S-90983A224 5/8"-18 x 2 1/8" Coupling Nuts

Key Features & Benefits at a Glance

• Exceptional tensile strength with Grade 8 classification, ensuring reliable performance in high-stress industrial applications
• Superior corrosion resistance through zinc-plated steel construction, extending service life in demanding environments
• Precise thread engagement with Class 2B thread fit, providing consistent, vibration-resistant connections
• Versatile coupling capability with full threading and UNF fine thread design, enabling secure joining of threaded rods or bolts
• Easy installation and removal featuring a standard external hex drive for straightforward wrench access
• Compliant with environmental regulations including RoHS 3 and REACH, meeting international standards for industrial use
• Durable heavy-duty construction with 2 1/8" length and 15/16" width, designed for long-term reliability in structural applications

Professional Applications & Engineering Value

This Grade 8 coupling nut delivers exceptional engineering value through its zinc-plated steel construction and UNF fine threading, specifically designed to address critical industrial fastening challenges. The fully threaded design with Class 2B thread fit ensures precise alignment and maximum thread engagement when connecting threaded rods in structural frameworks, machinery assembly, or construction applications. The external hex drive profile allows for high-torque installation using standard tools, while the right-hand thread direction provides compatibility with conventional fastening systems. Engineered to prevent loosening under vibration and sustain heavy loads, this heavy-duty coupling nut offers reliable performance in automotive, manufacturing, and infrastructure projects where joint integrity is paramount.

Specification Summary & Compliance

This coupling nut maintains Class 2B thread fit tolerances per UNF standards with 5/8"-18 fine threading and right-hand thread direction. Manufactured from zinc-plated steel with dimensions of 15/16" width and 2 1/8" length, it conforms to Grade 8 strength requirements. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to international environmental and safety standards for industrial components.