S-90949A124 7/8"-9 Flange Nuts

Key Features & Benefits at a Glance

• Superior vibration resistance through distorted thread locking technology that maintains clamp load in high-stress environments
• Enhanced corrosion protection with black-phosphate steel coating that withstands harsh industrial conditions
• Reduced installation time with integrated flange design that eliminates need for separate washers
• Reliable thread engagement with Class 2B thread fit ensuring consistent performance across applications
• Heavy-duty performance meeting Grade G strength requirements for demanding mechanical assemblies
• Wide bearing surface with 1-3/4" flange diameter that distributes load evenly and prevents surface damage
• Environmental compliance with RoHS 3 standards for use in regulated industries and global markets

Professional Applications & Engineering Value

This Grade G flange lock nut delivers exceptional engineering value through its distorted thread locking technology that actively resists loosening under extreme vibration and dynamic loads. The black-phosphate steel construction provides superior corrosion resistance in outdoor equipment, agricultural machinery, and construction applications where environmental exposure is a concern. The integrated 1-3/4" flange eliminates the need for separate washers while providing superior load distribution on softer materials. With 7/8"-9 UNC coarse threading, this nut ensures rapid installation and removal in maintenance-heavy operations, making it ideal for heavy equipment, transportation systems, and industrial machinery where reliability cannot be compromised.

Specification Summary & Compliance

This heavy-duty flange lock nut features 7/8"-9 UNC coarse threads with Class 2B thread fit for consistent engagement and right-hand threading direction. The nut meets Grade G strength requirements and complies with RoHS 3 (2015/863/EU) standards for environmental safety. Manufacturing specifications include a flange diameter of 1-3/4", external hex drive style, and distorted thread locking mechanism engineered to maintain performance in the most demanding industrial applications.