S-92620A703 3/8"-24 x 1 3/8" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional strength and durability with Grade 8 classification and 150,000 psi tensile strength, ensuring reliable performance in high-stress applications.
• Superior corrosion resistance provided by the zinc yellow-chromate plating, extending the screw's service life in harsh industrial environments.
• Precise and secure fastening thanks to the 3/8"-24 UNF fine thread and Class 2A thread fit, which minimizes the risk of loosening under vibration.
• Easy installation and removal with the external hex head design, allowing for high torque application with standard tools.
• Full threading for maximum grip along the entire 1 3/8" length, providing consistent holding power across the fastened materials.
• High hardness rating of Rockwell C33, offering excellent wear resistance and reducing damage during installation.
• Compliance with industry standards including ASME B18.2.1 and SAE J429, ensuring consistent quality and interoperability in professional assemblies.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to address critical challenges in heavy-duty industrial settings, such as machinery assembly, automotive frameworks, and construction equipment. The steel material combined with a zinc yellow-chromate finish provides robust protection against rust and corrosion, significantly reducing maintenance needs in demanding environments. Its 3/8"-24 UNF fine threading and Class 2A thread fit ensure tight, vibration-resistant connections, preventing failures in dynamic applications. Fully threaded for uniform stress distribution, this external hex drive screw supports high torque requirements, making it ideal for applications where reliability and high tensile strength are paramount, such as in structural supports and heavy machinery fastening.

Specification Summary & Compliance

This screw adheres to precise dimensional tolerances with a Class 2A thread fit and UNF fine thread standard, ensuring consistent performance and easy assembly. It meets ASME B18.2.1 and SAE J429 specifications, confirming its reliability in industrial applications. Manufactured from high-strength steel with a zinc yellow-chromate plating, it complies with common industry requirements for durability and safety, though specific RoHS or REACH declarations should be verified per batch. The inch-based measurements and right-hand threading align with standard practices for seamless integration into existing systems.