Steel City Adjustable Mud Rings
A fast, easy solution to a common rough-in problem
Now there’s a quick and economical way to ensure that stud-mounted outlet boxes fit flush with finished drywall, plaster or ceramic tile.
Steel City® adjustable mud rings have an inner ring that adjusts in depth to accommodate various drywall thicknesses.
The inner ring can be set to the anticipated depth and then easily adjusted after drywall installation.
Features and benefits
- Adjustability means that a single mud ring can replace multiple SKUs for different depths
- Available in one-gang, two-gang, three-gang and round models
- Mount to any standard 4"-square x 2-1/8" deep outlet box, such as Steel City 521711234E
- Accept industry-standard devices, including GFCIs
- Pre-galvanized steel construction
- UL listed
Applications
- Outside firewalls in hotel, casino and residential high-rise structures
- Ceramic tile walls
- Any other application in which a stud-mounted box and mud ring may require depth adjustment prior to final trim work
Easy Installation

1. Mount mud ring to steel box.
2. Move mud ring in or out using adjustment screws. No loosening or tightening required.
3. Adjustment screws remain accessible after device is in place for easing fine-tuning.
Models
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52CADJ1510 |
Single-gang, shallow, 5⁄8" to 11⁄4 adjustment depth |
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52CADJ1612 |
Single-gang, deep, 3⁄4" to 11⁄2" adjustment depth |
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52CADJ2512 |
Two-gang adjustable mud ring, 5⁄8" to 11⁄4" adjustment depth |
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52CADJ3612 |
Three-gang adjustable mud ring, 3⁄4" to 11⁄2" adjustment depth |
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54CADJ612 |
4" round adjustable mud ring, 3⁄4" to 11⁄2" adjustment depth |
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52CADJ |
Single-gang adjustable mud ring, 1⁄2” to 11⁄2” adjustment depth |