Eaton Crouse-Hinds 3-1/2" EMT Set Screw Coupling, Zinc Plated Steel

Eaton Crouse-Hinds 3-1/2" EMT Set Screw Coupling, Zinc Plated Steel

Heavy-Duty Four-Screw Design for Maximum Conduit Security

The Eaton Crouse-Hinds 3-1/2" EMT Set Screw Coupling is a professional-grade conduit fitting engineered for secure EMT conduit connections in commercial and industrial electrical installations. This zinc plated steel coupling delivers superior holding power and corrosion resistance with its innovative four tightening screw design, trusted by electrical contractors for over 100 years.

Key Features & Benefits

Superior Connection Security

• Four Tightening Screws - Provides 360-degree grip distribution for maximum holding power and prevents conduit pullout
• Set Screw Design - Creates reliable mechanical connection that maintains electrical continuity throughout the system
• Precision Threading - Ensures consistent, secure installation with standard electrical tools
• Heavy-Duty Construction - Engineered to withstand mechanical stress and vibration in demanding applications

Corrosion Protection & Durability

• Zinc Plated Steel Construction - Provides excellent corrosion resistance while maintaining superior strength compared to aluminum alternatives
• Weather Resistant Finish - Protects against moisture, humidity, and environmental contaminants
• Long-Term Reliability - Engineered for decades of service in commercial and industrial environments

Professional Installation Advantages

• 3-1/2" Trade Size - Perfect for large conduit runs requiring maximum wire capacity
• Standard EMT Compatibility - Works with all standard 3-1/2" EMT conduit systems
• Contractor-Friendly Design - Reduces installation time with straightforward set screw tightening process

Technical Specifications

This coupling accommodates 3-1/2" trade size EMT conduit with zinc plated steel construction measuring 4.5" in length, 4.25" in width and height, weighing 2.4 pounds for substantial durability. The four-screw configuration ensures optimal grip distribution around the conduit circumference, while NEC/CEC compliance guarantees code-approved installations. The coupling is specifically designed for ordinary/non-hazardous locations and provides reliable electrical continuity for grounding systems.

Installation Process

1. Verify conduit ends are cut square and deburred to prevent damage to coupling threads
2. Insert first EMT conduit section fully into one end of the coupling until it reaches the internal stop
3. Insert second conduit section into the opposite end, ensuring both conduits are properly seated
4. Tighten the four set screws evenly using appropriate screwdriver, alternating between screws for uniform pressure
5. Verify secure connection by gently testing conduit movement - properly installed coupling should show no play
6. Confirm electrical continuity if coupling is part of equipment grounding system

Applications

Perfect for:

• Commercial Buildings - Office complexes, retail centers, hospitals requiring large conduit capacity
• Industrial Facilities - Manufacturing plants, processing facilities, warehouses with heavy electrical loads
• Municipal Infrastructure - Schools, government buildings, public facilities with extensive electrical systems
• Equipment Connections - Motor control centers, switchgear, and large electrical panels
• Conduit Extensions - Joining EMT sections in long conduit runs without interruption
• Maintenance Applications - Replacing damaged conduit sections while maintaining system integrity
• Heavy-Duty Installations - Areas subject to vibration or mechanical stress requiring secure connections
• Code-Required Installations - Projects demanding NEC/CEC compliant fittings and materials

EMT Coupling System Benefits

EMT set screw couplings provide the most reliable method for joining electrical metallic tubing sections, offering superior mechanical strength compared to compression alternatives while maintaining excellent electrical continuity. The set screw design creates a permanent connection that won't loosen over time, making it ideal for installations where long-term reliability is critical.

Why Choose Four-Screw Design?

The innovative four-screw configuration distributes clamping force evenly around the conduit circumference, preventing deformation while ensuring maximum holding power. This design eliminates the weak points common in two-screw couplings, providing electrical contractors with confidence in high-stress applications where conduit security is paramount for system safety and code compliance.