S-92620A141 5/16"-18 x 1 1/8" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional strength for heavy-duty applications with a tensile strength of 150,000 psi, ensuring reliable performance under high stress.
• Superior corrosion resistance provided by the zinc yellow-chromate plating, extending service life in harsh industrial environments.
• High hardness rating of Rockwell C33 for excellent wear resistance and durability, reducing the need for frequent replacements.
• Precise UNC coarse threading with Class 2A fit ensures easy installation and secure fastening, minimizing assembly time and errors.
• Fully threaded design offers maximum grip and holding power along the entire length, ideal for demanding mechanical assemblies.
• Compliance with ASME B18.2.1 and SAE J429 standards guarantees consistent quality and interchangeability in professional settings.
• Environmentally compliant with RoHS 3 and REACH regulations, making it safe for use in regulated industries without harmful substances.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to address critical challenges in industrial and mechanical applications where failure is not an option. Made from high-strength steel and finished with a zinc yellow-chromate plating, it provides robust protection against corrosion, making it ideal for outdoor machinery, automotive assemblies, and construction equipment exposed to moisture and chemicals. The UNC coarse thread and Class 2A fit ensure quick, reliable fastening in materials like metal and thick plastics, reducing vibration loosening and maintenance downtime. With its fully threaded design and external hex drive, it delivers uniform clamping force and easy installation with standard tools, enhancing efficiency in production lines and repair operations. This screw is a trusted solution for engineers seeking durability, compliance, and performance in heavy-duty fastening scenarios.

Specification Summary & Compliance

This fastener features precise dimensions including a 5/16"-18 UNC thread size with coarse spacing and Class 2A thread fit for accurate assembly. It adheres to ASME B18.2.1 and SAE J429 specifications, ensuring reliable performance in mechanical systems. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental responsibility for global industrial use.