S-90977A205 5/8"-11 x 2 1/8" Coupling Nuts

Key Features & Benefits at a Glance

• Exceptional Tensile Strength: Grade 5 classification ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Superior Corrosion Resistance: Zinc-plated steel construction provides a durable protective layer, extending service life in humid or outdoor industrial environments.
• Precision Thread Engagement: Class 2B thread fit guarantees smooth assembly and consistent torque transmission when connecting threaded rods or bolts.
• Optimized Load Distribution: Full threading along the entire 2 1/8" length enables secure connections across the complete engagement surface.
• Easy Installation and Removal: External hex drive design allows for standard wrench access, simplifying maintenance and adjustments.
• Reliable Coarse Thread Performance: 5/8"-11 UNC threading provides excellent resistance to vibration loosening in heavy machinery and structural applications.
• Regulatory Compliance Assurance: Meets RoHS 3 and REACH environmental standards, ensuring safe use across regulated industries.

Professional Applications & Engineering Value

This Grade 5 coupling nut delivers critical engineering solutions for industrial assembly challenges. The zinc-plated steel construction combats corrosion in manufacturing facilities and outdoor installations, while the fully threaded design maintains consistent strength throughout the entire 2 1/8" length. The 5/8"-11 UNC coarse threading with Class 2B fit ensures precise alignment and secure connections between threaded rods in scaffolding, machinery frames, and structural supports. The external hex drive facilitates quick installation with standard tools, reducing assembly time in production environments. These coupling nuts are engineered to withstand vibration and heavy loads in construction, automotive, and industrial equipment applications where joint integrity is paramount.

Specification Summary & Compliance

This coupling nut features 5/8"-11 UNC coarse threading with Class 2B thread fit per standard inch system specifications. The fastener meets Grade 5 strength requirements and is manufactured from zinc-plated steel with dimensions of 2 1/8" length and 13/16" width. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring adherence to international standards for industrial fastener applications.