S-90264A111 5/16"-18 x 1 1/8" Coupling Nuts

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with zinc-plated steel construction for extended service life in harsh industrial environments
• Superior load distribution through fully threaded design that maintains consistent strength across the entire coupling length
• Quick and secure installation with standard external hex profile allowing for standard wrench access and reliable torque application
• Precise thread engagement with Class 2B thread fit ensuring smooth assembly and reduced cross-threading risks
• Broad compatibility with UNC coarse threading (5/16"-18) that matches common industrial fastener systems
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for environmentally responsible manufacturing
• Optimized length-to-diameter ratio at 1-1/8" length providing sufficient thread engagement while maintaining structural integrity

Professional Applications & Engineering Value

This zinc-plated steel coupling nut delivers exceptional engineering value in applications requiring extended thread engagement between two male-threaded components. The UNC coarse threading (5/16"-18) with Class 2B thread fit ensures reliable performance in vibration-prone environments, while the fully threaded design maintains uniform stress distribution across the entire 1-1/8" length. The external hex drive style facilitates straightforward installation using standard tools, making it ideal for assembly lines and maintenance operations. Particularly valuable in machinery assembly, structural frameworks, and equipment repair scenarios, this coupling nut solves common challenges of thread alignment and corrosion resistance with its zinc-plated surface treatment that provides sacrificial protection against environmental degradation.

Specification Summary & Compliance

This coupling nut features UNC coarse threading (5/16"-18) with Class 2B thread fit per standard inch measurement system requirements. The product maintains dimensional accuracy with standard external hex profile measuring 1/2" across flats and 1-1/8" length. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and restricted substance compliance for industrial applications worldwide.