S-90983A246 1 1/4"-7 x 3" Coupling Nuts

Key Features & Benefits at a Glance

• Exceptional tensile strength with Grade 8 classification ensures reliable performance in high-stress applications and prevents failure under heavy loads
• Superior corrosion resistance through zinc-plated steel construction extends service life in demanding industrial environments
• Optimal torque transmission via external hex drive design allows for secure installation with standard tools and prevents stripping
• Precise thread engagement with Class 2B fit and UNC coarse threading provides consistent mating and reduces cross-threading risks
• Extended connection capability through 3" fully threaded length accommodates various rod and bolt lengths for versatile applications
• Regulatory compliance assurance with RoHS 3 and REACH standards meets international environmental and safety requirements
• Heavy-duty construction with 1 7/8" width provides substantial bearing surface for distributed load transfer

Professional Applications & Engineering Value

This Grade 8 coupling nut delivers exceptional engineering value in demanding industrial settings where connection integrity is paramount. The zinc-plated steel construction provides critical corrosion protection for applications exposed to moisture, chemicals, or outdoor elements, significantly extending service life and reducing maintenance frequency. The 1 1/4"-7 UNC coarse threading with Class 2B thread fit ensures reliable engagement with mating components while accommodating minor misalignments common in structural assemblies. The external hex drive configuration enables high-torque installation without specialized tools, making it ideal for construction equipment, machinery frames, and heavy structural connections where vibration resistance and load-bearing capacity are essential. The fully threaded design allows for adjustable positioning and secure fastening across various material thicknesses.

Specification Summary & Compliance

This heavy-duty coupling nut maintains precise Class 2B thread fit tolerances according to UNC standards, ensuring consistent mating performance across industrial applications. Manufacturing complies with Grade 8 strength specifications for maximum reliability. The product fully meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) standards for chemical safety, making it suitable for global industrial markets with strict environmental regulations.