S-90977A220 3/4"-16 x 2 1/4" Coupling Nuts

Key Features & Benefits at a Glance

• Enhanced load distribution through fully threaded design for consistent tension across connected components
• Superior corrosion resistance with zinc-plated steel construction in harsh industrial environments
• Precise thread engagement with Class 2B fit ensuring reliable connections without cross-threading
• High-torque capability from Grade 5 strength rating and external hex drive for demanding applications
• Fine thread advantage with 3/4"-16 UNF spacing providing improved vibration resistance
• Regulatory compliance meeting RoHS 3 and REACH standards for global industrial use
• Standardized dimensions (1" width, 2 1/4" length) ensuring compatibility with existing assembly systems

Professional Applications & Engineering Value

This Grade 5 zinc-plated steel coupling nut solves critical connection challenges in heavy machinery, structural frameworks, and precision equipment assemblies. The fully threaded 3/4"-16 UNF design with Class 2B thread fit maintains alignment integrity while the external hex drive enables high-torque installation in confined spaces. The zinc plating provides sacrificial protection against corrosion in outdoor or high-moisture environments, extending service life in construction, automotive, and manufacturing applications where vibration resistance and fine threading prevent joint loosening under dynamic loads.

Specification Summary & Compliance

Manufactured to UNF thread standards with Class 2B thread fit tolerance for precise engagement. Meets Grade 5 strength classification requirements and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Standard inch dimensions (1" width × 2 1/4" length) ensure interchangeability with industrial fastener systems.