S-90983A262 1 1/4"-12 x 3" Coupling Nuts

Key Features & Benefits at a Glance

• Exceptional tensile strength with Grade 8 classification, ensuring reliable performance in high-stress industrial applications and reducing failure risks.
• Superior corrosion resistance from zinc-plated steel construction, extending service life in harsh environments and minimizing maintenance needs.
• Precise thread engagement with Class 2B fit and UNF fine threading, providing secure, vibration-resistant connections for critical assemblies.
• Easy installation and removal thanks to the external hex drive design, allowing for standard tool compatibility and efficient maintenance workflows.
• Full threading capability enabling flexible positioning along the entire length, ideal for adjustable or extended rod connections.
• Heavy-duty dimensions (1 7/8" width, 3" length) offering robust load distribution and stability in demanding mechanical systems.
• Compliance with environmental regulations including RoHS 3 and REACH, ensuring safe use in regulated industries and global market acceptance.

Professional Applications & Engineering Value

This Grade 8 coupling nut is engineered to address common challenges in heavy machinery, construction, and automotive sectors where high-strength connections are critical. The zinc-plated steel material combats corrosion in outdoor or humid conditions, while the UNF fine threads and Class 2B fit deliver precise alignment and resistance to loosening under dynamic loads. Its fully threaded design and external hex drive simplify adjustments in tight spaces, making it ideal for coupling long rods, shafts, or piping systems. By ensuring consistent performance in demanding applications, this nut reduces downtime and enhances the reliability of industrial assemblies.

Specification Summary & Compliance

This coupling nut adheres to inch system standards with a thread size of 1 1/4"-12 UNF and Class 2B thread fit for precise tolerances. It meets Grade 8 strength requirements and is manufactured from zinc-plated steel for durability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for global industrial use.