S-90652A055 5/8"-11 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance with nylon insert locking mechanism that maintains secure fastening in high-motion environments
• Enhanced durability and corrosion protection through zinc-plated steel construction for extended service life
• Easy installation and removal with external hex drive design that provides reliable tool engagement
• High-temperature performance with nylon insert rated for temperatures up to 250°F (121°C)
• Precision threading compatibility with Class 2B thread fit ensuring consistent engagement with mating components
• Space-saving design with extra-wide thin hex profile offering optimal clamping in confined areas
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for global industrial applications

Professional Applications & Engineering Value

This 5/8"-11 UNC nylon insert lock nut delivers critical vibration resistance in demanding industrial environments where loosening under dynamic loads poses significant safety risks. The zinc-plated steel construction provides essential corrosion protection while maintaining high tensile strength, making it ideal for outdoor equipment, machinery assemblies, and automotive applications. The extra-wide thin hex profile offers superior wrench grip and torque transmission while minimizing space requirements. With its coarse UNC threads and Class 2B thread fit, this locknut ensures rapid installation and reliable performance in high-vibration scenarios such as power transmission systems, conveyor equipment, and heavy machinery where fastener integrity is paramount. The nylon insert maintains consistent locking force through thermal cycles up to 250°F, providing long-term reliability in temperature-fluctuating environments.

Specification Summary & Compliance

This locknut features 5/8"-11 UNC coarse threads with Class 2B thread fit for precision engagement, right-hand thread direction, and external hex drive style. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental compliance for industrial distribution. The zinc-plated steel construction meets industry standards for corrosion resistance and mechanical performance in demanding applications.