S-90268A218 5/16"-18 x 6" Coupling Nuts

Key Features & Benefits at a Glance

• Exceptional connection strength with 6" extra long profile for joining longer threaded rods or bolts in demanding assemblies
• Superior corrosion resistance thanks to 18-8 stainless steel construction, ideal for harsh industrial environments
• Reliable coarse thread engagement with 5/16"-18 UNC threads and Class 2B fit for quick assembly and vibration resistance
• Optimized load distribution through partially threaded design with 5/8" minimum thread length
• Easy installation and removal with external hex drive style for standard wrench compatibility
• Long-term durability with right-hand threading maintaining secure connections under dynamic loads
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for safe industrial usage

Professional Applications & Engineering Value

This extra long coupling nut solves critical challenges in structural and mechanical applications where standard nuts cannot bridge extended gaps. The 18-8 stainless steel construction provides excellent corrosion resistance for outdoor, marine, and chemical processing equipment, while the UNC coarse threads with Class 2B thread fit ensure rapid assembly without compromising connection integrity. The partially threaded design concentrates stress away from the wrenching area, preventing deformation during torque application. Engineers specify this 6" coupling nut for scaffolding systems, conveyor frame assembly, and machinery alignment where vibration resistance and long-term reliability are paramount.

Specification Summary & Compliance

This coupling nut maintains Class 2B thread fit per UNC standards with precise 5/16"-18 coarse threading. Manufacturing follows inch system specifications with 5/8" minimum thread length and 6" overall length. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to industrial safety and environmental standards for global procurement.