S-91247A906 7/8"-9 x 10" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 PSI ensures reliable performance in demanding industrial applications, reducing the risk of fastener failure.
• Superior corrosion resistance with zinc plating protects against rust and environmental damage, extending service life in harsh conditions.
• Heavy-duty Grade 5 steel construction with Rockwell C25 hardness provides excellent durability and resistance to wear and deformation.
• Coarse UNC thread pattern with Class 2A fit allows for quick assembly and secure fastening, minimizing installation time and improving efficiency.
• Partially threaded design offers optimal grip and clamping force where needed, enhancing joint stability in structural applications.
• External hex drive enables easy installation and removal with standard tools, streamlining maintenance and repair processes.
• Compliance with industry standards including ASME B18.2.1 and SAE J429 ensures consistent quality and interoperability in machinery and construction projects.

Professional Applications & Engineering Value

This Grade 5 steel hex head screw is engineered to address critical challenges in heavy-duty industrial settings, such as structural assembly, machinery fabrication, and construction projects. The coarse UNC thread pattern and Class 2A fit provide superior engagement and vibration resistance, reducing loosening in high-stress environments. Made from high-strength steel with a zinc-plated finish, it combats corrosion and extends lifespan in outdoor or humid conditions. The partial threading design concentrates clamping force effectively, preventing joint slippage and ensuring reliable performance in applications like equipment frames, bridges, and industrial machinery. By meeting rigorous standards, this fastener delivers consistent engineering value through enhanced safety, reduced maintenance, and long-term cost savings.

Specification Summary & Compliance

This fastener features precise Class 2A thread fit and adheres to UNC thread standards with a size of 7/8"-9. It complies with ASME B18.2.1 and SAE J429 manufacturing specifications, ensuring dimensional accuracy and reliability. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for industrial use.