S-90619A213 1 1/4"-7 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through precision steel insert locking technology that maintains clamp force in high-stress environments
• Exceptional strength and durability with Grade 8 steel construction capable of withstanding heavy-duty industrial applications
• Space-saving thin profile design (7/8" height) ideal for applications with limited clearance while maintaining full locking performance
• Reliable coarse threading with 1 1/4"-7 UNC Class 2B fit ensures easy installation and consistent engagement in demanding conditions
• Optimized external hex drive provides secure tool engagement and torque application during installation and maintenance
• Environmental compliance assurance with RoHS 3 (2015/863/EU) compliance for use in regulated industrial environments
• Right-hand threading compatibility with standard UNC fastening systems for seamless integration into existing assemblies

Professional Applications & Engineering Value

This Grade 8 steel thin locknut delivers critical vibration resistance in heavy machinery, construction equipment, and industrial assemblies where constant motion and stress would typically cause standard nuts to loosen. The steel insert locking mechanism creates consistent friction along the UNC coarse threads, eliminating the need for secondary locking devices and reducing assembly time. The thin profile design (1 7/8" width × 7/8" height) solves space constraints in compact assemblies while maintaining the full strength characteristics of Grade 8 material. Engineered for external hex drive compatibility, this locknut ensures reliable torque application in maintenance-intensive environments where repeated servicing is required, making it ideal for mining equipment, agricultural machinery, and transportation applications where vibration-induced failure is not an option.

Specification Summary & Compliance

This locknut features 1 1/4"-7 UNC coarse threading with Class 2B thread fit per ASME B1.1 standards, ensuring proper engagement and dimensional accuracy. Manufactured from Grade 8 steel for high-strength performance, the nut incorporates a steel insert locking system that maintains clamping force under extreme vibration. The product is fully RoHS 3 (2015/863/EU) compliant and meets industrial standards for heavy-duty fastening applications requiring reliable, vibration-resistant solutions.