S-90977A034 1/2"-20 x 1 3/4" Coupling Nuts

Key Features & Benefits at a Glance

• Enhanced Tensile Strength: Grade 5 classification ensures reliable performance under high-stress conditions, preventing failure in demanding applications.
• Superior Corrosion Resistance: Zinc-plated steel construction provides a durable barrier against rust and environmental degradation, extending service life.
• Precise Thread Engagement: Class 2B thread fit offers consistent, smooth assembly with reduced risk of cross-threading for faster, more reliable installations.
• Optimized Torque Transmission: External hex drive design allows for high-torque application using standard wrenches, ensuring secure connections.
• Versatile Coupling Capability: Fully threaded, right-hand UNF fine threading (1/2"-20) enables secure joining of two externally threaded rods or studs.
• Regulatory Compliance Assurance: Meets RoHS 3 and REACH environmental standards, making it suitable for regulated industries and global supply chains.
• Dimensional Consistency: Standard 3/4" width and 1 3/4" length provide predictable performance and ease of integration into existing assemblies.

Professional Applications & Engineering Value

This zinc-plated steel coupling nut is engineered to solve critical connection challenges in industrial applications where long-term reliability is non-negotiable. The Grade 5 material provides the necessary tensile strength to maintain structural integrity in machinery, construction, and automotive assemblies subjected to vibration and dynamic loads. The UNF fine threading (1/2"-20) with Class 2B fit ensures precise engagement with mating components, minimizing the risk of loosening and reducing maintenance downtime. The external hex drive facilitates quick installation and removal with common tools, streamlining assembly processes. Its fully threaded design offers maximum adjustability for joining threaded rods, making it indispensable for frame construction, suspension systems, and other extended fastening requirements.

Specification Summary & Compliance

This coupling nut features 1/2"-20 UNF fine threading with Class 2B thread fit per unified screw thread standards, ensuring dimensional accuracy and interchangeability. Manufactured from zinc-plated steel to Grade 5 strength specifications, it meets rigorous mechanical performance requirements. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious procurement and use in regulated markets.