S-90977A240 1 1/4"-7 x 3" Coupling Nuts

Key Features & Benefits at a Glance

• Enhanced load distribution through full-length threading for superior connection integrity in demanding applications
• Exceptional corrosion resistance with zinc-plated steel construction, extending service life in harsh industrial environments
• High-strength performance meeting Grade 5 standards, ensuring reliable operation under heavy mechanical stress
• Precision thread engagement with Class 2B fit for smooth assembly and reduced risk of cross-threading
• Optimized torque transmission via external hex drive design, facilitating secure installation with standard tools
• Versatile coarse threading (1 1/4"-7 UNC) enabling rapid assembly in time-sensitive industrial operations
• Regulatory compliance assurance with RoHS 3 and REACH standards, supporting sustainable procurement policies

Professional Applications & Engineering Value

Engineered for heavy-duty industrial connections, this Grade 5 coupling nut addresses critical challenges in structural assembly and machinery maintenance. The zinc-plated steel construction provides a durable barrier against oxidation and chemical exposure, while the fully threaded UNC coarse profile ensures rapid engagement with mating components. Its 3-inch length and external hex drive enable secure installation in confined spaces where torque access is limited. Ideal for extending threaded rods in construction frameworks, connecting hydraulic components, or assembling conveyor systems, this coupling nut delivers reliable performance in high-vibration environments where connection failure is not an option.

Specification Summary & Compliance

Manufactured to inch system standards with 1 1/4"-7 UNC coarse threads and Class 2B thread fit for consistent dimensional accuracy. Complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, containing no restricted substances above threshold limits. Meets Grade 5 strength classification requirements for industrial fastener applications.