S-90983A235 7/8"-14 x 2 1/2" Coupling Nuts

Key Features & Benefits at a Glance

• Exceptional tensile strength with Grade 8 rating for reliable performance in high-stress assemblies and heavy machinery applications.
• Superior corrosion resistance from zinc-plated steel construction, extending service life in harsh industrial environments.
• Precise thread engagement with UNF fine threading (7/8"-14) and Class 2B fit, ensuring secure, vibration-resistant connections.
• Versatile coupling capability as a fully threaded, right-hand nut for joining rods, studs, or bolts of the same diameter.
• Easy installation and removal with external hex drive and standard 1 5/16" width, compatible with common wrenches.
• Rigorous compliance assurance meeting RoHS 3 and REACH standards for safe use in regulated industries.
• Durable 2 1/2" length providing ample thread engagement for stable, long-lasting mechanical joints.

Professional Applications & Engineering Value

This Grade 8 coupling nut is engineered to solve critical challenges in heavy-duty industrial applications where joint integrity is paramount. The zinc-plated steel material resists rust and corrosion, making it ideal for outdoor machinery, construction equipment, and automotive assemblies exposed to moisture. With UNF fine threading (7/8"-14) and a Class 2B thread fit, it delivers precise alignment and minimizes loosening under dynamic loads or vibration. The fully threaded design and external hex drive allow for straightforward installation in confined spaces, reducing assembly time while maintaining high-strength connections between threaded rods or studs. This nut is a trusted solution for structural frameworks, hydraulic systems, and manufacturing fixtures requiring reliable, repeatable fastening.

Specification Summary & Compliance

This coupling nut adheres to UNF thread standards with a 7/8"-14 fine thread and Class 2B thread fit for consistent dimensional accuracy. Manufactured from Grade 8 steel, it meets high mechanical strength requirements. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are upheld. Dimensions include a width of 1 5/16" and length of 2 1/2", supporting standardized industrial use.