S-92620A880 3/4"-16 x 5 1/2" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 150,000 psi tensile strength for reliable performance in high-stress applications
• Superior corrosion resistance through zinc yellow-chromate plating, extending service life in harsh environments
• Precise thread engagement with Class 2A fit and UNF fine threading for secure, vibration-resistant connections
• Maximum hardness durability with Rockwell C33 rating, maintaining structural integrity under repeated stress
• Full-threaded design providing consistent gripping power along the entire 5½" length
• Heavy-duty hex head with 1⅛" width for superior torque application and easy installation
• Industry-standard compliance meeting ASME B18.2.1 and SAE J429 specifications for guaranteed quality

Professional Applications & Engineering Value

These Grade 8 hex head screws deliver critical engineering solutions for industrial applications where failure is not an option. The 150,000 psi tensile strength and Rockwell C33 hardness make them ideal for heavy machinery, structural steel connections, and equipment subjected to dynamic loads and vibration. The zinc yellow-chromate plating provides essential corrosion protection in manufacturing facilities, outdoor installations, and marine-adjacent environments. With 3/4"-16 UNF fine threading and Class 2A thread fit, these fasteners ensure precise alignment and secure fastening in critical assemblies, reducing maintenance downtime and preventing costly equipment failures. The external hex drive and substantial head dimensions allow for high-torque installation, making them particularly valuable in construction, automotive, and industrial manufacturing applications where reliability is paramount.

Specification Summary & Compliance

This heavy-duty hex head screw features precise Class 2A thread fit with 3/4"-16 UNF fine threading in right-hand direction, manufactured to exacting dimensional standards. The fastener complies with ASME B18.2.1 and SAE J429 Grade 8 specifications, ensuring consistent quality and performance. Manufactured from high-strength steel with zinc yellow-chromate plating for corrosion resistance, this fully threaded fastener meets industry standards for dimensional accuracy and mechanical properties, providing reliable performance in demanding industrial applications.