Octagonal Electrical Box

Industrial-Grade Metal Octagon Junction Box for Flush-Mount Wiring

Looking for a reliable, code-compliant solution for your North American electrical projects? Our 4-Inch Octagon Flush-Mount Electrical Box is the industry standard for securing ceiling and wall-mounted devices. Crafted from high-strength zinc-coated steel, this junction box safely houses wire splices, protects electrical connections from environmental damage, and meets strict local building codes.

Key Features & Benefits

Smart Beveled Corner Design: The unique 8-sided geometry allows this box to be completely covered by standard circular lighting fixtures or smoke detector bases, leaving no ugly corners exposed.

Durable Galvanized Steel Build: Stamped from heavy-gauge galvanized steel to deliver maximum impact resistance, rust prevention, and superior fireproof protection.

Multi-Size Knockouts: Equipped with multiple 1/2" and 3/4" easy-to-remove circular knockouts on both the sides and bottom, allowing flexible wire entry from any direction via EMT conduits or armored cables.

Built-in Grounding Screws: Features dedicated pre-tapped holes for grounding screws to ensure quick, safe, and reliable electrical grounding.

Primary Applications

Ceiling Light Installations: The go-to box for flush-mounting flush mounts, chandeliers, vanity lights, and wall sconces (supports standard fixtures up to 50 lbs).

Safety Device Mounting: Ideal for hardwired smoke detectors, carbon monoxide alarms, and motion sensors.

General Purpose Junction Box: Used inside drywall, plaster, or concrete ceilings as a safe transition point where multiple wire circuits meet and splice.

Specifications & Technical Details

Shape: Octagon (8-sided)

Size/Width: 4 Inches

Depth Options: Available in Standard 1-1/2" (15.5 cu. in. capacity) or Deep 2-1/8" (21.5 cu. in. capacity)

Material: Galvanized Sheet Steel

Mounting Type: Flush Mount (Concealed inside walls/ceilings)