S-90477A031 3/8"-16 Flange Nuts

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with black-oxide steel construction for extended service life in harsh environments
• Superior load distribution through the 7/8" flange diameter, reducing surface pressure and preventing material damage
• Reliable coarse thread engagement with UNC 3/8"-16 specification for quick assembly and vibration resistance
• Precision thread fit meeting Class 2B standards ensuring consistent torque performance and secure fastening
• 360° rotating capability allowing for easy alignment and installation in hard-to-reach applications
• Standard external hex drive compatible with common tools for straightforward installation and removal
• Environmental compliance with RoHS 3 regulations for safe use across industrial sectors

Professional Applications & Engineering Value

This black-oxide steel flange nut delivers exceptional engineering value in demanding industrial applications where corrosion resistance and reliable fastening are critical. The integrated 7/8" steel flange eliminates the need for separate washers while providing superior load distribution across connected surfaces. With its UNC coarse thread and Class 2B thread fit, this rotating flange nut ensures rapid installation and maintains secure connections even under vibration and dynamic loads. The external hex drive design offers compatibility with standard tools, making it ideal for assembly lines, machinery maintenance, automotive systems, and structural frameworks where efficiency and durability are paramount. The black-oxide surface treatment provides an additional layer of protection against rust and environmental degradation, extending service life in outdoor or corrosive environments.

Specification Summary & Compliance

This 3/8"-16 UNC flange nut features precision Class 2B thread fit with coarse thread spacing for optimal performance. Manufactured to inch system standards with dimensions including 11/16" width and 17/32" height. The product is RoHS 3 (2015/863/EU) compliant with exemption 6(a) for lead as an alloying element in steel, ensuring environmental responsibility while maintaining mechanical properties. The flange measures 7/8" in diameter with 0.16" thickness, providing robust bearing surface support for industrial fastening applications.