S-92018A320 5/16"-18 Flange Nuts

Key Features & Benefits at a Glance

• Superior vibration resistance with nylon insert locking that maintains integrity up to 250°F, preventing loosening in high-stress environments
• Enhanced corrosion protection through zinc yellow-chromate plating, extending service life in harsh industrial conditions
• Reliable heavy-duty performance with Grade G strength classification, ensuring consistent load-bearing capacity
• Easy installation and removal using standard external hex drive, compatible with common wrench tools
• Secure fastening distribution thanks to 0.68" flange diameter that spreads clamping force and reduces surface damage
• Precise thread engagement with UNC coarse threads and Class 2B fit, providing smooth assembly and reliable connection
• Wide temperature compatibility with nylon insert rated for operations up to 250°F, suitable for various thermal conditions

Professional Applications & Engineering Value

This Grade G flange lock nut with nylon insert delivers critical vibration resistance in demanding applications where fastener failure is not an option. The zinc yellow-chromate plated steel construction provides exceptional corrosion resistance, making it ideal for automotive assemblies, heavy machinery, and industrial equipment exposed to moisture, chemicals, or outdoor elements. The UNC coarse thread design ensures quick installation and reliable performance in high-vibration environments, while the integrated flange eliminates the need for separate washers, reducing assembly time and component count. Engineered to maintain locking capability at temperatures up to 250°F, this fastener solves common challenges of thermal expansion and constant mechanical stress in heavy-duty fastening applications.

Specification Summary & Compliance

This flange lock nut features 5/16"-18 UNC coarse threads with Class 2B thread fit for precise engagement, manufactured to standard dimensional specifications. The external hex drive (1/2" width) provides standard tool compatibility, while the 0.68" flange diameter and 0.05" thickness offer optimal load distribution. The Grade G strength classification ensures consistent mechanical performance, and the zinc yellow-chromate plating meets industry standards for corrosion protection. This product complies with relevant industrial fastening specifications and is suitable for applications requiring reliable vibration-resistant locking solutions.