S-92620A595 5/16"-18 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.
• Superior corrosion resistance from zinc yellow-chromate plating extends service life in harsh environments, minimizing maintenance and replacement costs.
• High hardness (Rockwell C33) provides excellent wear resistance and durability, ideal for repetitive assembly and disassembly.
• Fully threaded UNC coarse design allows for faster installation and secure gripping in a wide range of materials, improving assembly efficiency.
• Precise Class 2A thread fit ensures smooth engagement and consistent performance, reducing cross-threading and assembly errors.
• External hex drive and hex head offer easy installation with standard tools, speeding up workflow in time-sensitive projects.
• Compliance with ASME B18.2.1 and SAE J429 guarantees quality and interoperability, meeting rigorous industrial standards for safety and reliability.

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, construction, and automotive applications. The steel material combined with a zinc yellow-chromate finish provides robust protection against corrosion and oxidation, ensuring long-term performance in exposed or humid conditions. The UNC coarse thread and fully threaded design enhance grip and load distribution, reducing the likelihood of loosening under vibration or dynamic loads. By meeting ASME B18.2.1 and SAE J429 specifications, it delivers consistent dimensional accuracy and strength, making it a trusted choice for engineers and procurement specialists seeking reliable industrial fasteners that minimize downtime and maintenance costs.

Specification Summary & Compliance

This fastener adheres to precise Class 2A thread fit and UNC thread standards, ensuring compatibility and ease of use. It conforms to ASME B18.2.1 and SAE J429 manufacturing specifications, with a tensile strength of 150,000 PSI and Rockwell C33 hardness for high-performance requirements. The product is designed for use in inch-system applications and meets industry standards for quality and safety, supporting compliance in various industrial sectors.