S-90977A210 5/8"-18 x 2 1/8" Coupling Nuts
Coupling Nuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Enhanced load distribution through fully threaded design for maximum engagement and connection integrity
- Superior corrosion resistance with zinc-plated steel construction for extended service life in harsh environments
- High-strength performance meeting Grade 5 specifications for demanding industrial applications
- Precision threading with Class 2B fit and 5/8"-18 UNF fine threads ensuring secure, vibration-resistant connections
- Easy installation and removal with standard external hex drive for compatibility with common tools
- Regulatory compliance with RoHS 3 and REACH standards for safe, environmentally responsible manufacturing
- Versatile coupling capability with standard profile and right-hand threading for various rod and stud connections
Professional Applications & Engineering Value
This Grade 5 coupling nut delivers exceptional engineering value in industrial settings where reliable threaded connections are critical. The zinc-plated steel construction provides essential corrosion protection, extending fastener life in exposed or humid conditions. The fully threaded 5/8"-18 UNF design with Class 2B thread fit ensures precise engagement with mating components, preventing loosening under vibration and maintaining structural integrity in heavy machinery, construction equipment, and transportation systems. The external hex drive allows for high-torque installation using standard wrenches, streamlining assembly processes while the fine threading offers superior clamping force distribution compared to coarse thread alternatives.
Specification Summary & Compliance
This coupling nut features 5/8"-18 UNF fine threading with Class 2B thread fit per UNF standards, ensuring precise dimensional accuracy and reliable performance. Manufactured from zinc-plated steel and certified to Grade 5 strength requirements, it meets rigorous industrial standards. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to environmental and safety protocols for industrial fastener applications.
