Bridgeport Fittings Plastic Bushings 105°C Temperature Rated Grey Electrical Conduit Termination
Professional conduit termination solution for electrical installations
Bridgeport Fittings Plastic Bushings deliver reliable conduit termination performance with 105°C temperature rating for professional electrical applications. These grey plastic bushings provide cost-effective, maintenance-free construction that resists corrosion and chemicals while meeting NEMA FB-1 standards for dependable service in demanding environments.
Professional Features & Benefits
- 105°C Temperature Rating: Engineered for high-temperature professional environments ensuring reliable performance under demanding thermal conditions
- Corrosion & Chemical Resistant Construction: Plain plastic body provides long-lasting durability and maintenance-free operation in harsh electrical environments
- NEMA FB-1 Rating: Meets professional electrical standards for consistent performance and code compliance in commercial installations
- Cost-Effective Design: Plain plastic construction delivers professional performance while maintaining budget-friendly installation costs
- NRTL Listed Performance: All Bridgeport fittings meet OSHA-recognized electrical standards ensuring professional-grade reliability and safety
- Versatile Application: Compatible with locknut for rigid and IMC conduit termination or with connector for damage prevention
Technical Specifications
- Cost Effective Construction: The plain plastic body is maintenance-free, cost-effective and resistant to corrosion and chemicals
- Country Of Origin: United States
- Department: Electrical
- Division: Electrical H1
- Field Application: Used with locknut to terminate threaded rigid and IMC to box, or used with connector to prevent dam
- Heat Rating: The bushing is temperature rated to 105°C for use in professional environments
- Nema Rating: FB-1
- Product Color: Grey
- Product Finish: Plain
- Product Material: Plastic
- Professional Performance: All Bridgeport fittings meet OSHA-recognized, NRTL-listed electrical standards and meet the stringe
- Sub Division: Electrical-E H2
- Ul File: E9391
Professional Applications
- Commercial Electrical Installations
- Industrial Conduit Systems
- Professional Office Buildings
- Retail Electrical Infrastructure
- Multi-Unit Residential Properties
- Educational Facilities
- Healthcare Electrical Systems
Why Choose Bridgeport Fittings Quality?
Bridgeport Fittings delivers professional-grade electrical components with NRTL-listed performance and OSHA-recognized standards compliance. The plain plastic construction with 105°C temperature rating and NEMA FB-1 certification ensures reliable, maintenance-free operation in demanding professional environments while providing cost-effective installation solutions.
Manufacturer Resources
Product Specs
- Country Of Origin:
- United States
- Department:
- Electrical
- Division:
- Electrical H1
- Nema Rating:
- FB-1
- Product Color:
- Grey
- Product Finish:
- Plain
- Product Material:
- Plastic
- Sub Division:
- Electrical-E H2
- Certifications:
- E9391
- Product Type:
- Conduit Bushing
- Product Subgroup:
- Conduit Fittings
- Product Group:
- Conduit & Raceway
Bridgeport Fittings BF-321 – Frequently Asked Questions
1) What size Bridgeport plastic bushings are available for rigid and IMC conduit?
Bridgeport's grey plastic bushings run the full trade size range, twelve sizes from 1/2 inch up through 6 inch: 1/2 (321), 3/4 (322), 1 (323), 1-1/4 (324), 1-1/2 (325), 2 (326), 2-1/2 (327), 3 (328), 3-1/2 (329), 4 (330), 5 (331) and 6 inch (332). Order by the trade size of the conduit you are terminating, not by the knockout in the box.
2) Can I use a plastic insulating bushing on conductors rated 90 degrees C or higher?
The Bridgeport plastic bushing is temperature rated to 105 degrees C, so it sits above the 90 degree C conductor insulation used on most commercial branch and feeder runs. That rating is the reason inspectors care about which bushing went on the raceway, and it is the spec to quote if the job calls for a high temperature rated insulating throat.
3) Do I need a locknut with these bushings, or is one included?
You supply the locknut. The bushing threads onto the conduit end and is used with a locknut to terminate threaded rigid or IMC to the box, so order a locknut in the matching trade size for every termination. Where you are landing a connector instead of threaded conduit, the bushing goes on to protect the conductors as they enter and no locknut is involved.
4) Will a plastic bushing thread onto EMT, or is it only for rigid and IMC?
These are threaded bushings for threaded raceway. The stated application is terminating threaded rigid and IMC to a box with a locknut. EMT is not threaded, so on an EMT run the bushing goes on the threaded hub of the EMT connector rather than on the tubing itself.
5) Are Bridgeport plastic bushings UL listed for a commercial inspection?
Yes, they fall under UL file E9391, and Bridgeport fittings are NRTL listed to OSHA recognized electrical standards. The bushings also carry the NEMA FB-1 rating, which is the fittings standard a specifier writes into a commercial or institutional electrical spec.
6) Plastic bushing or metallic insulated bushing, which one should I be ordering?
Go plastic where the bushing's only job is protecting conductor insulation at the raceway opening. The plastic body is maintenance free, resists corrosion and chemicals, and costs less than a metallic body. Where the design needs the bushing to carry a bond, plastic will not do it and you want a metallic grounding bushing with a lay in lug instead. Note the metal parts of the raceway still handle continuity; the plastic bushing is strictly an insulating throat.
7) Will these bushings hold up in a wet or corrosive area like a parking garage or a plant?
Corrosion is where plastic earns its place. The plain plastic body resists corrosion and chemicals and needs no maintenance, so it will not rust out at the box entry the way a bare steel part can. The body is grey, and the rating to hold onto for a hot mechanical or boiler room is the 105 degree C temperature rating.
8) Are Bridgeport conduit bushings made in the USA for a Buy American job?
Country of origin on the Bridgeport plastic bushings is the United States. That is the line to cite on federal, state and institutional work carrying a domestic sourcing requirement.
9) I am standardizing conduit terminations across a portfolio of buildings. Can one bushing type cover every raceway size?
One part family covers 1/2 inch through 6 inch across twelve trade sizes, same grey plastic body, same 105 degree C rating and same FB-1 compliance at every size. For a property manager or MRO stockroom that means a single line item stocked in the sizes your buildings actually run, with no mixed ratings to track between the small branch circuits and the large feeders.
How fast can I get the Bridgeport Fittings BF-321 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
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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 BF-321 come with a warranty?
Absolutely. The Bridgeport Fittings BF-321 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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