S-92087A110 4-40 Locknuts
Locknuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Finish & Compliance Parameters
Washer Parameters
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Key Features & Benefits at a Glance
- Superior vibration resistance through integrated spring lock washer design that maintains clamping force under dynamic loads
- Enhanced corrosion protection with black-oxide steel construction for extended service life in industrial environments
- Reliable thread engagement with Class 2B thread fit ensuring consistent performance and easy assembly
- Quick installation and removal using standard wrench tools thanks to the external hex drive design
- Secure locking performance in coarse UNC 4-40 threading applications where vibration loosening is a concern
- Environmental compliance assurance meeting both REACH and RoHS 3 standards for industrial applications
- Optimized dimensional compatibility with 1/4" width and 9/64" height for standard industrial applications
Professional Applications & Engineering Value
This black-oxide steel locknut with integrated spring lock washer addresses critical vibration-induced loosening challenges in industrial machinery, automotive assemblies, and electrical enclosures. The 4-40 UNC coarse thread configuration provides excellent engagement in materials where fine threads might strip, while the external hex drive enables high torque application with common tools. The combination of steel construction and specialized lock washer creates a permanent vibration-resistant solution that outperforms standard nuts in high-cycle applications. Engineered for demanding industrial environments, this locking fastener maintains integrity through thermal cycling and mechanical stress, reducing maintenance frequency and preventing equipment downtime.
Specification Summary & Compliance
This heavy-duty locknut features Class 2B thread fit per UNC standards with right-hand coarse threading (4-40). Manufacturing complies with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental directives. Dimensional specifications include 1/4" width across flats and 9/64" height with spring lock washer outer diameter of 0.328". The black-oxide finish on steel substrate provides corrosion resistance while maintaining electrical conductivity where required.
