S-91034A412 1/4"-20 x 7/8" 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
- Superior corrosion resistance with black-oxide steel finish for extended service life in demanding environments
- Exceptional load distribution through fully threaded design that maintains uniform stress across the entire coupling length
- Quick and secure assembly with coarse UNC threading that accelerates installation while maintaining Class 2B precision fit
- Reliable torque transmission via external hex drive that provides positive grip for standard wrench applications
- Optimized dimensional stability with 7/8" length and 3/8" width for consistent performance in extended coupling applications
- Enhanced workplace safety through RoHS 3 and REACH compliance, ensuring environmental and regulatory adherence
- Versatile right-hand threading compatible with standard industrial components for broad application compatibility
Professional Applications & Engineering Value
This black-oxide steel coupling nut delivers critical engineering solutions for industrial assembly challenges where extended thread engagement is required. The 1/4"-20 UNC coarse threading with Class 2B thread fit ensures rapid installation while maintaining precise tolerance control in high-vibration environments. The fully threaded design provides maximum thread contact area, distributing tensile loads evenly across the entire 7/8" length to prevent stress concentration points. Ideal for connecting threaded rods, extending stud lengths, or joining components in machinery, automotive, and construction applications, this external hex drive coupling nut offers reliable performance where corrosion resistance and regulatory compliance are paramount.
Specification Summary & Compliance
Manufactured to precise inch system dimensions with 1/4"-20 UNC coarse threads maintaining Class 2B thread fit tolerances for consistent mating with Class 2A external threads. The black-oxide steel construction provides surface protection while the fully threaded, right-hand design ensures complete engagement. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for industrial safety and environmental standards.
