S-90096A348 5/16"-18 x 3" ASME B18.6.3, SAE J933 Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, ensuring long-term reliability in harsh industrial environments
• Exceptional thread-cutting performance with Type F tapping screw design that creates strong, permanent threads in various materials
• Maximum torque transmission through the external hex head design, preventing stripping during high-torque applications
• Enhanced load distribution with integrated flange design, reducing surface pressure and preventing material damage
• Wide material compatibility for aluminum, brass, cast iron, and sheet metal applications with optimized K drill bit size (0.281")
• Reliable coarse UNC threading (5/16"-18) for faster installation and reduced cross-threading risks in production environments
• Full 3" threading provides maximum engagement strength throughout the entire fastener length

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these zinc-plated steel tapping screws deliver exceptional performance in aluminum, brass, cast iron, and sheet metal assemblies. The thread-cutting design eliminates the need for pre-tapped holes, significantly reducing installation time and labor costs in high-volume production. The flanged hex head combines the torque capability of external drive systems with the load distribution benefits of washers, preventing material deformation in thin-section applications. With coarse UNC threading and optimized drill size compatibility, these screws provide reliable fastening solutions for automotive, machinery, and metal fabrication industries where vibration resistance and long-term durability are critical.

Specification Summary & Compliance

This 5/16"-18 flanged hex tapping screw features UNC coarse threading with standard Class 2A tolerances for consistent performance. Manufactured to ASME B18.6.3 specifications and SAE J933 standards, ensuring dimensional accuracy and mechanical properties. The product is RoHS 3 (2015/863/EU) compliant and meets international environmental regulations. The 3" length with full threading provides complete engagement capability, while the zinc plating offers corrosion protection for extended service life in industrial environments.