Bridgeport Fittings Three-Piece Conduit Couplings with Aluminum and Iron Body Construction
Professional threaded coupling solutions for rigid and IMC conduit connections
Bridgeport Fittings Three-Piece Conduit Couplings deliver reliable electrical conduit connections with dual-body construction options for versatile installation requirements. These professional-grade couplings feature threaded design for secure rigid and IMC conduit joining, meeting NEMA FB-1 rating standards with OSHA-recognized, NRTL-listed electrical compliance for dependable performance in electrical installations.
Professional Features & Benefits
- Dual Body Construction: Available in lightweight, corrosion-resistant aluminum or zinc-electroplated malleable iron for extended durability and application flexibility
- NEMA FB-1 Rating: Meets stringent electrical standards ensuring reliable performance and code compliance in professional installations
- Threaded Coupling Design: Provides easy, secure connections for both rigid and IMC conduits with professional-grade threading
- Impact Resistant Construction: Malleable iron option offers natural strength, rigidity, and ductility for maximum protection in demanding environments
- OSHA-Recognized Standards: All fittings meet NRTL-listed electrical standards and stringent quality requirements for professional confidence
- UL Listed: File E9391 certification ensures compliance with electrical safety standards and installation requirements
Technical Specifications
- Aluminum Body: The aluminum body is lightweight and corrosion resistant
- Department: Electrical
- Division: Electrical H1
- Easy To Use: The threaded coupling makes easy connections for rigid or IMC conduits
- Impact Resistant: The natural strength, rigidity, and ductility of malleable iron offers the highest protection from
- Iron Body: The zinc-electroplated malleable iron body provides extended resistance to corrosion
- Nema Rating: FB-1
- Professional Performance: All Bridgeport fittings meet OSHA-recognized, NRTL-listed electrical standards and the stringent bo
- Sub Division: Electrical-E H2
- Ul File: E9391
Professional Applications
- Commercial Electrical Installations
- Industrial Conduit Systems
- Residential Electrical Projects
- Institutional Facilities
- Retail and Office Buildings
- Manufacturing Facilities
- Educational Institutions
Why Choose Bridgeport Fittings Quality?
Bridgeport Fittings delivers proven reliability through OSHA-recognized, NRTL-listed electrical standards compliance and UL File E9391 certification. The NEMA FB-1 rating and dual construction options ensure long-term performance and durability in professional electrical installations, backed by stringent quality standards for dependable conduit coupling solutions.
Manufacturer Resources
Product Specs
- Aluminum Body:
- The aluminum body is lightweight and corrosion resistant
- Department:
- Electrical
- Division:
- Electrical H1
- Nema Rating:
- FB-1
- Sub Division:
- Electrical-E H2
- Certifications:
- E9391
- Product Type:
- Conduit Coupling
- Product Subgroup:
- Conduit Fittings
- Product Group:
- Conduit & Raceway
Bridgeport Fittings 1121 – Frequently Asked Questions
1) What is a three-piece conduit coupling used for, and why not just use a standard threaded coupling?
A three-piece coupling like the Bridgeport 1121 series joins two lengths of rigid or IMC conduit that are already fixed in place and cannot be rotated. A standard one-piece threaded coupling requires you to spin one conduit into it, which you can't do on an installed run. The three-piece design makes the connection without turning either conduit, so it's the fitting for repairs, tie-ins between two anchored runs, and additions to existing raceway.
2) What trade sizes do the Bridgeport three-piece couplings come in?
Malleable iron covers 1/2, 3/4, 1, 1-1/4, 1-1/2, 2 and 3 inch trade sizes (parts 1121, 1122, 1123, 1124, 1125, 1126 and 1128). Aluminum is offered in 3/4 inch (1122-AL) and 1 inch (1123-AL). If your run is larger than 1 inch, or smaller than 3/4, iron is the body you order.
3) Should I use the aluminum or the malleable iron body?
Aluminum is the lighter, corrosion-resistant choice and is a common match for aluminum rigid conduit, keeping dissimilar metals out of the joint. The zinc-electroplated malleable iron body gives added corrosion resistance plus the strength, rigidity and ductility to take impact, which is what you want in industrial and exposed locations where the raceway can get hit. Iron is also the only option below 3/4 inch and above 1 inch here.
4) Will these couplings work on EMT?
No. The Bridgeport 1121 series is a threaded coupling for rigid metal conduit and IMC, both of which are threaded. EMT is unthreaded thin-wall and needs a set-screw or compression coupling instead.
5) Are Bridgeport three-piece couplings UL listed and code compliant for a commercial inspection?
They carry UL listing under file E9391 and meet the NEMA FB-1 rating, and Bridgeport states its fittings meet OSHA-recognized, NRTL-listed electrical standards. That's the documentation an inspector or a spec writer on a commercial, institutional or industrial job is looking for.
6) Can I use a three-piece coupling to repair a damaged section in the middle of an existing rigid conduit run?
That's the main reason it exists. Cut out the damaged length, thread the two remaining ends, and the three-piece coupling closes the gap without either conduit having to be rotated or pulled out of its straps. Match the coupling trade size to the existing conduit, and pick iron for exposed or industrial runs where the raceway takes abuse.
7) Do I need to order anything else to make up the joint?
Nothing extra for the coupling itself, it ships as the three pieces that make the connection. What you do need is properly cut and threaded conduit ends on both sides, since this is a threaded fitting. Order one coupling per joint, matched to the trade size of the conduit, and check both conduits are the same size because these are straight couplings, not reducers.
How fast can I get the Bridgeport Fittings 1121 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 1121 come with a warranty?
Absolutely. The Bridgeport Fittings 1121 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 1121?
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