Bridgeport Fittings Mighty-Mer...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$9.20
Bridgeport Mighty-Merge® Combination Couplings

Bridgeport Fittings Mighty-Merge 3/4" Combination Coupling with Set Screw Connection

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Model: BPF-4057-4058-DC
$9.20

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

$9.20
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Bridgeport Fittings Mighty-Merge 3/4" Combination Coupling with Set Screw Connection

Professional EMT to Flexible Conduit Transition Solution

The Bridgeport Fittings Mighty-Merge combination coupling provides reliable transition connections between 3/4" EMT conduit and flexible metal conduit or AC/MC cable systems. Featuring zinc die cast construction with ball burnished finish and set screw connection technology, this coupling delivers secure electrical connections for professional electrical installations.

Professional Features & Benefits

  • 3/4" Trade Size: Accommodates standard 3/4" EMT conduit connections for versatile installation compatibility
  • Set Screw Connection: Provides secure mechanical connection between EMT and flexible conduit systems without threading requirements
  • Zinc Die Cast Construction: Naturally resistant to corrosion for long-term durability in various environmental conditions
  • Ball Burnished Finish: Professional surface treatment enhances corrosion resistance and provides smooth installation handling
  • NEMA FB-1 Rating: Meets professional electrical standards for reliable performance in commercial and industrial applications
  • Combination Design: Enables transition from rigid EMT to flexible metal conduit or AC/MC cable in a single fitting

Technical Specifications

  • Bpt Trade Size: 3/4"
  • Collection Folder: 4057-DC
  • Country Of Origin: China
  • Department: Electrical
  • Division: Electrical H1
  • Field Application: Combination Couplings used to join 3/4" EMT conduit via set screw to 14/2 through 10/3 Steel and Al
  • Nema Rating: FB-1
  • Npd Date Electrical: 2012-07-26T00:00:00.000Z
  • Product Finish: Ball Burnished
  • Product Length: 2.12 in
  • Product Material: Zinc Die Cast
  • Product Weight: 3.125 lbs
  • Product Width: 1.19 in
  • Secure Electrical Connection: Users can maintain a proper electrical connection between EMT and flexible metal conduit or AC/MC c
  • Set Screw Type: The combination transition coupling features set screw type ends to secure the connection between E
  • Sub Division: Electrical-E H2
  • Zinc Die Cast Body: The zinc die cast body is naturally resistant to corrosion for long-term use in any environment

Professional Applications

  • Commercial Building Electrical Systems
  • Industrial Facility Conduit Transitions
  • Residential Electrical Panel Connections
  • Retrofit and Renovation Projects
  • Multi-Unit Property Electrical Infrastructure
  • Professional Office Building Installations

Why Choose Bridgeport Fittings Quality?

Bridgeport Fittings delivers professional-grade electrical fittings with zinc die cast construction and NEMA FB-1 rating for reliable performance. The ball burnished finish and corrosion-resistant materials ensure long-term durability in demanding electrical applications.

Manufacturer Resources

Product Specs

Bpt Trade Size:
3/4"
Country Of Origin:
China
Department:
Electrical
Division:
Electrical H1
Nema Rating:
FB-1
Product Finish:
Ball Burnished
Product Length:
2.12 in
Product Material:
Zinc Die Cast
Product Weight:
3.125 lbs
Product Width:
1.19 in
Sub Division:
Electrical-E H2

Bridgeport Fittings BPF-4057-4058-DC – Frequently Asked Questions

1) Will a Bridgeport 4057-DC combination coupling connect 3/4 inch EMT to flexible metal conduit without threading?
That's exactly what the Mighty-Merge 4057-DC does. It joins 3/4 inch EMT to flexible metal conduit or AC/MC cable in one fitting, and both ends are set screw type, so nothing gets threaded or reamed. You cut the EMT, slide it in, tighten the screws. The EMT side is 3/4 inch trade size and the flex side takes 3/8 inch.
2) What size AC/MC cable does the Bridgeport Mighty-Merge 4057-DC accept on the flex end?
The flex end is sized for 3/8 inch flex and covers 14/2 through 10/3 steel and aluminum armored cable. If you're running 12/2 MC off a 3/4 inch EMT stub to a light or a disconnect, you're inside that range. Anything heavier than 10/3 needs a different fitting.
3) Is the Bridgeport 4057-DC coupling suitable for a damp or corrosive location?
The body is zinc die cast with a ball burnished finish, which Bridgeport describes as naturally corrosion resistant for long term use in any environment. That covers ordinary damp and dusty commercial and industrial spaces. It is not a raintight or concrete tight fitting, so treat it as a dry and damp location transition rather than a wet location or direct burial one.
4) Does the Bridgeport Mighty-Merge combination coupling meet NEMA FB-1?
NEMA FB-1 is the stated rating on the 4057-DC. That is the fittings and boxes standard specifying engineers write into commercial and institutional electrical submittals, so it will satisfy a spec calling for FB-1 compliant fittings on an EMT to flex transition.
5) How much room do I need to fit a 3/4 inch EMT to flex combination coupling in a tight ceiling?
Plan on roughly 2.12 inches of length and 1.19 inches across for the 4057-DC. That is the whole fitting, so between a strap and a whip drop you need a bit over two inches of straight EMT clear. In a congested plenum, set your last strap back accordingly.
6) Can I use a combination coupling instead of a separate EMT connector and flex connector into a box?
Yes, and that is the point of it. A combination coupling makes the EMT to flex transition mid run, so you don't have to land both raceways in a junction box just to change methods. Use it where a hard piped 3/4 inch EMT run needs to finish as a flexible whip to a motor, light fixture, or vibrating equipment. If the transition has to happen at an enclosure anyway, two separate connectors into that box is the normal approach.
7) What is the manufacturer part number for the Bridgeport 3/4 inch EMT to 3/8 inch flex combination coupling?
Order it as Bridgeport Fittings 4057-DC. That is the 3/4 inch EMT set screw to 3/8 inch flex combination coupling in the Mighty-Merge line. One part number covers the whole configuration, there is no separate finish or option code to specify.
How fast can I get the Bridgeport Fittings BPF-4057-4058-DC 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 BPF-4057-4058-DC come with a warranty?
Absolutely. The Bridgeport Fittings BPF-4057-4058-DC 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 BPF-4057-4058-DC?
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 BPF-4057-4058-DC from ZenSupply?
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