S-90087A894 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 harsh industrial environments
• Excellent thread-cutting performance in aluminum, brass, cast iron, and sheet metal without requiring pre-tapped holes
• Enhanced driving efficiency with Phillips No. 4 drive that reduces cam-out and improves installation speed
• Reliable coarse UNC threading (5/16"-18) provides superior holding power and faster installation in various materials
• Full threading design ensures maximum grip length and consistent fastening strength throughout the entire screw length
• Standard pan head profile offers optimal bearing surface for secure fastening and professional appearance
• Industry compliance assurance with ASME B18.6.3 specifications guaranteeing consistent quality and performance standards

Professional Applications & Engineering Value

These thread cutting tapping screws deliver exceptional value in industrial fastening applications where reliable performance in non-ferrous metals and sheet materials is critical. The zinc-plated steel construction provides essential corrosion protection while maintaining the necessary hardness for effective thread cutting action. Engineered with coarse UNC threading and F-type tapping design, these screws eliminate the need for separate tapping operations, significantly reducing assembly time and labor costs. The Phillips drive system ensures secure tool engagement during installation, minimizing stripping and improving worker efficiency. Particularly valuable in aluminum fabrication, brass components, cast iron assemblies, and sheet metal applications, these fasteners provide consistent clamping force and vibration resistance where traditional screws might fail.

Specification Summary & Compliance

This 5/16"-18 thread cutting tapping screw features precise UNC coarse threading with standard Class 2A tolerance for consistent fit and performance. The fastener complies with ASME B18.6.3 specifications and SAE J933 standards, ensuring dimensional accuracy and mechanical properties meet industrial requirements. Manufactured from quality steel with zinc plating for corrosion protection, the screw is fully threaded with a length of 3/4" and pan head design. The product is designed for use with K drill bit (0.281" diameter) and is suitable for various industrial applications requiring reliable self-tapping fasteners.