S-90104A037 7/8"-9 x 2 1/2" Coupling Nuts

Key Features & Benefits at a Glance

• Exceptional corrosion resistance from 316 stainless steel material, ideal for harsh environments including marine and chemical processing applications.
• Reliable, vibration-resistant connections ensured by the coarse 7/8"-9 UNC thread profile and Class 2B thread fit for secure fastening.
• Easy installation and removal with a standard external hex drive, allowing for use with common wrenches and tools.
• Full threading for maximum engagement along the entire 2 1/2" length, providing consistent strength and load distribution.
• Robust construction with a 1 1/4" width offers superior torque resistance and mechanical stability in high-stress assemblies.
• Compliance with stringent environmental regulations including RoHS 3 and REACH, ensuring safety and sustainability in global supply chains.
• Standard inch system and right-hand thread design for seamless compatibility with existing North American machinery and components.

Professional Applications & Engineering Value

This 316 stainless steel coupling nut is engineered to solve critical challenges in demanding industrial settings where corrosion resistance and thread reliability are paramount. The fully threaded design and UNC coarse threading provide excellent grip and vibration resistance, preventing loosening in high-stress applications such as heavy machinery, structural frameworks, and fluid handling systems. The external hex drive facilitates quick assembly and disassembly, reducing downtime during maintenance. Its Class 2B thread fit ensures precise, consistent engagement with mating components, minimizing the risk of cross-threading and thread damage. Ideal for use in chemical plants, offshore platforms, and food processing equipment, this nut delivers long-term performance under extreme conditions, reducing replacement frequency and total cost of ownership.

Specification Summary & Compliance

This coupling nut adheres to UNC thread standards with a Class 2B thread fit for consistent dimensional accuracy and reliable performance. Manufactured from 316 stainless steel with a standard profile, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances. The nut features a right-hand thread direction, coarse thread spacing, and is supplied in the inch system with precise dimensions of 1 1/4" width and 2 1/2" length, conforming to industry specifications for coupling nuts in mechanical and structural applications.