S-90264A447 5/16"-18 x 1 3/4" Coupling Nuts

Key Features & Benefits at a Glance

• Maximum thread engagement through extra-long 1-3/4" design for superior connection stability in extended assemblies
• Enhanced corrosion resistance with zinc-plated steel construction, ensuring durability in demanding industrial environments
• Reliable coarse threading (5/16"-18 UNC) enables faster assembly and reduced cross-threading risks
• Precision Class 2B thread fit guarantees consistent performance and compatibility with standard mating components
• External hex drive design provides secure tool grip for efficient installation and torque application
• Full threading throughout length allows flexible positioning and adjustable connections
• Compliance with RoHS 3 and REACH regulations ensures environmental responsibility and global market acceptance

Professional Applications & Engineering Value

This extra long coupling nut solves critical alignment and extension challenges in industrial assemblies where standard nuts fall short. The zinc-plated steel construction provides essential corrosion protection for machinery, automotive, and structural applications exposed to harsh conditions. The fully threaded UNC coarse profile combined with Class 2B thread fit ensures reliable engagement with mating components while accommodating minor misalignments. Engineers specify this external hex coupling nut for rod extensions, hydraulic systems, and framework connections where maximum thread contact area is essential for vibration resistance and load distribution. The 1-3/4" length provides exceptional grip length that prevents joint failure in high-stress applications.

Specification Summary & Compliance

This coupling nut maintains Class 2B thread fit per UNC standards with 5/16"-18 coarse threading and right-hand direction. Manufacturing follows inch system specifications with 1-3/4" length and 1/2" width across flats. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting current environmental and substance restriction requirements for industrial hardware components.