Crouse-Hinds EMT to Rigid Cond...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$3.99
$3.97
Eaton Crouse-Hinds EMT Combination Coupling - EMT (Set Screw) to Rigid (Set Screw)

Crouse-Hinds EMT to Rigid Conduit Combination Coupling - Set Screw Connection System

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Model: 421

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

$3.99
$3.97
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Crouse-Hinds EMT to Rigid Conduit Combination Coupling

Professional Set Screw Connection System for Mixed Conduit Applications

The Crouse-Hinds EMT to Rigid Conduit Combination Coupling provides reliable connection between EMT and rigid conduit systems using set screw technology. This zinc plated steel coupling delivers professional-grade performance for ordinary/non-hazardous locations, featuring compact 3-inch length design with dual set screw connections for secure conduit joining.

Professional Features & Benefits

  • EMT to Rigid Connection: Enables seamless transition between different conduit types in a single coupling for versatile installation flexibility.
  • Set Screw Design: Dual set screw connections provide secure, reliable attachment to both EMT and rigid conduit without threading requirements.
  • Zinc Plated Steel Construction: Corrosion-resistant finish ensures long-term durability and maintains connection integrity in demanding environments.
  • Compact 3-Inch Profile: Space-efficient design minimizes installation footprint while providing full structural connection capability.
  • NEC/CEC Compliant: Meets National Electrical Code and Canadian Electrical Code standards for professional electrical installations.
  • Ordinary Location Rating: Approved for standard commercial and residential applications in non-hazardous environments.

Technical Specifications

  • Area Classification: Ordinary/Non-Hazardous Locations
  • Combination Type: EMT (set screw) to rigid (set screw)
  • Conduit Type: EMT
  • Product Details: Combination
  • Product Height: 1.5 IN
  • Product Length: 3 IN
  • Product Length Depth: 2.81 in
  • Product Material: Zinc plated steel
  • Product Style: Combination
  • Product Weight: .37 LB
  • Product Width: 1.5 IN
  • Standards Type: NEC/CEC

Professional Applications

  • Commercial Building Electrical Systems
  • Industrial Facility Conduit Transitions
  • Residential Electrical Installations
  • Retrofit and Upgrade Projects
  • Mixed Conduit System Integration
  • Professional Electrical Contracting

Why Choose Crouse-Hinds Quality?

Crouse-Hinds combination couplings deliver proven reliability through zinc plated steel construction and NEC/CEC compliance. The precision-engineered set screw design ensures secure connections while the compact profile facilitates professional installation in space-constrained applications.

Manufacturer Resources

Product Specs

Area Classification:
Ordinary/Non-Hazardous Locations
Combination Type:
EMT (set screw) to rigid (set screw)
Conduit Type:
EMT
Product Details:
Combination
Product Height:
1.5 IN
Product Length:
3 IN
Product Length Depth:
2.81 in
Product Material:
Zinc plated steel
Product Style:
Combination
Product Weight:
.37 LB
Product Width:
1.5 IN
Standards Type:
NEC/CEC
Product Depth:
0.63 in
Product Grips:
Plastisol
Department:
Electrical
Product Type:
Conduit Fittings

Crouse-Hinds 421 – Frequently Asked Questions

1) Can I connect EMT to rigid conduit without threading the rigid?
That's exactly what the Crouse-Hinds combination coupling does. One end takes EMT on set screws, the other end takes rigid on set screws, so neither side needs a threaded joint or a running thread cut in the field. It's a straight mechanical transition between the two raceway types in a single fitting.
2) What trade sizes does the Crouse-Hinds EMT to rigid combination coupling come in?
Two sizes, and both are same-to-same: 3/4 inch EMT to 3/4 inch rigid (part 421), and 1 inch EMT to 1 inch rigid (part 422). There is no reducing version, so match the coupling to the trade size of the run you are transitioning.
3) Is this combination coupling approved for a hazardous or classified area?
No. The zinc plated steel combination coupling is rated for ordinary, non-hazardous locations only. If your run passes through a Class I or Class II classified area, you need a fitting listed for that classification instead.
4) Will a set screw EMT coupling hold up outdoors or in a wet location?
Set screw fittings are a dry-location design, and this one is zinc plated steel finished for corrosion resistance in ordinary locations. For a wet or damp run you want a raintight compression-style connection instead. Zinc plating handles ambient moisture and general commercial environments, not direct water exposure.
5) How much room do I need to fit this coupling in a tight ceiling or wall cavity?
The body runs 3 inches long and 1.5 inches in both height and width, so budget a 3 inch straight section clear of obstructions plus screwdriver access to the set screws on each end. Weight is .37 lb, light enough that it needs no separate support beyond the normal strapping either side of the joint.
6) Does this coupling meet code for a commercial electrical inspection?
The combination coupling is built to NEC/CEC standards, which covers both US and Canadian jobs. It is a non-hazardous location fitting, so it satisfies inspection on ordinary commercial, industrial, and residential raceway work, but not on anything requiring a classified-area listing.
7) Do I need a set screw or a compression coupling to tie EMT into an existing rigid run?
For a dry indoor transition, the set screw combination coupling is the faster call: no threads to cut on the rigid, no compression rings to seat, just tighten the screws on each end. Choose compression instead when the location is damp or the joint needs to be pulled apart and reused. Both ends here are set screw, so the whole joint is one tool and one operation.
8) Is this steel or die cast zinc? I need steel fittings on the spec.
Steel, with a zinc plating over it, not a zinc die cast body. If your drawing calls for steel set screw fittings on the EMT to rigid transitions, the 421 and 422 meet that.
9) Can I use this to bond the conduit run for equipment grounding?
Steel construction with set screws on both ends gives a metal-to-metal path through the fitting, which is how a steel raceway system carries continuity. Where the raceway itself is being relied on, that path has to be tight and continuous, so torque both set screws fully. If your job spec calls for a separate equipment grounding conductor pulled in the raceway, this fitting does not change that requirement.
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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