S-90621A045 5/8"-11 Locknuts

Key Features & Benefits at a Glance

• Exceptional vibration resistance through the steel insert locking mechanism, preventing loosening in high-stress environments
• Superior clamping force and load distribution due to the extra wide hex profile, reducing the risk of joint failure
• High-strength durability with Grade 8 steel construction, suitable for heavy-duty industrial applications
• Reliable and precise fit with Class 2B thread tolerance, ensuring smooth assembly and consistent performance
• Easy installation and removal using standard external hex drive tools, saving time and labor costs
• Environmental compliance with RoHS 3 standards, meeting global regulatory requirements for hazardous substances
• Optimized for coarse thread applications with 5/8"-11 UNC threads, providing strong holding power in dynamic conditions

Professional Applications & Engineering Value

This Grade 8 steel locknut is engineered to address critical challenges in heavy-duty industrial settings, where vibration and dynamic loads can compromise fastener integrity. The steel insert locking mechanism creates consistent friction to resist loosening, making it ideal for machinery, automotive, and construction applications. Its extra wide hex profile enhances grip and torque application, distributing clamping force evenly to prevent surface damage and maintain joint security. With coarse UNC threads and Class 2B thread fit, it ensures quick, reliable assembly in high-vibration environments, reducing maintenance needs and downtime. The external hex drive design allows for efficient installation with common tools, streamlining workflow in industrial assembly lines.

Specification Summary & Compliance

This locknut features a 5/8"-11 UNC coarse thread with Class 2B thread fit for precise dimensional accuracy, adhering to standard inch system measurements. It complies with RoHS 3 (2015/863/EU) regulations, ensuring it is free from hazardous substances. Manufactured from Grade 8 steel, it meets high-strength requirements for demanding applications, with dimensions of 1 1/16" width and 47/64" height for consistent performance.