S-92620A759 9/16"-12 x 1 1/4" 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 the most demanding heavy-duty applications, preventing fastener failure under extreme loads.
• Superior corrosion resistance from the zinc yellow-chromate plating protects the screw in harsh industrial environments, extending service life and reducing maintenance needs.
• High-strength Grade 8 classification and Rockwell C33 hardness guarantee durability and resistance to wear, making it ideal for high-stress assemblies.
• Coarse UNC thread with a Class 2A fit allows for faster installation and easier alignment, providing a secure and vibration-resistant connection.
• Full threading along the entire 1 1/4" length offers maximum grip and adjustability, ensuring a tight hold across the entire fastened material.
• External hex drive and hex head design facilitate easy installation and removal with standard tools, improving assembly efficiency on the production line.
• Compliance with major industry standards including ASME B18.2.1 and SAE J429 ensures consistent quality, reliability, and interchangeability in professional applications.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to solve critical challenges in heavy machinery, construction, and automotive assemblies where joint integrity is paramount. The high-strength steel construction, combined with a coarse 9/16"-12 UNC thread, provides superior resistance to loosening under dynamic loads and vibrations. The zinc yellow-chromate plating offers an essential barrier against corrosion, significantly increasing the fastener's lifespan in outdoor or chemically aggressive environments. Its fully threaded design and Class 2A thread fit ensure precise engagement and uniform stress distribution, reducing the risk of strip-out and enhancing the overall reliability of the bolted connection in structural and industrial applications.

Specification Summary & Compliance

This screw features a 9/16"-12 UNC coarse thread with a Class 2A thread fit for standard tolerance and easy assembly. It is manufactured to meet ASME B18.2.1 and SAE J429 Grade 8 specifications, ensuring high mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming its safety and sustainability for global industrial use.