Flush-to-Floor Round Cut-In Floor Box Kit - Brass Cover with Threaded Plugs
Meta description: Flush-to-floor round cut-in floor box kit for existing floors. Features a solid brass cover with threaded plugs. Includes tamper-resistant duplex receptacle, gasketed components, and Arlington NM94 and NM95 connectors. cULus listed.
TL;DR - Who This Is For
Electricians and contractors installing floor power into existing finished floors who want a flush, durable floor box with a classic brass finish and sealed threaded plug design.
Institutional Fit
- Office and conference room retrofits
- Residential finished floors
- Hospitality and retail interiors
- Applications requiring a flush appearance without flip lids
Technical Specifications
| Part Number |
FLB3520MB |
| Product Type |
Flush-to-floor round cut-in floor box kit |
| Trade Size |
1-gang |
| Installation Type |
Existing floor (cut-in) |
| Cover Style |
Brass cover with threaded plugs |
| Material |
Brass |
| Color / Finish |
Brass |
| Receptacle |
15A tamper-resistant duplex receptacle included |
| Weight |
0.870 lbs each |
| Dimensions |
3.995 in x 3.995 in |
| UPC-A |
018997007346 |
| Unit Packaging |
1 pc |
Regulatory Compliance
- cULus listed
Install in accordance with local electrical code requirements for floor box installations in existing floors.
Durability and Lifecycle
The solid brass cover offers long-term durability and a traditional finish suited for visible floor installations. Threaded plugs maintain a sealed, flush surface when devices are not in use, helping reduce debris ingress and maintaining a clean floor profile.
Procurement Notes
- Designed for retrofit and cut-in installations only
- Threaded plug design avoids flip lids and moving parts
- Includes receptacle and connectors to simplify installation
- Brass finish pairs well with wood, tile, and stone flooring
What’s Included
- (1) Brass cover with threaded plugs
- (2) Threaded plugs
- (1) Floor box
- (1) Gasket support plate
- (1) Gasket
- (1) 15A tamper-resistant duplex receptacle
- (1) Arlington NM95 cable connector
- (1) Arlington NM94 cable connector
- (3) #8 x 1/2 in screws
- (1) #6 x 1/2 in screw
- (3) #6 x 1-1/4 in screws
FAQ
Is this floor box suitable for new concrete pours?
No. This model is intended for cut-in installation in existing floors only.
Does the brass cover sit flush with the finished floor?
Yes. When installed correctly, the cover is flush to the floor surface.
How are unused openings sealed?
Threaded plugs seal the openings when cords are not in use.
Is a receptacle included?
Yes. A 15A tamper-resistant duplex receptacle is included in the kit.
Where can I view full specifications and drawings?
Click here for spec sheet