S-90977A170 3/8"-24 x 1 3/4" Coupling Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in harsh environments
• High-strength Grade 5 rating ensures reliable performance under heavy loads and vibration
• Precision UNF fine threading (3/8"-24, Class 2B) provides secure, smooth engagement with mating components
• Fully threaded design offers maximum adjustability and connection versatility
• External hex drive style enables easy installation with standard tools in confined spaces
• Robust 1 3/4" length accommodates extended rod or bolt connections with enhanced stability
• Compliance with RoHS 3 and REACH standards guarantees environmental responsibility and global market acceptance

Professional Applications & Engineering Value

This Grade 5 coupling nut delivers exceptional engineering value in demanding industrial applications where reliable threaded connections are critical. The zinc-plated steel construction provides essential corrosion protection for machinery, automotive assemblies, and structural frameworks exposed to moisture or chemicals. Its UNF fine threading (3/8"-24) and Class 2B thread fit ensure precise, vibration-resistant joints that maintain integrity under dynamic loads. The fully threaded design allows for adjustable positioning in extension rods, shaft couplings, and pipe fittings, while the external hex drive facilitates quick installation in hard-to-reach areas. Ideal for OEM manufacturing, maintenance repair operations, and heavy equipment where coupling nuts must withstand continuous stress without loosening.

Specification Summary & Compliance

This coupling nut features 3/8"-24 UNF fine threads with Class 2B tolerance for consistent fit and assembly accuracy. Manufactured from zinc-plated steel to Grade 5 strength standards, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance requirements. Dimensions include 5/8" width across flats and 1 3/4" length, with right-hand threading and fully threaded profile per inch-series fastener specifications.