S-91268A925 1"-8 x 3" 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.
• Grade 8 steel construction with Rockwell C33 hardness provides superior durability and resistance to wear, extending service life in demanding environments.
• Fully threaded UNC coarse thread design allows for faster installation and improved grip in a wide range of materials, enhancing assembly efficiency.
• Class 2A thread fit ensures consistent, precise engagement with nuts and tapped holes, minimizing loosening and vibration issues.
• External hex drive and hex head offer easy torque application with standard tools, facilitating quick and secure fastening in tight spaces.
• Compliance with ASME B18.2.1 and SAE J429 standards guarantees dimensional accuracy and interoperability, supporting quality assurance in professional projects.
• RoHS 3 and REACH compliance ensures environmental safety and regulatory adherence, making these screws suitable for global supply chains.

Professional Applications & Engineering Value

These Grade 8 hex head screws are engineered to address critical challenges in heavy-duty industrial settings, such as machinery assembly, construction, and automotive applications. The steel material and Rockwell C33 hardness provide excellent resistance to shear and tensile forces, preventing deformation under extreme loads. With a 1"-8 UNC coarse thread and fully threaded design, they ensure rapid installation and strong holding power in coarse-grained materials, reducing assembly time and maintenance needs. The external hex drive allows for high-torque application, making them ideal for environments where vibration resistance and reliability are paramount. By meeting ASME B18.2.1 and other standards, these screws deliver consistent performance, minimizing downtime and enhancing operational safety in sectors like manufacturing and infrastructure.

Specification Summary & Compliance

This hex head screw features precise dimensions, including a 1"-8 UNC thread with Class 2A fit for accurate thread engagement and tolerance. It adheres to ASME B18.2.1 and SAE J429 specifications, ensuring compatibility and reliability. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible and safe usage in various industrial applications.