S-90949A213 1/4"-28 Flange Nuts

Key Features & Benefits at a Glance

• Superior vibration resistance through distorted thread locking technology that maintains secure fastening in high-stress environments
• Enhanced corrosion protection with zinc yellow-chromate plating that withstands harsh industrial conditions
• Maximum holding power from Grade G strength classification ensuring reliable performance in demanding applications
• Precise thread engagement with Class 2B thread fit providing consistent, reliable fastening alignment
• Integrated flange design eliminates need for separate washers while distributing load across wider surface area
• Fine thread configuration (UNF 1/4"-28) delivers superior clamping force and resistance to loosening
• Standard external hex drive enables easy installation with common tools while maintaining high torque capability

Professional Applications & Engineering Value

Engineered for demanding industrial environments where vibration-induced loosening compromises safety and performance, these Grade G flange lock nuts provide a reliable sealing solution through their distorted thread locking mechanism. The integrated 9/16" flange diameter distributes clamping pressure evenly across mating surfaces, preventing damage to soft materials while eliminating the need for additional washers. The zinc yellow-chromate plated steel construction offers exceptional corrosion resistance in automotive, machinery, and manufacturing applications where exposure to oils, chemicals, and environmental elements is common. The UNF fine thread configuration ensures precise engagement with mating components, maintaining consistent preload and preventing thread stripping under high vibration conditions.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2B thread fit for consistent engagement and UNF 1/4"-28 fine thread specification. The external hex drive (7/16" width) accommodates standard wrenching tools while the 19/64" height provides optimal thread engagement. Complies with industry standards for Grade G strength classification and features right-hand thread direction with distorted thread locking technology. The zinc yellow-chromate plating meets corrosion protection requirements for industrial applications.