Eaton Crouse-Hinds 3/4" EMT to...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$53.88
$3.66

Eaton Crouse-Hinds 3/4" EMT to Rigid Combination Coupling, Zinc Plated Steel

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Model: 421
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$53.88
$3.66
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Eaton Crouse-Hinds 3/4" EMT to Rigid Combination Coupling

Professional-Grade Conduit Transition Solution for Mixed Electrical Systems

The Eaton Crouse-Hinds 3/4" EMT to Rigid Combination Coupling is a professional-grade transition fitting engineered for seamless connections between EMT and rigid conduit systems. This zinc plated steel coupling delivers superior corrosion resistance and reliable performance for commercial and industrial electrical installations where mixed conduit types are required.

Key Features & Benefits

Superior Material Construction

  • Zinc Plated Steel Construction - Provides exceptional corrosion resistance and long-term durability in demanding environments
  • Professional-Grade Manufacturing - Precision-engineered to Eaton Crouse-Hinds quality standards for decades of reliable service
  • Robust Design - Heavy-duty construction withstands mechanical stress and environmental challenges
  • Dimensional Stability - Maintains precise fit and connection integrity over time

Versatile Connection Technology

  • Dual Set Screw Design - Features set screw connections on both EMT and rigid sides for secure, reliable attachment
  • 3/4" Trade Size Compatibility - Perfect fit for standard 3/4" EMT and rigid conduit systems
  • Combination Type Functionality - Enables seamless transition between different conduit types in single installation
  • Easy Installation - Straightforward connection process reduces installation time and labor costs

Code Compliance & Safety

  • NEC/CEC Compliant - Meets all applicable electrical code requirements for conduit connections
  • Grounding Continuity - Maintains proper electrical grounding path through the connection
  • Professional Standards - Engineered to meet the demanding requirements of commercial electrical contractors
  • Quality Assurance - Backed by Eaton Crouse-Hinds' century of electrical innovation and reliability

Technical Specifications

This combination coupling features 3/4" trade size compatibility on both ends, with EMT set screw connection on one side and rigid set screw connection on the other. The zinc plated steel construction provides superior corrosion resistance while maintaining the strength required for professional installations. Product dimensions are 2.81" length x 1.25" width x 1.25" height, with a lightweight 0.25 lb design that doesn't add unnecessary weight to conduit runs. The coupling is designed for ordinary/non-hazardous locations and complies with NEC/CEC standards for electrical fitting applications.

Installation Process

  1. Verify conduit ends are cut square and deburred to prevent damage to conductors
  2. Insert EMT conduit into the EMT side of the coupling until it bottoms out
  3. Tighten the EMT side set screws to manufacturer's specified torque
  4. Insert rigid conduit into the rigid side of the coupling until fully seated
  5. Tighten the rigid side set screws to secure the connection
  6. Verify both connections are secure and properly grounded before energizing

Applications

Perfect for:

  • Commercial Buildings - Office complexes, retail spaces, and healthcare facilities requiring mixed conduit systems
  • Industrial Facilities - Manufacturing plants and processing facilities with varying conduit requirements
  • Equipment Connections - Motor control centers, switchgear, and electrical panels with different conduit types
  • Renovation Projects - Connecting new EMT runs to existing rigid conduit installations
  • Mixed System Installations - Projects requiring both EMT flexibility and rigid conduit strength
  • Transition Points - Areas where conduit type changes due to environmental or structural requirements
  • Municipal Infrastructure - Schools, government buildings, and public facilities with complex electrical systems
  • Agricultural Systems - Farm buildings and processing facilities requiring durable conduit connections

Combination Coupling System Benefits

Combination couplings eliminate the need for multiple fittings and junction boxes when transitioning between conduit types, reducing installation complexity and potential failure points. This approach provides a more streamlined, professional appearance while maintaining full electrical continuity and code compliance. The direct connection method also reduces material costs and installation time compared to alternative transition methods.

Why Choose Zinc Plated Steel?

Zinc plated steel construction offers the perfect balance of strength, corrosion resistance, and cost-effectiveness for professional electrical installations. The zinc plating provides superior protection against rust and corrosion compared to standard steel, while maintaining the mechanical strength required for demanding applications. This material choice ensures long-term reliability and performance, making it the preferred option for electrical contractors who demand quality and durability in their conduit system components.

Manufacturer Resources

Product Specs

Area Classification:
Ordinary/Non-Hazardous Locations
Conduit Type:
EMT
Product Height:
1.25 in
Product Length Depth:
2.81 in
Product Weight:
.25 lb
Product Width:
1.25 in
Standards Type:
NEC/CEC
Trade Size:
3/4"-3/4"
Product Type:
Combination Coupling
Product Group:
Electrical Fitting
Department:
Electrical
Product Subgroup:
Combination Coupling
Product Material:
Zinc plated steel

Crouse-Hinds 421 – Frequently Asked Questions

How fast can I get the Crouse-Hinds 421 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Crouse-Hinds 421 come with a warranty?
Absolutely. The Crouse-Hinds 421 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Crouse-Hinds 421?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Crouse-Hinds 421 from ZenSupply?
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