S-91045A030 5/16"-18 Flange Nuts

Key Features & Benefits at a Glance

• Enhanced load distribution with 3/4" flange diameter to prevent surface damage and reduce the need for separate washers
• Superior corrosion resistance thanks to black-oxide steel construction, extending service life in demanding industrial environments
• Precise leveling capability with up to 1½° maximum correction for accurate alignment in machinery and structural applications
• Reliable thread engagement with Class 2B coarse UNC threads ensuring easy installation and vibration resistance
• Optimized torque transmission through external hex drive design for secure fastening with standard tools
• Robust structural integrity from steel washer construction with 5/32" thickness for sustained performance under heavy loads
• Environmental compliance with RoHS 3 standards for safe use across regulated industries

Professional Applications & Engineering Value

This heavy-duty flange nut solves critical alignment challenges in industrial equipment assembly, machinery leveling, and structural frameworks. The black-oxide steel construction provides essential corrosion protection where moisture or chemicals are present, while the integrated steel washer and 3/4" flange diameter distribute clamping force effectively to prevent joint loosening from vibration. Engineers value the Class 2B thread fit with UNC coarse threads for rapid installation in time-sensitive maintenance operations, and the 1½° leveling correction capability ensures precise equipment positioning without additional components. The external hex drive design guarantees compatibility with standard wrenching tools, making it ideal for automotive, manufacturing, and construction applications where reliability and speed are paramount.

Specification Summary & Compliance

This flange nut maintains Class 2B thread fit per UNC standards with 5/16"-18 coarse thread spacing, ensuring consistent engagement and interchangeability. Manufacturing adheres to inch system dimensions including 9/16" width and 17/32" height with 3/4" flange diameter and 0.13" flange thickness. The product is RoHS 3 (2015/863/EU) compliant with exemption 6(a) for lead as an alloying element in steel, meeting international environmental regulations for industrial components.