S-92620A582 5/16"-18 x 7/8" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional Load-Bearing Capacity: With a tensile strength of 150,000 psi, these screws provide reliable performance in high-stress applications, reducing the risk of fastener failure.
• Superior Corrosion Resistance: Zinc yellow-chromate plating offers enhanced protection against rust and environmental elements, extending the service life of your assemblies.
• High-Strength Material: Made from Grade 8 steel with Rockwell C33 hardness, ensuring durability and resistance to wear in demanding industrial settings.
• Easy Installation and Removal: External hex drive and coarse UNC threads allow for quick, secure fastening with standard tools, saving time during assembly and maintenance.
• Precision Thread Fit: Class 2A thread fit ensures consistent engagement and reduces the likelihood of cross-threading, improving overall assembly reliability.
• Full Threading for Maximum Grip: Fully threaded design provides uniform load distribution along the entire length, enhancing holding power in various materials.
• Compliance with Industry Standards: Meets ASME B18.2.1 and SAE J429 specifications, ensuring compatibility and reliability in regulated environments.

Professional Applications & Engineering Value

These Grade 8 hex head screws are engineered to address critical challenges in heavy-duty industrial applications, such as machinery assembly, construction, and automotive systems. The steel material and fully threaded UNC coarse thread design ensure robust performance under high vibration and load conditions, preventing loosening and maintaining structural integrity. The zinc yellow-chromate plating provides superior corrosion resistance, making them ideal for harsh environments where moisture and chemicals are present. By combining high tensile strength and precise Class 2A thread fit, these screws reduce installation errors and enhance long-term reliability, supporting efficient maintenance and reducing downtime in industrial applications.

Specification Summary & Compliance

This product features precise Class 2A thread fit with UNC coarse threads (5/16"-18) and dimensions including a 7/8" length, 1/2" head width, and 7/32" head height. It complies with ASME B18.2.1 and SAE J429 standards for quality and performance. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory adherence in global markets.