S-92018A210 1/4"-20 Flange Nuts

Key Features & Benefits at a Glance

• Superior vibration resistance with nylon insert locking that maintains secure fastening in high-stress environments
• Enhanced corrosion protection through zinc yellow-chromate plating for extended service life in harsh conditions
• High-temperature durability with nylon insert rated up to 250°F for reliable performance in thermal cycling applications
• Integrated flange design eliminates need for separate washers, providing larger bearing surface and simplified installation
• Precision UNC coarse threading with Class 2B fit ensures smooth assembly and consistent engagement
• Grade G strength classification delivers reliable mechanical performance for industrial applications
• Standard external hex drive enables easy installation with common tools while maintaining secure torque application

Professional Applications & Engineering Value

This Grade G nylon insert flange lock nut provides critical vibration-resistant fastening solutions for industrial equipment, automotive assemblies, and machinery where loosening under dynamic loads is a primary concern. The combination of zinc yellow-chromate plated steel construction and nylon insert locking technology addresses two major engineering challenges: corrosion-induced failure and vibration-induced loosening. The integrated flange design distributes clamping force over a wider area (0.56" diameter), reducing surface pressure and preventing damage to connected materials. With UNC coarse threads and Class 2B thread fit, this nut ensures rapid assembly while maintaining precise thread engagement, making it ideal for production environments where both speed and reliability are essential. The 250°F-rated nylon insert maintains its locking properties across typical industrial temperature ranges, providing consistent performance in applications from outdoor equipment to engine compartments.

Specification Summary & Compliance

This flange lock nut features 1/4"-20 UNC coarse threads with Class 2B thread fit for standard industrial applications. The external hex drive (7/16" width) accommodates common wrenching tools, while the 19/64" height provides optimal thread engagement. Manufactured to Grade G strength classification standards, this nut meets industry requirements for mechanical performance. The zinc yellow-chromate plating provides corrosion resistance in accordance with standard industrial plating specifications, while the nylon insert meets temperature performance requirements up to 250°F. The product complies with relevant industrial standards for UNC thread forms and locking nut performance characteristics.