S-92620A804 5/8"-11 x 2 1/2" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Maximum load-bearing capacity with 150,000 PSI tensile strength and Grade 8 classification for demanding industrial applications
• Superior corrosion protection through zinc yellow-chromate plating that extends service life in harsh environments
• Optimized thread engagement with UNC coarse threads and Class 2A fit ensuring reliable installation and vibration resistance
• Full-threaded design provides consistent clamping force along the entire 2½" length for secure fastening
• High-strength steel construction with Rockwell C33 hardness maintains structural integrity under extreme stress
• External hex drive compatibility with standard 15/16" wrench sizes for straightforward installation and removal
• Comprehensive regulatory compliance meeting ASME B18.2.1, SAE J429, RoHS 3, and REACH standards for quality assurance

Professional Applications & Engineering Value

These Grade 8 hex head screws deliver exceptional performance in heavy-duty industrial applications where failure is not an option. The combination of high-strength steel material and zinc yellow-chromate plating addresses critical challenges in construction, machinery assembly, and structural frameworks by providing both superior tensile strength and enhanced corrosion resistance. The 5/8"-11 UNC coarse threads with Class 2A thread fit ensure rapid installation and reliable performance in vibration-prone environments, while the external hex drive design accommodates standard industrial tools for efficient maintenance operations. These fully threaded fasteners maintain consistent clamping force across the entire 2½" length, making them ideal for critical joints in heavy equipment, structural steel connections, and industrial machinery where maximum durability and long-term reliability are paramount requirements.

Specification Summary & Compliance

This 5/8"-11 hex head screw features precision UNC coarse threads with Class 2A thread fit tolerance for optimal engagement. Manufacturing conforms to ASME B18.2.1 and SAE J429 specifications for dimensional accuracy and performance. The fastener maintains full compliance with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations for chemical safety, ensuring environmental responsibility while delivering Grade 8 strength performance with 150,000 PSI tensile strength and Rockwell C33 hardness certification.