S-90096A405 5/16"-18 x 3/4" 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 environments
• Efficient installation through thread-cutting design that eliminates the need for pre-tapped holes in materials like aluminum and cast iron
• Enhanced load distribution with integrated flange design (0.676" diameter) that replaces the need for separate washers
• Versatile drive options with combined external hex/slotted head for compatibility with various tools and torque requirements
• Reliable coarse threading (UNC 5/16"-18) providing excellent holding power in softer materials and faster installation
• Full-thread engagement along the entire 3/4" length for maximum grip strength and vibration resistance
• Industry-standard compliance meeting ASME B18.6.3 specifications for consistent quality and performance

Professional Applications & Engineering Value

This heavy-duty flanged tapping screw delivers exceptional engineering value by solving critical fastening challenges in sheet metal fabrication, aluminum assemblies, and cast iron components. The zinc-plated steel construction provides essential corrosion protection while maintaining high tensile strength. The thread-cutting design (Type F) creates precise mating threads in parent materials, eliminating costly tapping operations and reducing assembly time. The combination of external hex/slotted drive offers flexibility for both high-torque applications and quick adjustments. With UNC coarse threading and full-length engagement, these screws provide superior pull-out resistance in soft metals and plastics, making them ideal for industrial construction and manufacturing applications where vibration resistance and long-term reliability are paramount.

Specification Summary & Compliance

This 5/16"-18 flanged tapping screw features precision UNC coarse threads with standard Class 2A tolerances for consistent fit. Manufactured to meet ASME B18.6.3 specifications (SAE J933) for dimensional accuracy and performance reliability. The product is fully RoHS 3 (2015/863/EU) compliant for environmental safety and regulatory requirements. Designed for use with standard 0.281" drill bit (Size K) for proper hole preparation in various materials including aluminum, brass, cast iron, and sheet metal applications.