S-97149A310 5/8"-18 Hex Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance from Black-Oxide 18-8 Stainless Steel, ideal for humid or chemically aggressive environments, reducing maintenance and replacement costs.
• Precise Class 2B thread fit ensures smooth, reliable engagement with mating bolts, minimizing the risk of cross-threading and assembly errors.
• Fine UNF thread spacing (5/8"-18) provides enhanced vibration resistance and superior clamping force retention in dynamic or high-stress applications.
• Standard external hex drive design allows for high-torque installation with common wrenches, speeding up assembly and disassembly processes.
• Right-hand threading conforms to industry-standard rotation for straightforward, intuitive installation in automated or manual settings.
• RoHS 3 and REACH compliance guarantees the nut is free from hazardous substances, meeting strict international environmental and safety regulations for global supply chains.
• Durable standard profile with dimensions of 15/16" width and 35/64" height offers consistent performance and interchangeability in existing assemblies.

Professional Applications & Engineering Value

This 5/8"-18 UNF Class 2B hex nut is engineered to address common industrial challenges such as fastener failure due to corrosion and vibration loosening. Constructed from Black-Oxide 18-8 Stainless Steel, it provides exceptional resistance to rust and oxidation, making it suitable for demanding environments like marine equipment, automotive assemblies, and outdoor machinery. The fine thread spacing and Class 2B thread fit ensure a secure, tight connection that maintains integrity under cyclic loads, reducing downtime and maintenance. With an external hex drive and right-hand thread, it facilitates quick installation in tight spaces, enhancing efficiency in production lines and repair operations. Ideal for applications requiring reliable, long-term fastening with minimal environmental impact.

Specification Summary & Compliance

This hex nut adheres to UNF thread standards with a Class 2B thread fit for consistent dimensional accuracy and compatibility. Manufactured from 18-8 Stainless Steel with a Black-Oxide finish, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from restricted substances. The nut features a standard profile with precise dimensions: 15/16" width and 35/64" height, supporting reliable performance in industrial fastening applications.