S-90659A103 3/8"-16 Flange Nuts

Key Features & Benefits at a Glance

• Superior vibration resistance with anti-rotation serrations that prevent loosening under dynamic loads
• Enhanced durability and corrosion protection through zinc-plated steel construction for extended service life
• Reliable fastening performance with precision UNC coarse threads ensuring easy engagement and secure hold
• Quick installation and removal using the external hex drive design for efficient maintenance
• Stable flange base with 59/64" diameter distributing load evenly and reducing surface damage
• Consistent thread fit with Class 2B tolerance for reliable assembly in industrial settings
• Compliance with environmental standards including REACH and RoHS 3 for safe, sustainable use

Professional Applications & Engineering Value

This zinc-plated steel flange locknut is engineered to address critical challenges in high-vibration environments, such as machinery, automotive assemblies, and structural frameworks. The UNC coarse thread design allows for rapid installation and robust holding power, while the anti-rotation serrations bite into mating surfaces to resist loosening from constant motion or shock loads. Made from zinc-plated steel, it offers excellent corrosion resistance, prolonging component life in harsh conditions. The external hex drive and standard hex profile ensure compatibility with common tools, streamlining maintenance and reducing downtime. Ideal for industrial applications demanding reliable, long-term fastening solutions, this nut combines precision engineering with practical benefits to enhance overall system integrity.

Specification Summary & Compliance

This flange locknut features a 3/8"-16 UNC coarse thread with Class 2B thread fit for precise dimensional accuracy, ensuring consistent performance in assembly. It adheres to standard manufacturing specifications for flange nuts, including a flange diameter of 59/64" and thickness of 0.04". The product is fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) regulations, supporting environmentally responsible and safe industrial use.