S-91015A030 5/16"-18 Hex Nuts

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with black-oxide steel coating, ideal for harsh industrial environments
• Superior torque transmission due to the extra-wide thin profile and external hex drive, reducing slippage during installation
• Reliable coarse thread engagement with UNC 5/16"-18 and Class 2B fit, ensuring quick assembly and vibration resistance
• Space-saving design with a height of 13/64", perfect for applications with limited clearance
• Broad compatibility with inch-system components and right-hand threading for standard machinery
• Long-term durability from robust steel construction, minimizing replacement needs in heavy-duty use
• Environmental compliance meeting RoHS 3 and REACH standards, safe for regulated industries

Professional Applications & Engineering Value

This 5/16"-18 UNC hex nut in black-oxide steel addresses common industrial challenges like corrosion and assembly efficiency. The extra-wide thin profile provides a larger wrenching surface, enhancing grip and reducing the risk of tool slip in high-torque scenarios, while the coarse thread facilitates faster installation in machinery, automotive, and construction applications. Its Class 2B thread fit ensures consistent performance with standard bolts, minimizing loosening under vibration. By combining a corrosion-resistant finish with a compact height, it offers reliable fastening in confined spaces and aggressive environments, boosting operational longevity and reducing maintenance downtime for B2B clients.

Specification Summary & Compliance

This hex nut adheres to UNC coarse thread standards with a Class 2B thread fit for precise dimensional accuracy, measuring 9/16" in width and 13/64" in height. Manufactured from steel with a black-oxide finish, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for industrial fastener applications.