S-90983A234 7/8"-9 x 2 1/2" Coupling Nuts

Key Features & Benefits at a Glance

• Exceptional Tensile Strength: Grade 8 material ensures reliable performance under high-stress conditions, preventing fastener failure in critical assemblies.
• Superior Corrosion Resistance: Zinc-plated steel finish provides a durable protective layer, extending service life in harsh or outdoor industrial environments.
• Precision Thread Engagement: Class 2B thread fit offers consistent, reliable connections with reduced risk of cross-threading during installation.
• Heavy-Duty Construction: The 2 1/2" length and standard external hex design enable high torque application and secure joining of long threaded rods.
• Broad Compatibility: 7/8"-9 UNC coarse threading ensures easy mating with standard components, simplifying inventory and assembly processes.
• Enhanced Grip & Torque Transfer: External hex drive style allows for secure tool engagement, facilitating efficient installation and removal with common wrenches.
• Regulatory Compliance: Meets RoHS 3 and REACH environmental standards, ensuring safe use in regulated industries and global markets.

Professional Applications & Engineering Value

This Grade 8 zinc-plated steel coupling nut is engineered to solve critical connection challenges in heavy-duty industrial applications. The fully threaded UNC coarse thread design provides maximum thread engagement across its entire 2 1/2" length, creating exceptionally strong joints between threaded rods in structural frameworks, machinery assembly, and construction projects. The zinc plating delivers essential corrosion protection for equipment exposed to moisture or chemical environments, while the external hex drive enables high-torque installation without stripping. Manufactured to precise Class 2B thread fit standards, this coupling nut ensures consistent performance in vibration-prone applications where connection integrity is paramount, making it ideal for scaffolding, conveyor systems, and heavy equipment maintenance.

Specification Summary & Compliance

This coupling nut features 7/8"-9 UNC coarse threading with Class 2B thread fit for precise dimensional accuracy and optimal engagement. The external hex drive measures 1 5/16" across flats with a 2 1/2" fully threaded length. Manufactured from Grade 8 steel with zinc plating, this fastener complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and material safety in industrial applications.