces preventing vibration-induced back-out
• High-torque capability with external hex drive head that withstands rigorous installation without stripping or cam-out
• Versatile material compatibility specifically engineered for reliable performance in aluminum, brass, cast iron, and sheet metal applications
• Full-thread engagement along the entire 1/2" length ensures uniform stress distribution and superior holding power
• Precision thread cutting action with Type F tapping design that forms perfect mating threads without pre-tapped holes

Professional Applications & Engineering Value

This flanged hex tapping screw delivers exceptional engineering value in metal fabrication and assembly operations. The zinc-plated steel construction provides essential corrosion protection while maintaining high tensile strength for structural integrity. The thread cutting design eliminates the need for separate tapping operations, significantly reducing labor costs and assembly time in production environments. The combination of coarse UNC threads and serrated locking flange addresses common industrial challenges of vibration loosening and material pull-out, making it ideal for automotive components, electrical enclosures, machinery frames, and sheet metal assemblies. The external hex drive ensures reliable torque transmission during high-volume installation, while the blunt tip facilitates proper alignment in various metal substrates including aluminum, brass, and cast iron.

Specification Summary & Compliance

This 5/16"-18 UNC tapping screw features Class 2A thread tolerances with coarse thread spacing for optimal performance in soft metals. Manufacturing specifications comply with ASME B18.6.3 standards (where identified as SAE J933) ensuring dimensional accuracy and mechanical properties. The product meets RoHS 3 (2015/863/EU) compliance requirements for restricted hazardous substances. Designed for use with K drill bit (0.281" diameter) for proper hole preparation, the screw delivers reliable thread forming in accordance with industrial fastening specifications.