S-92865A284 5/8"-11 x 8 1/2" 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 harsh industrial environments
• Optimized thread engagement with UNC coarse threading and Class 2A fit for faster assembly and secure fastening
• Enhanced durability from Rockwell C25 hardness, maintaining structural integrity under repeated stress
• Maximum grip strength through full threading along the entire 8½" length for superior holding power
• Easy installation and removal with external hex drive design allowing high torque application
• Industry-standard compliance ensuring interchangeability and reliability across industrial applications

Professional Applications & Engineering Value

This Grade 5 steel hex head screw delivers critical engineering solutions for heavy-duty industrial applications where vibration resistance and structural integrity are paramount. The combination of UNC coarse threading and Class 2A thread fit ensures rapid assembly while maintaining precise tolerances, significantly reducing installation time in production environments. The zinc plated finish provides essential corrosion protection for machinery, structural steel connections, and equipment subjected to demanding operational conditions. With full threading along the entire 8½" length, this fastener distributes clamping force evenly across the entire engagement area, preventing joint failure in high-stress applications. The external hex drive design accommodates high torque requirements, making it ideal for construction, manufacturing, and heavy equipment maintenance where reliable fastening solutions are critical to operational safety and performance.

Specification Summary & Compliance

This 5/8"-11 UNC hex head screw features precise Class 2A thread fit tolerances and complies with ASME B18.2.1 and SAE J429 manufacturing specifications. The fastener meets RoHS 3 (2015/863/EU) compliance requirements, ensuring environmental regulatory adherence. Manufactured from Grade 5 steel with Rockwell C25 hardness and 120,000 psi tensile strength, this fully threaded fastener maintains dimensional accuracy and mechanical properties consistent with industrial standards for reliable performance in professional applications.