S-98892A122 8-32 NAS1291C08M Flange Nuts

Key Features & Benefits at a Glance

• Superior vibration resistance through center lock distorted thread technology that maintains secure fastening in high-stress environments
• Enhanced durability and corrosion resistance with A286 stainless steel construction for extended service life in demanding applications
• Precise thread engagement with Class 3B thread fit ensuring reliable, consistent performance and reduced installation issues
• Integrated flange design provides wider bearing surface for improved load distribution and reduced surface damage
• Simplified installation with included lubricant that facilitates proper torque application and prevents galling
• Compliance with NAS1291C08M specifications guarantees aerospace-grade quality and performance standards
• External hex drive design enables easy installation and removal with standard tools while maintaining structural integrity

Professional Applications & Engineering Value

This 8-32 UNC center lock flange nut addresses critical vibration-induced loosening challenges in industrial and aerospace applications. The distorted thread technology creates consistent interference along the thread path, providing permanent locking action without requiring additional locking elements. Manufactured from A286 stainless steel, this fastener maintains strength at elevated temperatures while offering excellent corrosion resistance. The combination of Class 3B thread fit and UNC coarse threading ensures rapid assembly with minimal cross-threading risk, while the integrated flange design distributes clamping force over a larger area, protecting sensitive surfaces. These engineering features make it ideal for critical assemblies in aerospace, heavy machinery, and transportation equipment where vibration resistance and reliability are paramount.

Specification Summary & Compliance

This flange nut meets precise dimensional requirements with 8-32 UNC coarse threads and Class 3B thread fit for superior engagement. The fastener complies with NAS1291C08M specifications for aerospace applications and features a center lock distorted thread design. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, ensuring safe use in regulated industries. Critical dimensions include 7/32" width across flats, 3/16" height, 0.29" flange diameter, and 0.02" flange thickness for consistent performance across applications.