S-90621A035 5/8"-11 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through the steel insert locking mechanism, preventing loosening in high-stress environments
• Enhanced torque application with the extra wide hex profile, allowing for secure tightening with standard tools
• High strength durability from Grade 5 steel construction, supporting heavy-duty mechanical applications
• Reliable thread engagement with Class 2B thread fit, ensuring precise and consistent fastening
• Broad compatibility with 5/8"-11 UNC coarse threads, fitting common industrial components
• Environmental compliance meeting RoHS 3 standards, safe for regulated industries
• Easy installation via external hex drive, facilitating quick assembly and maintenance

Professional Applications & Engineering Value

This Grade 5 steel locknut is engineered to address critical challenges in industrial settings where vibration and dynamic loads threaten fastener integrity. The steel insert locking type actively counters loosening by maintaining constant friction, ideal for machinery, automotive, and construction equipment. Its extra wide hex profile distributes torque evenly, reducing the risk of stripping during high-torque applications. With UNC coarse threads and Class 2B thread fit, it ensures quick assembly and reliable performance in coarse-threaded systems, minimizing downtime. The right-hand thread direction and external hex drive simplify installation, making it a go-to solution for maintenance and production lines requiring robust, vibration-resistant fasteners.

Specification Summary & Compliance

This locknut adheres to UNC thread standards with a 5/8"-11 coarse thread size and Class 2B thread fit for precise tolerance. Dimensions include a width of 1 1/16" and height of 45/64". It is manufactured from Grade 5 steel for high strength and is RoHS 3 (2015/863/EU) compliant, ensuring environmental safety. The design meets common industrial specifications for reliability in mechanical fastening applications.