S-90268A221 3/8"-16 x 6" Coupling Nuts

Key Features & Benefits at a Glance

• Extended reach capability with 6" length for connecting widely spaced threaded rods or studs
• Superior corrosion resistance provided by 18-8 stainless steel construction for long-term reliability in harsh environments
• Secure fastening performance through Class 2B thread fit ensuring consistent engagement and vibration resistance
• Enhanced installation efficiency with external hex drive design allowing standard wrench access
• Optimized thread engagement through partially threaded design concentrating strength where needed
• Industry-standard compatibility with 3/8"-16 UNC coarse threading for broad application versatility
• Environmental compliance assurance meeting RoHS 3 and REACH standards for regulated industries

Professional Applications & Engineering Value

This extra long coupling nut addresses critical challenges in structural connections and mechanical assemblies where standard fasteners fall short. The 18-8 stainless steel construction provides exceptional corrosion resistance, making it ideal for marine, chemical processing, and outdoor applications where environmental factors degrade ordinary fasteners. The 6" length enables connections between widely spaced components that standard coupling nuts cannot bridge, while the partially threaded design concentrates material strength at critical engagement points. The UNC coarse threading with Class 2B fit ensures reliable performance in high-vibration environments common in industrial machinery, construction frameworks, and transportation equipment. This combination of extended reach, durable material, and precision threading delivers engineering solutions for demanding applications requiring both connection strength and long-term reliability.

Specification Summary & Compliance

This coupling nut features 3/8"-16 UNC coarse threading with Class 2B thread fit per ASME B1.1 standards, ensuring precise dimensional accuracy and reliable performance. The partially threaded configuration provides minimum thread length of 5/8" with right-hand thread direction. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental compliance for industrial applications. The external hex drive (5/8" width) and extra long 6" profile meet industry specifications for heavy-duty connection requirements.