S-90268A217 5/16"-18 x 3" Coupling Nuts

Key Features & Benefits at a Glance

• Exceptional corrosion resistance from 18-8 stainless steel construction, ideal for harsh environments and long-term reliability
• Superior tensile strength and durability for demanding industrial applications requiring heavy-duty performance
• Precise Class 2B thread fit ensures smooth assembly and reliable connections with reduced risk of cross-threading
• Extra long 3" length with partial threading provides extended engagement for joining long rods or studs securely
• External hex drive design allows for easy installation and removal using standard wrenches
• Compliance with RoHS 3 and REACH standards guarantees environmental safety and regulatory adherence for global supply chains
• Coarse UNC threading (5/16"-18) offers quick assembly and high resistance to vibration loosening

Professional Applications & Engineering Value

This extra long coupling nut is engineered to solve critical challenges in industrial assembly and construction projects where extended reach and robust performance are essential. Manufactured from 18-8 stainless steel, it provides excellent resistance to corrosion and oxidation, making it suitable for outdoor, marine, and chemical processing environments. The partially threaded design and 3-inch length allow for secure joining of long threaded rods, studs, or pipes, while the UNC coarse thread ensures rapid installation and maintains integrity under dynamic loads. Its external hex drive facilitates straightforward torque application, reducing installation time and labor costs in heavy-duty applications such as structural frameworks, machinery, and automotive assemblies.

Specification Summary & Compliance

This coupling nut adheres to UNC thread standards with a Class 2B thread fit for consistent dimensional accuracy and compatibility. It features a 5/16"-18 coarse thread, right-hand threading, and a minimum thread length of 5/8". The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety requirements for industrial use.