S-90096A404 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, ensuring long-lasting performance in demanding industrial environments
• Enhanced holding power and vibration resistance thanks to the integrated flange design that eliminates the need for separate washers
• Efficient installation in tough materials with thread-cutting tip specifically engineered for aluminum, brass, cast iron, and sheet metal
• Versatile drive options featuring both external hex and slotted drive for compatibility with various installation tools
• Reliable coarse UNC threading providing excellent pull-out resistance and faster installation in softer materials
• Full threading along the entire shank ensures maximum grip and uniform stress distribution throughout the fastened joint
• Industry-standard compliance meeting ASME B18.6.3 specifications and RoHS 3 environmental regulations for quality assurance

Professional Applications & Engineering Value

These zinc-plated steel flanged hex tapping screws deliver exceptional engineering value in metal fabrication and assembly operations. The thread cutting design with F-type tapping screw geometry creates precise mating threads in aluminum, brass, and cast iron components without pre-tapping, significantly reducing installation time and labor costs. The flange integrated design provides distributed clamping force that prevents loosening under vibration, making these UNC thread fasteners ideal for sheet metal assemblies, machinery frames, and electrical enclosures where reliability is critical. The combination of external hex/slotted drive accommodates both power and manual tooling, while the zinc plating offers essential corrosion protection for industrial environments.

Specification Summary & Compliance

This 5/16"-18 coarse thread UNC tapping screw features precision Class 2A thread tolerances with 0.313" thread diameter and fully threaded 1/2" length. Manufactured to ASME B18.6.3 specifications where applicable per SAE J933 standards, ensuring dimensional accuracy and performance reliability. The product is RoHS 3 (2015/863/EU) Compliant for environmental safety and meets industry standards for thread cutting screws in metal applications requiring K drill bit size (0.281" diameter) for proper hole preparation.