S-90997A110 9/16"-18 Flange Nuts

Key Features & Benefits at a Glance

• Exceptional corrosion resistance from A286 Stainless Steel, ideal for harsh environments and extending service life.
• Superior thread engagement and vibration resistance with a Class 3B UNF fine thread fit, ensuring reliable, secure connections.
• High-torque installation capability enabled by the 12-point external drive, perfect for demanding assembly applications.
• Integrated flange eliminates the need for a separate washer, simplifying installation and providing a larger bearing surface.
• Reliable performance in high-temperature settings due to the material properties of A286 stainless steel.
• Precision-engineered dimensions (e.g., 31/32" flange diameter) for consistent fit and function in critical assemblies.

Professional Applications & Engineering Value

This A286 Stainless Steel Flange Nut is engineered to solve critical challenges in high-stakes industries. Its UNF 9/16-18 fine thread with a Class 3B fit provides maximum thread contact, drastically reducing the risk of loosening under extreme vibration—a common failure point in aerospace and automotive applications. The 12-point external drive allows for high-torque installation with standard tools, ensuring a secure clamp force in heavy-duty assemblies. The integral flange distributes load effectively, preventing surface damage and maintaining joint integrity. Manufactured from A286 stainless steel, it offers excellent resistance to oxidation and corrosion, making it a durable, long-lasting industrial fastener for mission-critical systems.

Specification Summary & Compliance

This flange nut conforms to UNF (Unified National Fine) thread standards with a precision Class 3B thread fit. Key dimensions include a 9/16"-18 thread size, 31/32" flange diameter, and 11/16" width. The manufacturing and material quality are consistent with industry standards for high-performance inch-series fasteners.