S-92865A448 5/8"-18 x 5" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 120,000 psi tensile strength for reliable performance in demanding applications
• Superior corrosion resistance through zinc plating, extending service life in various industrial environments
• Precise thread engagement with Class 2A fit and UNF fine threads ensuring secure, vibration-resistant connections
• Optimized drive efficiency with external hex head design providing maximum torque application and installation control
• Enhanced material durability from Grade 5 steel with Rockwell C25 hardness for long-term structural integrity
• Full-threaded design offering consistent gripping strength along the entire 5" length for uniform load distribution
• Regulatory compliance assurance meeting ASME B18.2.1/SAE J429 standards and RoHS 3 environmental directives

Professional Applications & Engineering Value

This Grade 5 hex head screw delivers critical engineering solutions for heavy-duty industrial applications where fastener failure is not an option. The combination of 120,000 psi tensile strength and Rockwell C25 hardness provides exceptional resistance to shear forces and structural stress, making it ideal for construction, machinery assembly, and equipment manufacturing. The zinc plated finish protects against corrosion in challenging environments, while the 5/8"-18 UNF fine threads with Class 2A fit ensure precise mating with corresponding nuts and threaded components. The external hex drive design allows for high-torque installation, reducing the risk of stripping during assembly in confined spaces. These fully threaded fasteners maintain consistent clamping force across the entire 5" length, providing reliable performance in vibration-prone applications where joint integrity is paramount.

Specification Summary & Compliance

This hex head screw features precise Class 2A thread fit with UNF (Unified National Fine) thread form measuring 5/8"-18. Manufacturing complies with ASME B18.2.1 specifications and SAE J429 Grade 5 requirements, ensuring dimensional accuracy and mechanical properties. The product is RoHS 3 (2015/863/EU) compliant for environmental safety and meets industry standards for heavy-duty industrial fasteners with verified 120,000 psi tensile strength and Rockwell C25 hardness ratings.