S-98892A123 5/16"-24 NAS1291C5M Flange Nuts
Flange Nuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Flange Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior vibration resistance with distorted thread center lock technology, ensuring reliable performance in high-stress environments
- Enhanced durability and corrosion resistance from premium A286 stainless steel, ideal for demanding industrial and aerospace applications
- Precise Class 3B thread fit for tight tolerances and secure fastening, reducing the risk of loosening under dynamic loads
- Easy installation and reduced wear thanks to included lubricant, saving time and maintenance costs
- Flange design eliminates the need for separate washers, providing a larger bearing surface and simplifying assembly
- Compliance with NAS1291C5M, RoHS 3, and REACH standards, ensuring reliability and environmental safety in regulated industries
- Fine 24 UNF threads offer improved load distribution and resistance to vibration-induced failure
Professional Applications & Engineering Value
This A286 stainless steel flange lock nut is engineered to address critical challenges in aerospace, automotive, and heavy machinery applications where vibration and thermal cycling can compromise fastener integrity. The distorted thread center lock design actively resists loosening by creating consistent interference, eliminating the need for secondary locking devices and reducing assembly complexity. Made from A286 stainless steel, it maintains strength and corrosion resistance at elevated temperatures, making it suitable for engines, structural assemblies, and high-performance equipment. The external hex drive and included lubricant facilitate quick installation, while the UNF fine thread and Class 3B fit ensure precise engagement, minimizing downtime and enhancing safety in critical systems.
Specification Summary & Compliance
This flange lock nut features a 5/16"-24 UNF fine thread with Class 3B thread fit for high precision and secure fastening. It complies with NAS1291C5M specifications, ensuring adherence to rigorous aerospace standards. The nut is manufactured with a 0.52" flange diameter and external hex drive for easy installation. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental responsibility. Includes lubricant for reduced friction during assembly.
