S-90977A037 7/8"-9 x 2 1/2" Coupling Nuts

Key Features & Benefits at a Glance

• Exceptional tensile strength from Grade 5 steel construction, ensuring reliable performance in high-stress applications
• Superior corrosion resistance with zinc plating, extending service life in harsh industrial environments
• Easy installation and removal thanks to the external hex drive design and coarse UNC threading
• Secure and precise thread engagement with Class 2B fit, minimizing the risk of cross-threading or loosening
• Versatile fully threaded design allowing connection of two threaded rods or bolts at any point along the nut's length
• Robust dimensional profile (1-1/4" width x 2-1/2" length) providing substantial bearing surface for enhanced stability
• Compliance with international safety standards including RoHS 3 and REACH, ensuring environmental and workplace safety

Professional Applications & Engineering Value

This Grade 5 coupling nut delivers critical engineering value in demanding assembly scenarios where extended thread engagement is required. The zinc-plated steel construction provides essential corrosion protection for outdoor equipment, structural frameworks, and machinery exposed to moisture or chemicals. With its fully threaded UNC coarse profile and Class 2B thread fit, it solves common installation challenges by enabling quick assembly without sacrificing connection integrity. The external hex drive style accommodates standard wrenching tools, streamlining maintenance in confined spaces. Ideal for connecting threaded rods in construction, manufacturing jigs, and heavy equipment repair, this coupling nut ensures reliable load transfer while meeting stringent industrial compliance requirements.

Specification Summary & Compliance

This coupling nut features 7/8"-9 UNC coarse threading with Class 2B thread fit per ASME B1.1 standards, ensuring precise dimensional accuracy and interchangeability. Manufactured from Grade 5 medium-carbon steel with zinc plating for corrosion protection. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to hazardous substance restrictions. Dimensions: 1-1/4" width across flats, 2-1/2" length fully threaded.