4" × 4" Square Steel Electrical Box With Raised Ground Screw
Description
The 4" × 4" Square Steel Electrical Box With Combination Knockout is designed to provide flexible conduit entry options. The combination knockouts (1/2"–3/4") allow installers to choose conduit size without additional modification, improving installation efficiency and reducing inventory complexity.

Specification
Product Name: 4" × 4" Square Steel Electrical Box With Combination Knockout
Material: Pre-Galvanized Steel / Galvanized Steel
Size: 4 inch × 4 inch
Depth: 1-1/2", 2-1/8"
Thickness: 0.8mm – 1.6mm
Knockout Type: Combination Knockout (1/2" & 3/4")
Installation Type: Surface mounted
Finish: Zinc coated
Standard: UL
OEM/ODM: Supported
| CAT# | Size | Depth | Hole Size | Knockouts | Thickness | ||
|---|---|---|---|---|---|---|---|
| Sides | Ends | Bottom | mm | ||||
| SBC2181 | 4"x4" | 2-1/8" | COM | 4xCOM | 4xCOM | 3x1/2"&2x3/4" | 0.8-1.6 |
| SBC2181 | 4"x4" | 2-1/8" | COM | 4xCOM | 4xCOM | 1x1/2"&4xCOM | 0.8-1.6 |
Application
EMT conduit systems
Commercial building wiring
Industrial electrical installations
Junction and wire splicing projects
Packing
Standard export carton
Pallet packing available
Customized packaging supported
Advantage
Integrated grounding solution
Strong galvanized steel construction
Corrosion-resistant surface
Precise stamping and smooth edges
Stable bulk production capacity
Tags
4x4 Combination KO Box, Square Electrical Box, Steel Junction Box, EMT Conduit Box, Galvanized Square Box


















