Bridgeport Fittings 3/4" Combi...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$21.91
Bridgeport Fittings 3/4" Combination Coupling Rigid/IMC to EMT Steel with Zinc Electroplate Finish

Bridgeport Fittings 3/4" Combination Coupling Rigid/IMC to EMT Steel with Zinc Electroplate Finish

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Model: 291-MS
$21.91

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

$21.91
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Bridgeport Fittings 3/4" Combination Coupling Rigid/IMC to EMT Steel with Zinc Electroplate Finish

Professional conduit connection solution for versatile electrical installations

Bridgeport Fittings delivers reliable conduit connection performance with this 3/4" combination coupling designed for joining rigid or IMC conduit to EMT. Featuring zinc electroplated steel construction and NEMA FB-1 rating, this coupling provides concrete-tight sealing and corrosion resistance for professional electrical installations.

Professional Features & Benefits

  • 3/4" Trade Size: Standard sizing ensures compatibility with common conduit systems for versatile installation applications.
  • Zinc Electroplate Finish: Provides rust and corrosion resistance for long-lasting performance in demanding environments.
  • Steel Construction: Durable material delivers reliable mechanical strength and structural integrity for professional installations.
  • NEMA FB-1 Rating: Meets recognized electrical standards for safe and compliant conduit connections.
  • Threaded Design: Internal threading for rigid/IMC connections enables easy installation and secure conduit joining.
  • Concrete-Tight Seal: Creates reliable sealing performance to prevent moisture and debris infiltration.
  • Compression Connection: Secure EMT connection method ensures proper conduit retention and electrical continuity.

Technical Specifications

  • Bpt Trade Size: 3/4"
  • Collection Folder: 291-MS
  • Country Of Origin: China
  • Department: Electrical
  • Division: Electrical H1
  • Easy To Use: The threaded coupling makes easy connections for rigid, IMC, or EMT conduit
  • Field Application: Used to join lengths of rigid or IMC to EMT. Coupling internally threaded for rigid / IMC. Compress
  • Nema Rating: FB-1
  • Npd Date Electrical: 2008-07-02T00:00:00.000Z
  • Product Finish: Zinc electro-plate
  • Product Length: 1.53125 in
  • Product Material: Steel
  • Product Weight: 4.55 lbs
  • Product Width: 1.375 in
  • Professional Performance: All Bridgeport fittings meet OSHA-recognized, NRTL-listed electrical standards and the stringent bo
  • Steel Body: The zinc-electroplated steel is rust and corrosion resistant
  • Sub Division: Electrical-E H2
  • Tight Seal: The Bridgeport coupling creates a concrete-tight seal

Professional Applications

  • Commercial electrical installations requiring conduit transitions
  • Industrial facilities with mixed conduit systems
  • Residential electrical projects with rigid to EMT connections
  • Maintenance and retrofit applications
  • Underground and concrete pour installations
  • Multi-unit properties with diverse conduit requirements

Why Choose Bridgeport Fittings Quality?

Bridgeport Fittings delivers professional-grade electrical fittings that meet OSHA-recognized, NRTL-listed electrical standards. The zinc electroplated steel construction and NEMA FB-1 rating ensure reliable performance and corrosion resistance for long-term electrical system integrity.

Manufacturer Resources

Product Specs

Bpt Trade Size:
3/4"
Department:
Electrical
Division:
Electrical H1
Nema Rating:
FB-1
Product Finish:
Zinc electro-plate
Product Length:
1.53125 in
Product Material:
Steel
Product Weight:
4.55 lbs
Product Width:
1.375 in
Steel Body:
The zinc-electroplated steel is rust and corrosion resistant
Sub Division:
Electrical-E H2
Tight Seal:
The Bridgeport coupling creates a concrete-tight seal
Product Type:
Conduit Coupling
Product Subgroup:
Conduit Fittings
Product Group:
Conduit & Raceway

Bridgeport Fittings 291-MS – Frequently Asked Questions

1) How do I connect 3/4 inch rigid conduit to 3/4 inch EMT?
Use a combination coupling like the Bridgeport 291-MS. One end is internally threaded to take the threads on 3/4 inch rigid or IMC; the other end is a compression connection that grips 3/4 inch EMT. Thread the rigid in, slide the EMT into the compression end and tighten the gland nut. No die work on the EMT, no separate adapter needed.
2) Is the Bridgeport 291-MS combination coupling OK to pour in concrete?
Yes. The 291-MS makes a concrete-tight seal, so it can be used in a slab pour or other concrete-encased run. Concrete-tight is not the same as raintight or wet location rated, so do not treat it as a substitute for a raintight compression fitting where water exposure is the concern.
3) Will this coupling work on 1/2 inch or 1 inch conduit?
No. The 291-MS is a single-size fitting, 3/4 inch on the rigid/IMC threaded side and 3/4 inch on the EMT compression side. It is not a reducing coupling. If you are stepping between trade sizes you need a different combination fitting sized for each end.
4) What standard does this Bridgeport combination coupling meet?
It carries a NEMA FB-1 rating, the fittings standard for boxes and conduit fittings, and Bridgeport builds to OSHA-recognized, NRTL-listed electrical standards. That is what an inspector looks for on a conduit transition in commercial work.
5) Will a zinc plated steel coupling hold up in a damp or outdoor location?
The body is steel with a zinc electro-plate finish for rust and corrosion resistance, which suits it to typical commercial and industrial exposure and to concrete pours. For continuously wet, chemical, or coastal service, a zinc plate is a general-duty finish rather than a corrosion-service one, so spec accordingly.
6) Does the EMT side of this coupling need a set screw or is it compression?
Compression. The EMT end uses a compression gland and nut, not a set screw, so it grips the tube all the way around and is the type used where a concrete-tight joint is required. Set screw fittings are the dry-location-only alternative.
7) Can I use this to join rigid to rigid, or IMC to IMC?
No. The 291-MS is a transition fitting: threaded on one end for rigid or IMC, compression on the other for EMT. Joining rigid to rigid calls for a standard threaded rigid coupling or an Erickson-style three-piece coupling where neither length can turn.
8) How much space does the Bridgeport 291-MS coupling take up in a run?
The fitting measures 1.53125 in by 1.375 in. That matters when you are transitioning inside a stud bay, close to a box, or in a tight rack of parallel runs, since the compression nut is the widest point and needs wrench clearance.
9) Is the 4.55 lbs weight for one coupling or a box?
The 4.55 lbs figure is the catalog product weight for the 291-MS. A single 3/4 inch steel combination coupling is a hand-sized part, so treat that number as the packaged quantity weight when you are working out freight rather than the weight of one fitting in your hand.
How fast can I get the Bridgeport Fittings 291-MS 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 Bridgeport Fittings 291-MS come with a warranty?
Absolutely. The Bridgeport Fittings 291-MS 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 Bridgeport Fittings 291-MS?
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 Bridgeport Fittings 291-MS from ZenSupply?
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