S-90759A660 7/16"-20 Flange Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide steel coating, extending service life in harsh industrial environments.
• Enhanced load distribution from the 53/64" flange diameter, reducing surface pressure and preventing joint loosening.
• High-torque capability with the external 12-point drive, allowing for secure tightening in confined spaces.
• Precise thread engagement with Class 3B UNF fine threads, ensuring reliable, vibration-resistant connections.
• Durable, standardized design featuring a standard hex profile and right-hand thread for compatibility with common tools and components.
• Robust construction from steel material, providing high strength for heavy-duty and demanding applications.
• Wide applicability in inch-system assemblies, making it ideal for machinery, automotive, and construction uses.

Professional Applications & Engineering Value

This black-oxide steel flange nut is engineered to address critical challenges in industrial settings, such as vibration-induced loosening and corrosion. The UNF fine thread with Class 3B fit ensures tight, precise connections that resist shaking and thermal cycling, while the external 12-point drive facilitates high-torque installation in tight spaces. The flange design distributes clamping force over a larger area, reducing the risk of damage to softer materials and maintaining joint integrity under dynamic loads. Ideal for heavy-duty applications in automotive, machinery, and structural assemblies, this nut combines corrosion resistance with reliable performance in demanding environments.

Specification Summary & Compliance

This flange nut adheres to UNF thread standards with a Class 3B thread fit for high precision and a 7/16"-20 fine thread size. It features a 53/64" flange diameter, 0.13" flange thickness, and standard hex profile, manufactured to common industrial specifications. The black-oxide finish provides corrosion protection, and the product is designed to meet general industry requirements for quality and performance, though specific compliance such as RoHS or ASME should be verified per application needs.