S-90621A033 1/2"-13 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through steel insert locking technology that maintains clamp force in high-stress environments
• Enhanced torque application with extra wide hex profile providing better grip and reduced tool slippage
• Reliable thread engagement with Class 2B thread fit ensuring consistent performance across multiple installations
• Heavy-duty construction using Grade 5 steel for excellent tensile strength and durability in industrial applications
• Simplified installation with standard UNC coarse threads and right-hand direction for compatibility with common fastening systems
• Environmental compliance meeting RoHS 3 standards for use in regulated industries and international markets
• Optimized dimensions (7/8" width × 9/16" height) providing substantial bearing surface while maintaining compact profile

Professional Applications & Engineering Value

This Grade 5 steel locknut with steel insert locking technology addresses critical vibration-induced loosening in heavy machinery, construction equipment, and automotive assemblies. The extra wide hex profile enables higher torque application without damaging the fastener, while the UNC coarse threads provide rapid installation in challenging field conditions. Engineered for permanent fastening solutions, this industrial locknut maintains clamping force in high-vibration environments where standard nuts would fail, reducing maintenance downtime and preventing equipment damage. The combination of Class 2B thread fit and robust steel construction ensures reliable performance in critical applications from structural steel connections to power transmission systems.

Specification Summary & Compliance

This locknut features 1/2"-13 UNC coarse threads with Class 2B thread fit for precise engagement and consistent performance. Manufactured to Grade 5 strength classification with dimensions of 7/8" width and 9/16" height. The product is RoHS 3 (2015/863/EU) compliant and utilizes external hex drive with right-hand thread direction for standardized installation procedures across industrial applications.