S-91831A122 6-40 Locknuts
Locknuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Temperature & Environment Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Vibration-resistant locking with a durable nylon insert that maintains secure fastening in high-stress environments
- Superior corrosion resistance provided by 18-8 stainless steel, ensuring longevity in harsh or outdoor applications
- Reliable performance at elevated temperatures, with the nylon insert rated for continuous use up to 220°F
- Precise Class 2B thread fit for smooth assembly and consistent engagement with mating components
- Fine UNF thread design offering improved load distribution and reduced risk of loosening under dynamic loads
- Standard external hex drive for easy installation and removal using common wrench tools
- Compliance with RoHS 3 and REACH standards, ensuring environmental safety and global regulatory acceptance
Professional Applications & Engineering Value
This 6-40 UNF nylon insert locknut delivers critical vibration resistance in demanding industrial settings where machinery and equipment are subject to constant motion or shock loads. The 18-8 stainless steel construction provides inherent corrosion resistance, making it ideal for applications in chemical processing, marine environments, or outdoor installations. The nylon insert creates consistent friction against the bolt threads, eliminating the need for secondary locking mechanisms and reducing maintenance downtime. With its fine UNF thread and Class 2B fit, this locknut ensures precise alignment and reliable performance in automotive assemblies, electronic enclosures, and precision manufacturing equipment where thread integrity is paramount.
Specification Summary & Compliance
This locknut features a 6-40 UNF fine thread with Class 2B thread fit tolerances, providing consistent engagement and reliable performance. The external hex drive measures 5/16" across flats with a height of 11/64", manufactured to standard industrial dimensions. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards for industrial components.
