S-90621A070 1 3/4"-5 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through steel insert locking mechanism that maintains secure fastening under extreme conditions
• Exceptional strength and durability with Grade 8 steel construction for heavy-duty industrial applications
• Enhanced torque application with extra wide 2 3/4" hex profile for better grip and easier installation
• Reliable thread engagement with Class 2B thread fit ensuring consistent performance and reduced cross-threading risk
• Optimized for demanding environments featuring coarse UNC threads that resist loosening under vibration and shock loads
• Environmental compliance assurance with RoHS 3 compliance for safe use in regulated industries
• Right-hand thread design for standard installation procedures and compatibility with existing equipment

Professional Applications & Engineering Value

This Grade 8 steel locknut delivers critical vibration resistance in heavy machinery, construction equipment, and industrial assemblies where constant motion and shock loads threaten fastener integrity. The steel insert locking mechanism creates permanent friction against mating threads, eliminating the need for secondary locking devices and reducing maintenance frequency. The extra wide hex profile (2 3/4") provides superior wrench engagement, allowing higher torque application without tool slippage in confined spaces. Engineered with coarse UNC threads and Class 2B thread fit, this locknut maintains secure fastening in high-vibration environments while resisting corrosion and wear. Ideal for mining equipment, agricultural machinery, and structural applications where reliability cannot be compromised.

Specification Summary & Compliance

This heavy-duty locknut features 1 3/4"-5 UNC coarse threads with Class 2B thread fit precision manufacturing for consistent performance. Manufactured from high-strength Grade 8 steel with external hex drive and right-hand thread direction. The nut measures 2 3/4" in width and 2 1/32" in height, designed with an extra wide hex profile for enhanced torque capability. Compliant with RoHS 3 (2015/863/EU) environmental standards, ensuring safe use across industrial sectors while meeting rigorous quality and performance requirements for demanding applications.