S-91034A419 7/8"-9 x 2 1/2" 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
- Superior corrosion resistance from black-oxide steel coating, extending service life in harsh industrial environments
- High-strength coupling capability with fully threaded design for maximum engagement and load distribution
- Easy installation and removal thanks to external hex drive style and coarse UNC threading
- Precise thread alignment ensured by Class 2B thread fit for reliable, vibration-resistant connections
- Heavy-duty construction with 1-1/4" width and 2-1/2" length for demanding applications
- Compliance with environmental regulations including RoHS 3 and REACH for global market acceptance
- Standard profile compatibility with existing industrial equipment and fastener systems
Professional Applications & Engineering Value
This black-oxide steel coupling nut addresses critical engineering challenges in industrial assembly where corrosion resistance and structural integrity are paramount. The fully threaded UNC coarse thread design ensures maximum thread engagement when connecting two threaded rods or pipes, preventing loosening under vibration while maintaining consistent load distribution. The external hex drive style facilitates quick installation with standard tools, reducing assembly time in manufacturing, construction, and machinery applications. The Class 2B thread fit provides the optimal balance between ease of assembly and secure fastening, making it ideal for heavy-duty industrial applications where reliability cannot be compromised.
Specification Summary & Compliance
This coupling nut features 7/8"-9 UNC coarse threading with Class 2B thread fit per ASME B1.1 standards, ensuring precise dimensional accuracy and interchangeability. The standard coupling nut profile measures 1-1/4" width and 2-1/2" length with right-hand threaded, fully threaded construction. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming suitability for regulated industrial markets worldwide.
