S-92620A336 1 1/4"-7 x 9 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 applications, reducing the risk of fastener failure.
• Superior corrosion resistance from zinc yellow-chromate plating extends service life in harsh industrial environments, minimizing maintenance needs.
• High hardness (Rockwell C33) provides excellent wear resistance, maintaining thread integrity during repeated assembly and disassembly.
• Coarse UNC threads offer faster installation and better grip in soft materials, improving assembly efficiency.
• Class 2A thread fit ensures consistent, easy engagement with nuts and tapped holes, reducing installation time and errors.
• Partially threaded design allows for precise clamping force control, ideal for applications requiring specific grip lengths.
• External hex drive enables high-torque tightening with standard tools, facilitating secure connections in heavy machinery.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to address critical challenges in heavy-duty sectors like construction, machinery assembly, and industrial equipment. The steel material combined with zinc yellow-chromate plating delivers robust corrosion protection, essential for outdoor or humid environments where rust can compromise structural integrity. With a 1 1/4"-7 UNC coarse thread and partial threading, it provides optimal load distribution and vibration resistance, preventing loosening in dynamic applications. Its 150,000 psi tensile strength and Rockwell C33 hardness ensure it withstands extreme forces, making it a reliable choice for bolting frameworks, securing heavy components, and other high-stress fastening tasks where durability and compliance with industry standards are paramount.

Specification Summary & Compliance

This fastener adheres to precise dimensional tolerances, including Class 2A thread fit and UNC coarse thread standards, ensuring compatibility with common industrial components. It meets ASME B18.2.1 and SAE J429 specifications for consistent quality and performance. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental responsibility for global supply chains.