S-91268A797 9/16"-12 x 5" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional strength for demanding applications with Grade 8 classification and 150,000 psi tensile strength, ensuring reliable performance under high stress.
• Superior durability and wear resistance provided by Rockwell C33 hardness, extending the fastener's service life in harsh industrial environments.
• Optimized for secure fastening and easy installation featuring a 13/16" external hex head and coarse 9/16"-12 UNC thread for superior grip and reduced assembly time.
• Enhanced load distribution and joint integrity due to the partially threaded design, minimizing stress concentration on the shank.
• Precise and reliable thread engagement with Class 2A thread fit, ensuring consistent performance and reducing the risk of cross-threading.
• Broad compatibility and assured quality as it meets ASME B18.2.1 and SAE J429 standards, guaranteeing interchangeability and performance in various machinery and equipment.
• Safe for regulated industries with compliance to RoHS 3 and REACH, making it suitable for use in environmentally conscious and global supply chains.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to address critical challenges in heavy machinery, construction, and automotive assemblies where failure is not an option. Its high-strength steel construction and 150,000 psi tensile strength provide a robust solution for applications subjected to extreme vibrations and dynamic loads. The 9/16"-12 UNC coarse thread and partially threaded design enhance clamping force and resist loosening, while the external hex drive allows for efficient torque application with standard tools. Ideal for securing structural components, engine parts, and industrial equipment, this screw ensures long-term reliability and reduces maintenance downtime, making it a trusted choice for engineers and procurement specialists seeking durable industrial fasteners.

Specification Summary & Compliance

This 5" length hex head screw features precise Class 2A thread fit and UNC coarse threading with a minimum thread length of 1 3/8". It is manufactured in accordance with ASME B18.2.1 and SAE J429 specifications, ensuring dimensional accuracy and performance consistency. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, affirming its suitability for use in environmentally regulated and international markets.