S-92620A917 7/8"-9 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 tensile strength of 150,000 PSI ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
• Superior corrosion resistance with zinc yellow-chromate plating extends service life in harsh environments, minimizing maintenance and replacement costs.
• High hardness rating (Rockwell C33) provides excellent wear resistance and durability under repetitive loads and vibrations.
• Coarse UNC threading allows for quicker installation and better grip in softer materials or where debris is present, improving assembly efficiency.
• Full threading along the 5 1/2" length offers maximum adjustability and holding power across the entire fastener.
• External hex drive design enables easy tightening with standard tools, facilitating secure fastening in confined spaces.
• Compliance with ASME B18.2.1 and SAE J429 standards guarantees consistent quality, interchangeability, and reliability in demanding applications.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to address critical challenges in heavy-duty industrial settings, such as construction machinery, automotive assemblies, and structural frameworks. The steel material combined with zinc yellow-chromate plating provides robust protection against rust and chemical exposure, ensuring long-term integrity in outdoor or corrosive environments. The coarse UNC thread and Class 2A thread fit facilitate rapid, secure fastening even in applications prone to vibration loosening, reducing downtime and enhancing safety. With a fully threaded design and external hex drive, it offers versatile installation options for high-torque requirements, making it an ideal choice for engineers seeking dependable, high-strength fastening solutions that meet rigorous industry standards.

Specification Summary & Compliance

This fastener adheres to precise dimensional tolerances with a Class 2A thread fit and UNC coarse thread specification (7/8"-9), ensuring compatibility and ease of assembly. It conforms to ASME B18.2.1 and SAE J429 manufacturing standards, guaranteeing consistent performance and reliability. The product meets common industry regulations for quality and safety, supporting applications that require verified mechanical properties and high tensile strength without compromising on durability or corrosion resistance.