S-98514A150 5/8"-18 Hex Nuts

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with Black-Oxide 18-8 Stainless Steel construction, ideal for humid or chemically aggressive environments.
• Space-saving design due to the thin profile, allowing use in compact assemblies without compromising strength.
• Superior thread engagement and vibration resistance from the Class 2B fine UNF thread, ensuring reliable, long-term fastening.
• Easy installation and removal with the external hex drive, compatible with standard wrenches for efficient maintenance.
• Environmental and regulatory compliance meeting RoHS 3 and REACH standards, safe for various industrial applications.
• Precise dimensional accuracy with consistent 15/16" width and 3/8" height, enabling seamless integration into existing designs.
• Durable performance in high-stress conditions thanks to the right-hand thread and robust stainless steel material.

Professional Applications & Engineering Value

This 5/8"-18 UNF thin hex nut is engineered to address common industrial challenges such as corrosion-induced failure and space constraints in machinery assemblies. The Black-Oxide 18-8 Stainless Steel provides a protective layer that significantly extends service life in demanding environments like automotive, marine, or outdoor equipment. Its fine thread spacing and Class 2B thread fit offer excellent clamp load retention, reducing the risk of loosening under vibration—a critical advantage in dynamic applications. The external hex drive ensures quick, tool-friendly installation, streamlining maintenance workflows while the thin profile maximizes design flexibility without sacrificing strength, making it a reliable choice for precision engineering projects.

Specification Summary & Compliance

This hex nut adheres to UNF fine thread standards with a Class 2B thread fit for consistent dimensional accuracy and reliable performance. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are met. Manufactured to precise specifications, including a width of 15/16" and height of 3/8", it supports quality assurance in industrial fastening applications.