S-99851A104 10-32 MS21046C3, NASM21046 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, preventing loosening in high-stress environments
- Enhanced corrosion protection with silver-plated 18-8 stainless steel construction for extended service life
- Precise thread engagement with Class 3B fit ensuring reliable performance in critical applications
- Industry-standard compliance meeting MS21046C3 and NASM21046 specifications for aerospace reliability
- Optimal torque transmission via standard external hex drive design for secure installation
- Environmental regulation compliance with RoHS 3 and REACH standards for global manufacturing use
- Fine thread precision with 10-32 UNF right-hand threads providing superior clamping force distribution
Professional Applications & Engineering Value
This silver-plated 18-8 stainless steel locknut delivers critical performance where vibration resistance and corrosion protection are paramount. The Flex-Top locking mechanism creates consistent friction along the thread engagement, effectively solving vibration-induced loosening in aerospace assemblies, precision machinery, and industrial equipment. The combination of Class 3B thread fit and UNF fine threading ensures maximum clamping force retention while the silver plating enhances electrical conductivity and provides additional barrier protection. Engineered to MS21046C3 and NASM21046 standards, this external hex locknut meets the rigorous demands of military and commercial aviation applications where failure is not an option.
Specification Summary & Compliance
This 10-32 UNF locknut features Class 3B thread fit for precision engagement with matching male threads. Manufactured to MS21046C3 and NASM21046 specifications with standard external hex drive (3/8" width) and 15/64" height profile. The right-hand fine thread configuration ensures optimal performance in high-vibration environments. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for restricted substances.
