S-99638A100 10-32 MS21045-3 Locknuts
Locknuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior vibration resistance through flex-top locking technology that maintains secure fastening under dynamic loads
- Enhanced corrosion protection with cadmium yellow-chromate plating for extended service life in harsh environments
- Precise thread engagement with Class 3B fit ensuring reliable performance in critical applications
- Easy installation and removal with standard external hex drive compatible with common tools
- Military specification compliance meeting MS21045-3 standards for quality assurance
- Optimal size compatibility with 10-32 UNF fine threads and 3/8" width for versatile applications
- Durable steel construction providing high strength-to-weight ratio for demanding industrial use
Professional Applications & Engineering Value
This 10-32 UNF locknut delivers exceptional engineering value through its specialized flex-top locking mechanism that actively counters vibration-induced loosening in critical assemblies. The cadmium yellow-chromate plated steel construction provides dual-layer protection against corrosion while maintaining electrical conductivity, making these locknuts ideal for aerospace applications, industrial machinery, and electronic enclosures where vibration resistance and environmental durability are paramount. The Class 3B thread fit ensures precise engagement with mating components, reducing the risk of cross-threading and providing consistent clamping force in high-stress environments. These features combine to create a reliable fastening solution that minimizes maintenance requirements and extends service intervals in demanding operational conditions.
Specification Summary & Compliance
This locknut features 10-32 UNF fine threads with Class 3B thread fit for precision engagement, right-hand thread direction, and complies with MS21045-3 military specifications. The external hex drive measures 3/8" across flats with a 1/4" height profile. Manufactured from cadmium yellow-chromate plated steel, these locknuts meet relevant industry standards for quality and performance in critical applications.
