S-90977A190 7/16"-20 x 1 3/4" Coupling Nuts

Key Features & Benefits at a Glance

• Enhanced load distribution through fully threaded design for secure, vibration-resistant connections in demanding applications
• Superior corrosion resistance with zinc-plated steel construction, extending service life in industrial environments
• High-strength performance meeting Grade 5 specifications, ensuring reliable operation under significant mechanical stress
• Precise thread engagement with UNF fine threading and Class 2B fit, minimizing backlash and improving assembly accuracy
• Easy installation and removal using standard tools thanks to the external hex drive style and right-hand thread direction
• Regulatory compliance assurance with RoHS 3 and REACH conformity, meeting international environmental and safety standards
• Optimized dimensions (1-3/4" length, 5/8" width) providing versatile coupling solutions for various shaft and rod applications

Professional Applications & Engineering Value

This Grade 5 coupling nut delivers exceptional engineering value in industrial fastening scenarios where extended-length connections are critical. The zinc-plated steel construction provides essential corrosion protection for machinery, equipment, and structural assemblies exposed to harsh operating conditions. The UNF fine thread configuration with Class 2B fit ensures precise mating with corresponding male threads, eliminating play and maintaining alignment in coupling applications involving shafts, threaded rods, and other components. The fully threaded design allows for adjustable positioning along the entire length, while the external hex drive facilitates quick installation with common wrenches. This combination of material properties, thread precision, and mechanical strength makes it ideal for heavy-duty applications requiring reliable, long-lasting coupling performance.

Specification Summary & Compliance

This coupling nut features 7/16"-20 UNF fine threading with Class 2B thread fit per standard inch system specifications. Manufacturing complies with Grade 5 strength requirements for consistent mechanical performance. The product fully meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards, ensuring environmental responsibility and regulatory adherence for industrial use.