S-97149A136 6-40 Hex Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide coated 18-8 Stainless Steel, ideal for harsh environments and reducing replacement frequency.
• Precise thread engagement due to Class 2B fit, ensuring reliable, vibration-resistant connections in fine-thread applications.
• Enhanced durability from the UNF fine thread design, providing higher tensile strength and better load distribution.
• Wide compatibility with standard 5/16" hex profile, allowing use with common tools for efficient installation and maintenance.
• Environmental compliance meeting RoHS 3 and REACH standards, ensuring safe use in regulated industrial sectors.
• Right-hand thread direction for straightforward, intuitive assembly in standard fastening systems.
• Compact 7/64" height enabling use in space-constrained applications without compromising strength.

Professional Applications & Engineering Value

This 6-40 UNF fine thread hex nut is engineered to address critical challenges in precision assembly and corrosive settings. The Black-Oxide 18-8 Stainless Steel construction provides exceptional resistance to oxidation and chemical exposure, extending service life in industries like automotive, electronics, and marine equipment. Its fine thread and Class 2B fit deliver superior clamping force and minimize loosening under vibration, making it ideal for machinery, control panels, and high-stress fixtures. By combining inch-system standardization with robust material properties, it ensures reliable performance in demanding industrial fastening applications, reducing downtime and maintenance costs.

Specification Summary & Compliance

This hex nut adheres to UNF thread standards with a Class 2B thread fit for consistent dimensional accuracy. Key specifications include a 6-40 thread size, 5/16" width, and 7/64" height. It is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for global industrial use.