Bridgeport Fittings 370-DC 4" ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$92.26
Bridgeport Fittings 370-DC 4" Insulated Bushing, Zinc Die-Cast

Bridgeport Fittings 370-DC 4" Insulated Bushing, Zinc Die-Cast

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Model: 370-DC

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

$92.26
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Bridgeport Fittings 370-DC 4" Insulated Bushing, Zinc Die-Cast

The Bridgeport Fittings 370-DC insulated bushing is a 4" fitting built from rugged zinc die-cast material, designed to protect wire insulation from abrasion, cutting, and mechanical stress wherever conductors pass through conduit ends, box knockouts, or enclosure openings. As electrical conductors are pulled through raceway systems, sharp metal edges at conduit terminations can nick or wear through wire insulation over time, creating a potential safety hazard; the 370-DC helps address this risk with a smoothly contoured insulating surface that shields cable jackets during and after installation. Sized for 4" trade size applications, this bushing is intended for use at the point where conduit meets a box, cabinet, or enclosure, providing a secure, rounded transition for conductors. Bridgeport Fittings manufactures the 370-DC from zinc die-cast for long-term strength and corrosion resistance in demanding commercial and industrial electrical environments, making it a practical, code-conscious solution for contractors seeking dependable conductor protection at conduit terminations.

Key Features

  • Trade Size: Engineered for 4" conduit and enclosure openings, ensuring a proper fit at termination points.
  • Durable Zinc Die-Cast Construction: Zinc die-cast body delivers strength and corrosion resistance for long service life in commercial and industrial installations.
  • Insulated Bushing Design: Smooth, rounded insulating surface shields conductor insulation as wires pass through conduit ends and enclosure knockouts.
  • Conductor Protection: Helps reduce insulation abrasion, cuts, and nicks at raceway terminations that could otherwise lead to faults over time.
  • 4" Application Fit: Sized specifically for 4" conduit and box openings, providing a secure transition point for conductor runs.
  • Professional-Grade Hardware: Manufactured by Bridgeport Fittings for consistent, reliable performance across raceway and enclosure systems.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Typical Applications

  • Conduit and Raceway Systems – protects conductors at conduit terminations throughout raceway runs.
  • Panelboard, Cabinet, and Enclosure Knockouts – provides a protective transition at enclosure entry points.
  • Commercial and Industrial Electrical Installations – suited for demanding professional wiring projects.
  • Conductor Pull-Through Protection – shields wire insulation during and after cable installation.
  • New Construction and Renovation Wiring – supports both new builds and electrical upgrade projects.

Why Bridgeport Fittings?

Bridgeport Fittings engineers the 370-DC insulated bushing from zinc die-cast material to deliver long-lasting, dependable conductor protection at conduit terminations. This 4" bushing reflects Bridgeport Fittings' commitment to durable, professional-grade electrical hardware that helps contractors safeguard conductor insulation and maintain safe, reliable wiring systems. Choose the Bridgeport Fittings 370-DC for consistent zinc die-cast quality construction backed by a trusted name in electrical conduit fittings.

Manufacturer Resources

Product Specs

list_batch:
BPF-20260918
Product Type:
Conduit Bushing
Department:
Electrical
Product Subgroup:
Conduit Fittings
Product Material:
Zinc Die-Cast
Product Size:
4"
Product Group:
Conduit & Raceway

Bridgeport Fittings 370-DC – Frequently Asked Questions

1) Do I need an insulated bushing on a 4 inch conduit entering a panelboard?
That is exactly the spot the 370-DC is intended for. Where 4 inch conduit lands in a panelboard, cabinet, or enclosure knockout, the cut end and locknut edges can nick conductor insulation as the pull goes through. The bushing gives a rounded, insulated transition so the jackets clear the metal edge during and after the pull.
2) Does the 370-DC bushing replace the locknut on a 4 inch conduit termination, or do I still need one?
It does not replace the locknut. The 370-DC is a protective bushing that installs at the point where 4 inch conduit meets the box, cabinet, or enclosure to give conductors a rounded insulated transition. The connector and locknut hardware that mechanically secures the raceway to the enclosure is still needed and is ordered separately.
3) Is the 370-DC bushing metal or plastic?
Zinc die-cast body with an insulating surface at the throat where the conductors ride. That puts it between an all-plastic bushing and a bare metal one: you get the mechanical strength and corrosion resistance of the die-cast shell, plus the smooth insulated bearing surface that keeps wire jackets off sharp metal.
4) What is the Bridgeport 370-DC part number and manufacturer?
Manufacturer part number 370-DC, made by Bridgeport Fittings. The -DC suffix corresponds to the zinc die-cast version, sized 4 inch. That is the number to quote when you are matching what is already on the job.
5) Will a zinc die-cast bushing hold up in a damp industrial plant room?
Zinc die-cast is specified here for strength and corrosion resistance in commercial and industrial electrical environments, which is why the 370-DC gets used in plant and mechanical room raceway work rather than a thermoplastic-only bushing.
6) Is the 370-DC suitable for renovation work as well as new construction?
Both. The 370-DC gets used on new raceway runs and on upgrade or re-pull work where existing 4 inch conduit terminations need conductor protection added at the enclosure.
How fast can I get the Bridgeport Fittings 370-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 370-DC come with a warranty?
Absolutely. The Bridgeport Fittings 370-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 370-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
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