S-94173A322 5/16"-24 x 5" 12-Point Screws

Key Features & Benefits at a Glance

• Exceptional strength and durability with 170,000 psi tensile strength and Rockwell C38 hardness, ideal for high-stress industrial applications.
• Superior corrosion resistance from the black-oxide finish, extending service life in demanding environments.
• High-torque capability due to the external 12-point drive, allowing for secure installation with standard tools.
• Reliable fine-thread engagement with UNF 5/16"-24 threads and Class 2A fit, ensuring precise, vibration-resistant connections.
• Enhanced load distribution from the integrated flange, reducing the need for separate washers and simplifying assembly.
• Optimized for partial threading, providing strong grip where needed while allowing flexibility in joint design.
• Consistent dimensional accuracy in a 5" length, supporting repeatable performance in automated or manual fastening processes.

Professional Applications & Engineering Value

This 12-point screw is engineered to address common industrial challenges such as vibration loosening and corrosion in heavy machinery, automotive assemblies, and structural frameworks. The black-oxide alloy steel construction offers robust protection against wear and environmental factors, while the UNF fine threading and Class 2A thread fit deliver tight, reliable fastening that minimizes maintenance. The flanged design enhances stability by distributing clamp load evenly, making it ideal for applications requiring high tensile strength and repeated disassembly. Its external 12-point drive allows for efficient installation in confined spaces, boosting productivity in industrial fastening operations.

Specification Summary & Compliance

This screw adheres to UNF thread standards with a Class 2A thread fit for consistent precision. Dimensions include a 5" length, 5/16"-24 thread size, and 5/8" flange diameter. Manufactured from alloy steel with a black-oxide surface treatment, it meets industry requirements for hardness and strength. Complies with relevant specifications for heavy-duty fasteners, though specific certifications like RoHS or ASME should be verified per application needs.