S-90949A221 5/8"-11 Flange Nuts

Key Features & Benefits at a Glance

• Superior vibration resistance through precision distorted thread locking technology that maintains clamp force in high-stress applications
• Enhanced corrosion protection with zinc yellow-chromate plating that withstands harsh industrial environments
• Heavy-duty performance meeting Grade G strength classification for demanding assembly requirements
• Integrated flange design with 1-21/64" diameter distributes load evenly and eliminates need for separate washers
• Reliable coarse threading with 5/8"-11 UNC specification provides quick installation and reduced cross-threading risk
• Precision thread fit meeting Class 2B standards ensures consistent engagement and optimal performance
• Standard external hex drive allows for conventional tooling and straightforward installation procedures

Professional Applications & Engineering Value

This Grade G flange lock nut delivers critical engineering solutions for industrial applications where vibration-induced loosening compromises assembly integrity. The distorted thread locking technology creates consistent interference fit along the 5/8"-11 UNC coarse thread, providing permanent vibration resistance without requiring additional locking elements. The zinc yellow-chromate plated steel construction offers superior corrosion resistance in demanding environments including outdoor equipment, heavy machinery, and transportation applications. The integrated 1-21/64" flange distributes clamping force over a wider surface area, reducing stress concentration and preventing surface damage to assembled components. This combination of locking performance and corrosion protection makes it ideal for permanent installations where maintenance access is limited and reliability is paramount.

Specification Summary & Compliance

This heavy-duty flange lock nut features 5/8"-11 UNC coarse threads with Class 2B thread fit precision, ensuring consistent engagement and reliable performance. The nut meets industry standards for Grade G strength classification and incorporates distorted thread locking technology for vibration resistance. Manufactured from zinc yellow-chromate plated steel for corrosion protection, the nut features a 1-21/64" flange diameter and standard external hex drive for conventional installation. The product complies with relevant industrial specifications for mechanical properties and dimensional accuracy.