S-91627A111 5/8"-11 Flange Nuts

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with Grade 8 strength classification, ensuring reliable performance in high-stress industrial and automotive applications.
• Superior corrosion resistance from zinc yellow-chromate plating, extending service life in harsh or outdoor environments.
• Integrated flange design with a 1 9/32" diameter, distributing clamping force evenly to prevent surface damage and reduce the need for separate washers.
• Easy installation and removal with a standard external hex drive and 15/16" width, compatible with common wrenches for efficient assembly.
• Precise thread engagement thanks to UNC coarse 5/8"-11 threads and Class 2B fit, minimizing cross-threading risks and ensuring secure fastening.
• Heavy-duty durability in inch-system measurements, ideal for machinery, equipment, and structural applications requiring robust, long-term fastening solutions.

Professional Applications & Engineering Value

This Grade 8 flange nut is engineered to address common industrial challenges, such as vibration loosening and corrosion-induced failure. The zinc yellow-chromate plated steel construction provides a protective barrier against moisture, chemicals, and UV exposure, making it suitable for automotive assemblies, heavy machinery, and outdoor infrastructure. The UNC coarse threads and Class 2B thread fit ensure quick, reliable installation with reduced risk of stripping, while the integrated flange eliminates the need for additional components, streamlining assembly processes. Its right-hand thread direction and external hex drive offer compatibility with standard tools, enhancing efficiency in maintenance and production lines.

Specification Summary & Compliance

This flange nut adheres to UNC thread standards with a 5/8"-11 coarse thread size and Class 2B thread fit for consistent dimensional accuracy. Manufactured from high-strength steel with zinc yellow-chromate plating, it meets industry requirements for durability and corrosion protection. The product complies with relevant ASME and RoHS/REACH standards, ensuring safety and environmental responsibility in industrial use.