S-90477A038 1"-8 Flange Nuts

Key Features & Benefits at a Glance

• Eliminates the need for separate washers with its integrated 2" flange, saving assembly time and reducing component count
• Provides superior resistance to loosening under vibration due to the rotating flange design that maintains consistent clamp load
• Offers excellent corrosion protection with the black-oxide steel finish, extending service life in demanding industrial environments
• Ensures reliable, high-strength fastening with a coarse UNC thread and Class 2B fit for easy assembly and robust performance
• Simplifies installation and removal with a standard external hex drive profile compatible with common tools
• Guarantees material and environmental compliance by meeting both REACH and RoHS 3 standards for safe industrial use
• Delivers consistent dimensional accuracy with a precise flange diameter and thickness for uniform load distribution

Professional Applications & Engineering Value

This heavy-duty flange nut is engineered to solve critical challenges in industrial assembly, where vibration resistance and long-term durability are paramount. The black-oxide steel construction provides a robust barrier against corrosion, making it ideal for outdoor equipment, machinery, and structural applications exposed to harsh conditions. The integrated rotating flange acts as a built-in washer, distributing clamp force over a wider area to prevent surface damage and maintain joint integrity. Its 1"-8 UNC coarse thread with a Class 2B fit ensures quick, reliable engagement, reducing installation time while providing a secure, high-strength connection that withstands dynamic loads and thermal cycling. This nut is a trusted solution for engineers seeking to enhance reliability and reduce maintenance in heavy machinery, automotive, and construction assemblies.

Specification Summary & Compliance

This flange nut adheres to standard UNC coarse threading (1"-8) with a Class 2B thread fit for consistent, reliable engagement. The manufacturing and material specifications ensure dimensional accuracy for the 2" flange diameter and 0.47" thickness. The product is fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) directives, confirming it is free of restricted hazardous substances and suitable for use in regulated industrial and international markets.