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Bell 5374-0 4 in. Round Blank Cover, Box Mount, Steel
The Bell 5374-0 is a 4 in. round blank cover engineered for box-mount installations where an unused round electrical box needs a clean, code-ready closure. Built from steel with a gray finish and a low-profile 0.25 in. depth, this blank/flat cover seals the box opening flush without interrupting the surrounding wall or ceiling line. It is UL Listed and CSA Certified, making it a dependable choice for residential and commercial electrical work that demands durable, standards-compliant components.
Key Features
- Trade Size: Sized for 4 in. round electrical boxes, matching standard box-mount round enclosures.
- Durable Construction: Steel construction with a gray finish delivers metallic strength and long-term durability in demanding electrical environments.
- Blank/Flat Cover Type: Solid blank cover design with no cutouts, used to fully close off an unused round box opening.
- Low-Profile Depth: 0.25 in. depth keeps the cover close to the mounting surface for a neat, finished appearance.
- Box Mount Installation: Designed for direct box-mount application on round electrical boxes for a secure, stable fit.
- Round Box Type: Matches round box geometry for proper alignment and coverage.
Certifications & Compliance
- UL Listed
- CSA Certified
Technical Specifications
- Product Material: Steel
- Product Color: Gray
- Product Depth: 0.25 in
- Construction: Metallic
- Box Type: Round
- Cover Type: Blank/Flat
- Certified Listed: UL Listed, CSA Certified
- PDF: Spec Sheet: https://hubbellcdn.com/specsheet/BELL-53740-SPEC-EN.pdf
Typical Applications
- Capping Unused Round Electrical Boxes
- Residential and Commercial Wall or Ceiling Installations
- Electrical Renovation and Remodel Projects
- Box-Mount Round Enclosure Closures
- New Construction Electrical Rough-In
Why Bell?
Bell builds this 4 in. round blank cover from steel for reliable, long-lasting performance, and the UL Listed and CSA Certified ratings confirm it meets recognized safety standards for professional electrical installations. The low-profile 0.25 in. depth and box-mount fit make it a straightforward, code-compliant solution for closing off round boxes cleanly.
Manufacturer Resources
Spec Sheet
Product Specs
- list_batch:
- BELL-20260916
- Product Material:
- Steel
- Product Color:
- Gray
- Product Depth:
- 0.25 in
- Construction:
- Metallic
- Box Type:
- Round
- Cover Type:
- Blank/Flat
- Product Type:
- Weatherproof Blank Cover
- Certified Listed:
- UL Listed
- Certified Listed:
- CSA Certified
- Department:
- Electrical
- Product Subgroup:
- Weatherproof Covers
- Product Group:
- Wiring Devices
Bell 5374-0 – Frequently Asked Questions
1) Will the Bell 5374-0 cover fit a 4 inch round electrical box?
Yes. The Bell 5374-0 is a 4 inch round blank cover made to sit directly on standard 4 inch round box-mount enclosures, matching the round box geometry so the opening is fully closed and the mounting ears line up.
2) Can I use a blank round cover to close off an abandoned junction box in a finished ceiling?
That is exactly what the Bell 5374-0 does. It is a solid blank/flat cover with no device cutouts, so it caps an unused round box and keeps the splices inside accessible but enclosed. At 0.25 in deep it sits close to the surface rather than standing proud of the ceiling line. Note that code requires the box to stay accessible, so don't bury it behind drywall.
3) Is the Bell 5374-0 a weatherproof cover for outdoor use?
No. The 5374-0 is a flat steel blank cover for box-mount round boxes, not a gasketed weatherproof closure. For a wet or damp location you want a weatherproof round cover with a gasket rated for that use.
4) What cover should I use to close off a 3-gang switch box instead of the Bell 5374-0?
The Bell 5374-0 is a round blank/flat cover sized for round electrical boxes, so it will not span a rectangular gang box. For a 3-gang opening, use the Thomas & Betts 3-GCS Steel City flat 3-gang switch box cover, which is built for that box geometry in pre-galvanized steel. Match the cover to the box shape and gang count first, then the material.
5) Is the Thomas & Betts 3-GCS a substitute for the Bell 5374-0 round blank cover?
No. Both are flat steel box covers, but the Thomas & Betts 3-GCS is a 3-gang switch box cover with device openings, while the Bell 5374-0 is a solid blank with no cutouts for a 4 in. round box. The Bell unit is what you want when the box is being capped and nothing is being mounted in it.
6) Is this round box cover metal or plastic?
Steel, with a gray finish, and it is classed as metallic construction. That matters on a metal box, because a metallic cover on a metallic box keeps the equipment grounding path continuous through the cover screws.
7) Does the Bell 5374-0 come with mounting screws?
Order the 5374-0 as the cover itself, model 5374-0. On a standard round box the cover fastens with the box's own 8-32 cover screws, which are normally supplied in the box; if you are covering an older box with missing hardware, pick up 8-32 machine screws separately.
8) How much does a blank round cover add to the wall surface?
Just a quarter inch. The 5374-0 has a 0.25 in depth, so it stays tight to the mounting surface and won't interfere with trim, tile, or a ceiling line.
9) How do the finishes compare between the Bell 5374-0 and the Steel City 3-GCS cover?
The Bell 5374-0 is steel with a gray finish; the Thomas & Betts 3-GCS Steel City cover is pre-galvanized steel. Both are metallic covers, so the choice usually comes down to which finish matches the other plates already on the run.
How fast can I get the Bell 5374-0 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 Bell 5374-0 come with a warranty?
Absolutely. The Bell 5374-0 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 Bell 5374-0?
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selection,
installation tips, and troubleshooting. Contact Us
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