S-90949A037 1/2"-20 Flange Nuts

Key Features & Benefits at a Glance

• Superior vibration resistance through distorted thread locking technology that maintains clamp force in high-stress environments
• Enhanced corrosion protection with black-phosphate steel coating that withstands harsh industrial conditions
• Increased bearing surface area from the 1-1/16" flange diameter distributes load more effectively than standard nuts
• Precise thread engagement with Class 2B fit and UNF fine threads ensures reliable performance in critical applications
• High-strength construction meeting Grade G specifications provides dependable performance under heavy loads
• Easy installation and removal with standard 3/4" external hex drive compatible with common tools
• Environmental compliance with RoHS 3 standards for use in regulated industries

Professional Applications & Engineering Value

This Grade G flange lock nut with distorted thread locking technology addresses critical vibration-induced loosening in demanding industrial applications. The black-phosphate steel construction provides excellent corrosion resistance while maintaining the high-strength requirements of Grade G classification. The integrated 1-1/16" flange eliminates the need for separate washers, reducing assembly time and providing superior load distribution. The UNF fine threads with Class 2B fit ensure precise engagement with mating components, making this flange lock nut ideal for automotive, machinery, and heavy equipment applications where vibration resistance and reliability are paramount. The combination of distorted thread locking and external hex drive delivers both security and serviceability in maintenance-critical environments.

Specification Summary & Compliance

This flange lock nut features 1/2"-20 UNF fine threads with Class 2B thread fit per standard inch system specifications. The nut meets Grade G strength classification requirements and is manufactured from black-phosphate steel for enhanced durability. The product is fully RoHS 3 (2015/863/EU) compliant and designed with a 3/4" external hex drive and 1-1/16" flange diameter for optimal performance in industrial fastening applications.