S-91034A135 7/8"-9 x 2 1/4" Coupling Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide steel coating, extending service life in demanding industrial environments
• Exceptional tensile strength from fully threaded construction, ensuring reliable connections under heavy loads
• Quick and secure installation with external hex drive design, compatible with standard wrench tools
• Precision thread engagement with Class 2B UNC coarse threading, providing consistent performance in assembly applications
• Versatile right-hand threading compatible with standard industrial components and existing inventory
• Robust dimensional profile with 1 7/16" width and 2 1/4" length, offering substantial bearing surface for stable connections
• Environmental compliance assurance meeting RoHS 3 and REACH standards for sustainable manufacturing practices

Professional Applications & Engineering Value

This black-oxide steel coupling nut delivers critical performance in heavy-duty industrial applications where extended thread engagement is required. The fully threaded UNC coarse thread design provides maximum surface contact between mating components, distributing stress evenly to prevent thread stripping and connection failure. The external hex drive configuration enables high-torque installation using common tools, while the black-oxide surface treatment creates a protective barrier against rust and corrosion in challenging environments. Engineered for connecting threaded rods, pipes, and structural components, this 7/8"-9 coupling nut maintains integrity in construction, machinery assembly, and infrastructure projects where vibration resistance and long-term reliability are paramount.

Specification Summary & Compliance

This coupling nut features Class 2B thread fit with UNC coarse threading (7/8"-9) and right-hand thread direction, manufactured to inch system specifications. The standard coupling nut profile measures 1 7/16" in width and 2 1/4" in length with fully threaded construction. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring regulatory compliance for industrial and commercial applications.