S-90389A115 5/16"-18 Flange Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh environments like marine and chemical applications
• Enhanced load distribution thanks to the 11/16" flange diameter, reducing surface pressure and preventing material damage
• Reliable coarse threading with UNC 5/16"-18 and Class 2B fit for quick assembly and vibration resistance in heavy-duty settings
• Easy installation and removal using standard external hex drive tools, saving time and labor costs
• Durable, long-lasting performance with a 0.13" flange thickness and standard hex profile, ensuring stability under stress
• Compliance with environmental standards including RoHS 3 and REACH, supporting sustainable and safe industrial practices
• Versatile right-hand thread design compatible with common UNC fasteners, streamlining inventory and maintenance

Professional Applications & Engineering Value

This 5/16"-18 UNC flange nut in 316 stainless steel addresses critical challenges in demanding sectors such as construction, marine, and chemical processing. Its corrosion-resistant material withstands exposure to saltwater, chemicals, and extreme weather, reducing maintenance frequency and downtime. The integrated flange design eliminates the need for separate washers, distributing clamp load evenly to prevent loosening from vibrations—common in machinery and structural assemblies. With a coarse thread and Class 2B fit, it ensures secure, rapid fastening in high-stress applications, while the external hex drive allows for efficient torque application with standard tools. Ideal for heavy-duty equipment and industrial nuts requirements, it enhances reliability and safety in critical joints.

Specification Summary & Compliance

This flange nut features precise UNC 5/16"-18 coarse threads with a Class 2B thread fit for consistent engagement and tolerance. Dimensions include an 11/16" flange diameter, 0.13" flange thickness, 1/2" width, and 9/32" height, adhering to standard inch measurements. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global industrial use. Manufactured to meet common industry specifications for external hex drive and right-hand thread applications, it supports quality and regulatory assurance in procurement.