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Utility Box Extension Ring — 6-Pack
- Mfg.#
- 665
- Sku#
- 8351363
- Features steel construction for durability in electrical installations
- Designed with six 1/2 in side knockouts and two 1/2 in end knockouts
- Suitable for use in 4 in x 2 in boxes with 1-7/8 in depth
- Features 13.0 cubic inch capacity for accommodating wiring and devices
- cULus Listed for compliance with recognized safety standards
* Estimated stock levels as of Sat, Apr 11, 2026. All items subject to prior sale. Prices may vary between stores and online. Please call ahead to confirm availability of items marked as Limited Stock.
Description
The RACO Utility Box Extension Ring is an accessory designed to extend the depth of an existing electrical box, giving installers more room to manage wiring and accommodate additional devices. You'd reach for this extension ring when remodeling or upgrading a space and need extra internal volume for new cables, connectors or deeper devices without relocating the box itself. Its straightforward design works behind the scenes to simplify troubleshooting, make splicing easier and help meet clearance needs during installations in walls or ceilings. Built to recognized safety standards, this extension ring is cULus Listed, offering reassurance that it meets established electrical listing criteria for use in compatible systems. It’s a practical, time-saving solution for electricians and DIYers tackling retrofits and upgrades.
Specifications
General
| Type | Extension Ring |
|---|
Label Information
| Certification, Codes, Standards | cULus Listed |
|---|
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