S-90096A343 1/4"-20 x 4" 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
• High-torque installation capability through external hex drive design for secure fastening and reduced tool slippage
• Self-tapping efficiency with thread cutting design that eliminates need for pre-tapped holes in aluminum, brass, cast iron, and sheet metal
• Enhanced load distribution from integrated flange design that provides wider bearing surface and prevents pull-through
• Reliable thread engagement with UNC coarse spacing and full threading for maximum holding power in various materials
• Optimized material compatibility with recommended #2 drill bit (0.221" diameter) for precise hole preparation
• Industry compliance assurance meeting ASME B18.6.3 specifications and RoHS 3 environmental standards

Professional Applications & Engineering Value

This heavy-duty tapping screw delivers exceptional engineering value through its zinc-plated steel construction and thread cutting design, specifically engineered to solve common industrial fastening challenges. The flanged hex head configuration provides superior torque transmission while distributing clamping force evenly, preventing material deformation in aluminum, brass, cast iron, and sheet metal applications. The UNC coarse thread with fully threaded design ensures maximum thread engagement and pull-out resistance, while the blunt tip facilitates proper alignment during installation. This combination addresses critical pain points in manufacturing and assembly operations where reliable, high-strength fastening in untapped materials is essential for structural integrity and long-term performance.

Specification Summary & Compliance

This 1/4"-20 tapping screw features precise UNC coarse thread spacing with standard tolerance classes for consistent performance. Manufacturing and dimensional specifications strictly comply with ASME B18.6.3 standards (SAE J933), ensuring interchangeability and reliability across industrial applications. The product is RoHS 3 (2015/863/EU) Compliant, meeting current environmental regulations for hazardous substance restrictions. The 4" length with fully threaded shank and 0.52" flange diameter provides standardized dimensions for engineering calculations and assembly planning.