S-90654A323 5/8"-11 x 2 1/8" Coupling Nuts

Key Features & Benefits at a Glance

• Maximum load-bearing capacity with ASTM Grade 2H steel construction, ensuring reliable performance under high-stress conditions.
• Secure and precise thread engagement thanks to Class 2B thread fit, reducing the risk of cross-threading and assembly errors.
• Easy installation and removal with external hex drive design, compatible with standard wrenches for efficient maintenance.
• Versatile connectivity through fully threaded, right-hand coarse (UNC) design, ideal for joining long threaded rods or studs.
• Durable and corrosion-resistant steel material, providing long service life in demanding industrial environments.
• Compliance with environmental regulations including RoHS 3 and REACH, ensuring safe and sustainable use in global markets.
• Consistent dimensional accuracy with 1 1/16" width and 2 1/8" length, enabling predictable and repeatable assembly processes.

Professional Applications & Engineering Value

This 5/8"-11 UNC coupling nut is engineered to address critical challenges in industrial fastening, where joining long threaded components without compromising strength is essential. Manufactured from ASTM Grade 2H steel, it offers superior tensile strength and fatigue resistance, preventing failures in high-vibration applications such as machinery frames, construction scaffolding, and heavy equipment assembly. The fully threaded, coarse UNC design with Class 2B thread fit ensures smooth engagement and uniform stress distribution, reducing the risk of strip-out under dynamic loads. Coupled with an external hex drive, it allows for quick installation using common tools, streamlining maintenance in tight spaces. This nut is particularly valuable in structural and mechanical systems requiring durable, corrosion-resistant fasteners that meet rigorous industry standards.

Specification Summary & Compliance

This coupling nut adheres to UNC coarse thread standards with Class 2B thread fit for consistent dimensional accuracy and reliable performance. It complies with ASTM Grade 2H specifications for strength and is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring it is free from hazardous substances and suitable for global industrial use.