S-97135A250 1/2"-13 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through nylon insert locking technology that maintains secure fastening under dynamic loads
• Exceptional durability with Grade 8 strength classification, providing high tensile strength for demanding industrial applications
• Corrosion protection from zinc yellow-chromate plating that extends service life in harsh environments
• Reliable high-temperature performance with nylon insert rated for continuous operation up to 220°F
• Precise thread engagement with Class 2B thread fit ensuring consistent, reliable installation
• Easy installation and removal with standard external hex drive design compatible with common tools
• Optimized for heavy-duty applications with coarse UNC threads that resist loosening under vibration and shock loads

Professional Applications & Engineering Value

This Grade 8 nylon insert lock nut delivers critical vibration resistance for machinery, equipment, and structural applications where secure fastening is paramount. The zinc yellow-chromate plated steel construction provides excellent corrosion protection while maintaining the high strength requirements of Grade 8 specifications. The nylon insert locking mechanism creates consistent friction against the mating bolt threads, effectively preventing loosening from vibration, thermal cycling, and dynamic loads. With its 1/2"-13 UNC coarse thread configuration and external hex drive, this locknut offers reliable performance in automotive, construction, manufacturing, and heavy equipment applications where safety and reliability cannot be compromised. The combination of high-temperature resistance (up to 220°F) and Class 2B thread fit ensures consistent performance across diverse operating conditions.

Specification Summary & Compliance

This locknut features 1/2"-13 UNC coarse threads with Class 2B thread fit for precise engagement and consistent torque performance. Manufactured to Grade 8 strength standards with standard hex profile (3/4" width) and right-hand thread direction. The zinc yellow-chromate plating provides corrosion resistance while meeting industry standards for heavy-duty fasteners. Complies with relevant industrial specifications for locknut performance and material requirements.