4" Octagon Steel Electrical Conduit Box
Description
The 4" Octagon Steel Electrical Conduit Box is designed for ceiling and wall-mounted electrical conduit installations. Manufactured from high-quality pre-galvanized steel, this octagon box provides strong mechanical protection and reliable enclosure for electrical wiring connections.
It is widely used for lighting fixture installation and conduit system connections in commercial, residential, and industrial projects. The octagonal design allows easy mounting of lighting devices while offering sufficient wiring space to meet installation requirements.

Specification
Product Name: 4" Octagon Steel Electrical Conduit Box
Material: Pre-Galvanized Steel / Galvanized Steel
Size: 4 inch Octagon
Depth: 1-1/2", 2-1/8"
Thickness: 0.8mm – 1.6mm
Knockouts: 1/2" ,3/4",1/2"&3/4"
Installation Type: Ceiling or wall mounted
Finish: Zinc coated
Standard: UL
OEM/ODM: Supported
| CAT# | Size | Depth | Hole Size | Knockouts | Thickness | ||
|---|---|---|---|---|---|---|---|
| Sides | Ends | Bottom | mm | ||||
| OB50112 | 4"x4" | 1-1/2" | 1/2" | 2x1/2" | 2x1/2" | 5x1/2" | 0.8-1.6 |
| OB75112 | 4"x4" | 1-1/2" | 3/4" | 2x3/4" | 2x3/4" | 3x1/2"&2x3/4" | 0.8-1.6 |
| OBM112 | 4"x4" | 1-1/2" | 1/2"&3/4" | 2x1/2" | 2x3/4" | 3x1/2"&2x3/4" | 0.8-1.6 |
| OB50218 | 4"x4" | 2-1/8" | 1/2" | 2x1/2" | 2x1/2" | 5x1/2" | 0.8-1.6 |
| OB75218 | 4"x4" | 2-1/8" | 3/4" | 2x3/4" | 2x3/4" | 3x1/2"&2x3/4" | 0.8-1.6 |
| OBM218 | 4"x4" | 2-1/8" | 1/2"&3/4" | 2x1/2" | 2x3/4" | 3x1/2"&2x3/4" | 0.8-1.6 |
| OB100218 | 4"x4" | 2-1/8" | 1" | 2x1" | 2x1" | 3x1/2"&2x3/4" | 0.8-1.6 |
| OBM1218 | 4"x4" | 2-1/8" | 3/4"&1" | 2x3/4" | 2x1" | 3x1/2"&2x3/4" | 0.8-1.6 |
Application
EMT conduit systems
Lighting fixture installation
Commercial building wiring
Residential electrical projects
Industrial electrical distribution systems
Packing
Standard export carton
Pallet packing available
Customized packaging supported

Advantage
Durable galvanized steel construction
Excellent corrosion resistance
Precise knockout design for easy conduit entry
Sufficient internal wiring capacity
Smooth edges for safe installation
Stable bulk production capacity
Strict quality control before shipment
Tags
4 Inch Octagon Box, Steel Octagon Electrical Box, Octagon Conduit Box, Lighting Junction Box, EMT Electrical Box, Galvanized Steel Box, Ceiling Electrical Box

















