S-90949A219 1/2"-20 Flange Nuts

Key Features & Benefits at a Glance

• Superior vibration resistance through distorted thread locking technology that maintains secure fastening under dynamic loads
• Enhanced corrosion protection with zinc yellow-chromate plating that extends service life in harsh industrial environments
• Increased bearing surface area from the 1 1/16" flange diameter that distributes clamping force and prevents surface damage
• High-strength performance meeting Grade G specifications for demanding applications requiring reliable load-bearing capacity
• Precision fine threading with UNF 1/2"-20 Class 2B threads ensuring smooth engagement and consistent torque values
• Easy installation and removal using standard external hex drive compatible with common wrenching tools
• Reliable right-hand threading following industry standards for straightforward assembly in conventional applications

Professional Applications & Engineering Value

This Grade G flange lock nut delivers exceptional engineering value through its distorted thread locking mechanism that effectively counters vibration-induced loosening in heavy machinery, automotive assemblies, and industrial equipment. The zinc yellow-chromate plated steel construction provides superior corrosion resistance while maintaining the mechanical strength required for high-stress applications. The integrated 1 1/16" flange eliminates the need for separate washers, reducing assembly time and component count while providing enhanced load distribution. The UNF fine thread configuration ensures precise adjustment and secure fastening in applications where vibration resistance and reliability are critical. Engineered for external hex drive compatibility, this nut facilitates efficient installation and maintenance across various industrial sectors including manufacturing, transportation, and heavy equipment operations.

Specification Summary & Compliance

This flange lock nut features Class 2B thread fit tolerance for consistent engagement and reliable performance. Manufactured to UNF 1/2"-20 fine thread specifications with right-hand threading direction. The product meets Grade G strength classification requirements and features a standard hex profile with external drive style. Compliant with industry standards for inch system fasteners and suitable for applications requiring RoHS and REACH compliance in material composition. The zinc yellow-chromate plating provides corrosion protection while maintaining dimensional stability across the 3/4" width and 9/16" height specifications.