The Complete Guide to Metal Electrical Box Covers (4x4, Single Gang & More)

When you're installing, upgrading, or repairing electrical systems, choosing the right metal electrical box cover is essential. These covers protect wiring, support devices, and ensure code compliance. At Brand Name Lighting, your trusted online electrical supply store, we stock a full range of metal box covers in every shape, size, and configuration—including 4x4 metal electrical box covers, single gang, double gang, and weatherproof options.

In this guide, you'll learn about the different types of metal electrical box covers, their uses, configurations, materials, and how to choose the best one for your job.

 Why Choose Metal Electrical Box Covers?

Metal outlet covers are durable, fire-resistant, and perfect for heavy-duty environments. Whether you're outfitting a garage, workshop, commercial facility, or outdoor application, metal covers provide superior strength and longevity compared to plastic alternatives.

Top Benefits:

• 🔥 Fire-resistant for added safety

• 💪 Durable against impact and corrosion

• ⚡ Required for metallic conduit systems (EMT, rigid, MC)

• 🌧️ Available in weatherproof models for outdoor use

• 🧲 Provides electromagnetic shielding

 

📦 Common Types of Metal Electrical Box Covers

1. Blank Metal Box Covers

Blank plates seal off unused electrical boxes, keeping them secure and compliant.

Ideal for:

• Closing off unused junction boxes

• Covering future-use outlets or switches

• Indoor and outdoor installations

 Available in:

• Single gang blank metal covers

• Double gang blank metal plates

• 4x4 blank metal electrical box covers for 4-inch square boxes

2. Single Gang Metal Covers

Perfect for standard boxes housing one device, such as a switch or outlet.

Popular Cutouts:

• Toggle switch

• Duplex outlet

• GFCI/Decora device

• Keyhole for pass-through cables

Applications:

• Residential outlets

• Garage switches

• Commercial lighting control

3. Double Gang Metal Covers

Used for two side-by-side devices—like two switches or a switch and outlet combo.

Popular Styles:

• 2 toggles

• GFCI + toggle

• GFCI + blank

• Duplex + toggle

Use With:

• Double gang metal boxes

• 4x4 square boxes with reducer rings for dual-device installations

4. 4x4 Metal Electrical Box Covers (4-Inch Square)

A must-have for commercial and industrial installations. These covers are designed specifically for 4x4 electrical boxes, also known as 4-inch square boxes.

Popular Configurations:

• 4x4 blank cover – seals unused junction boxes

• Raised 4x4 device cover – for mounting GFCI, toggle, or duplex outlets

• 4x4 combination cover – toggle + GFCI, duplex + blank, etc.

• Weatherproof 4x4 cover – with gasket or flip lid for outdoor use

Perfect For:

• Warehouses, basements, garages

• Retrofit and surface-mounted conduit setups

• EMT and MC cable installations

5. Round Metal Box Covers

Used with octagon boxes for lighting fixtures and ceiling fan mounting.

 Options:

• Solid round blanks

• Knockout center for fixture wires

• Mounting holes for ceiling box hardware

 

6. Weatherproof Metal Covers

Designed for exterior and wet-location use. Typically made from die-cast aluminum or stainless steel.

Features:

• Flip lids or while-in-use covers

• GFCI, duplex, or toggle cutouts

• Gaskets included

Applications:

• Outdoor lighting and receptacles

• Industrial washdown areas

• Rooftop electrical enclosures

 

 Materials for Metal Electrical Covers

 

📏 How to Choose the Right Metal Electrical Cover

When ordering from Brand Name Lighting, here’s what to consider:

✅ Box Size: 4x4, single gang, double gang, or round?
✅ Device Type: Toggle, duplex, GFCI, blank, or combination
✅ Mounting Style: Flush or raised device covers
✅ Environment: Indoor or outdoor? Weatherproof needed?
✅ Code Compliance: UL-listed, commercial grade

 

🛒 Why Buy From Brand Name Lighting?

At Brand Name Lighting, we carry everything you need for electrical box finishing:

• 🔹 4x4 metal electrical box covers

• 🔹 Single gang metal plates

• 🔹 Duplex and GFCI covers

• 🔹 Stainless and galvanized options

• 🔹 Weatherproof outdoor metal covers

• 🔹 Bulk packs for contractors and pros

Enjoy fast shipping, easy ordering, and excellent customer support. Whether you're a homeowner, electrician, or facility manager, we’re here to supply your project with quality and reliability.

🔗 Shop Metal Electrical Box Covers Now

Browse our online store and find the right cover for every box:

👉 Shop Metal Covers at Brand Name Lighting

✨ Final Thoughts

A metal electrical box cover may seem like a small detail—but it’s crucial for electrical safety, performance, and a clean, code-compliant finish. From 4x4 blank metal plates to GFCI and combo device covers, Brand Name Lighting has your installation needs covered.

Whether you’re working on a rugged warehouse, outdoor power point, or residential switch, trust us to deliver the best value and selection online.