S-96278A511 1/4"-20 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through integrated external-tooth lock washer that maintains clamping force under dynamic loads
• Exceptional corrosion resistance with 18-8 stainless steel construction suitable for harsh industrial environments
• Reliable thread engagement with Class 2B thread fit ensuring consistent performance and easy assembly
• Enhanced locking security from 400 stainless steel washer that bites into mating surfaces for permanent fastening
• Industry-standard compatibility with UNC coarse thread (1/4"-20) and right-hand threading for broad application use
• Optimized torque transmission via 7/16" hex profile providing secure tool engagement and installation efficiency
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for environmental and safety requirements

Professional Applications & Engineering Value

This heavy-duty 1/4"-20 UNC locknut with integrated external-tooth lock washer addresses critical vibration-induced loosening challenges in industrial machinery, automotive assemblies, and structural frameworks. The 18-8 stainless steel construction provides excellent corrosion resistance while maintaining mechanical strength, making it ideal for applications exposed to moisture, chemicals, or outdoor elements. The external-tooth locking mechanism creates positive mechanical interference that prevents rotational movement, eliminating the need for secondary locking devices. With its Class 2B thread fit and coarse threading, this locknut ensures rapid installation and reliable performance in high-vibration environments where traditional fasteners would fail, reducing maintenance frequency and improving operational safety.

Specification Summary & Compliance

This locknut features precision UNC coarse threads (1/4"-20) with Class 2B thread fit tolerances for optimal engagement. The assembly combines an 18-8 stainless steel hex nut (7/16" width, 15/64" height) with a 400 stainless steel external-tooth lock washer (0.5" OD). Manufacturing complies with industry standards for right-hand threaded locknuts and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance requirements for industrial applications.