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Steel Baseplates

Steel Baseplates

Build with confidence using USA-made hot-rolled Steel Baseplates from OnlineMetals. Engineered for strength and versatility, these durable plates provide a solid foundation for posts, columns, and equipment across industrial and fabrication projects. They come in custom-cut square sizes from 3" x 3" to 8" x 8" (1/8" to 1/2" thickness) and feature pre-drilled corner holes for easy mounting to metal, brick, or concrete without excavation. Perfect for structural reinforcement, sign installations, or fireboxes, they deliver the rugged flatness needed for indoor and outdoor environments.

16 Results

0.50" Carbon Steel Baseplate A36 w/ Four 0.5625" Corner Holes Plasma Cut Part # mp-00041932

0.50" Carbon Steel Baseplate A36 w/ Four 0.5625" Corner Holes Plasma Cut -
Part #: mp-00041932
Sold & Shipped by All Metals Inc
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$17.00 for 1
$17.00 ea.
Camera Expand Details
quantity discount
Qty
Price ea.
Savings
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Dimensions

  • Thickness: 0.5"
  • Opening Size: 0.5625"
  • Number of Holes: 4 Holes
View more product details Click for more details

Key Features

CUSTOM CUT USA U.S.A.Made DFARS Compliant MTR MTR NOT AVAILABLE product return Non-returnable
View more product details View more product details
View more product details Click for more details

12" Carbon Steel Matte Black Powder Coated Baseplate Part # mp-00040483

12" Carbon Steel Matte Black Powder Coated Baseplate -
Part #: mp-00040483
Sold & Shipped by EZTube

Each of 1

Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$18.00
$18.00 ea.
Camera Expand Details

Dimensions

  • Color: Matte Black
  • Height: 12"
  • Connection Type: Requires Connector
View more product details Click for more details

Key Features

CUSTOM CUT USA U.S.A.Made DFARS Compliant MTR MTR AVAILABLE product return Returns Acceptable.
View more product details View more product details
View more product details Click for more details

0.25" Carbon Steel Baseplate A36 w/ Four 0.5625" Corner Holes Plasma Cut Part # mp-00041933

0.25" Carbon Steel Baseplate A36 w/ Four 0.5625" Corner Holes Plasma Cut -
Part #: mp-00041933
Sold & Shipped by All Metals Inc
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$12.75 for 1
$12.75 ea.
Camera Expand Details
quantity discount
Qty
Price ea.
Savings
More
Less

Dimensions

  • Thickness: 0.25"
  • Opening Size: 0.5625"
  • Number of Holes: 4 Holes
View more product details Click for more details

Key Features

CUSTOM CUT USA U.S.A.Made DFARS Compliant MTR MTR NOT AVAILABLE product return Non-returnable
View more product details View more product details
View more product details Click for more details

6" x 6" Heavy Duty Steel Baseplate w/ Four 1/2" Corner Holes Part # mp-00061772

6" x 6" Heavy Duty Steel Baseplate w/ Four 1/2" Corner Holes -
Part #: mp-00061772
Sold & Shipped by Bobco Metals
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$12.99 for 1
$12.99 ea.
Camera Expand Details

Dimensions

  • Thickness: 0.1875"
  • Opening Size: 0.5"
  • Number of Holes: 4 Holes
View more product details Click for more details

Key Features

CUSTOM CUT DFARS Compliant MTR MTR NOT AVAILABLE product return Returns Acceptable.
View more product details View more product details
View more product details Click for more details

8" x 8" Heavy Duty Steel Baseplate w/ Four 5/8" Corner Holes Part # mp-00061771

8" x 8" Heavy Duty Steel Baseplate w/ Four 5/8" Corner Holes -
Part #: mp-00061771
Sold & Shipped by Bobco Metals
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$21.99 for 1
$21.99 ea.
Camera Expand Details

Dimensions

  • Thickness: 0.3125"
  • Opening Size: 0.625"
  • Number of Holes: 4 Holes
View more product details Click for more details

Key Features

CUSTOM CUT DFARS Compliant MTR MTR NOT AVAILABLE product return Returns Acceptable.
View more product details View more product details
View more product details Click for more details

0.125" Heavy Duty Steel Baseplate w/ Four 3/8" Corner Holes Part # mp-00061775

0.125" Heavy Duty Steel Baseplate w/ Four 3/8" Corner Holes -
Part #: mp-00061775
Sold & Shipped by Bobco Metals
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$5.99 for 1
$5.99 ea.
Camera Expand Details

Dimensions

  • Thickness: 0.125"
  • Opening Size: 0.375"
  • Number of Holes: 4"
View more product details Click for more details

Key Features

CUSTOM CUT DFARS Compliant MTR MTR NOT AVAILABLE product return Returns Acceptable.
View more product details View more product details
View more product details Click for more details

3" x 3" Heavy Duty Steel Baseplate w/ Four 3/8" Corner Holes Part # mp-00061774

3" x 3" Heavy Duty Steel Baseplate w/ Four 3/8" Corner Holes -
Part #: mp-00061774
Sold & Shipped by Bobco Metals
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$4.99 for 1
$4.99 ea.
Camera Expand Details

Dimensions

  • Thickness: 0.125"
  • Opening Size: 0.375"
  • Number of Holes: 4 Holes
View more product details Click for more details

Key Features

CUSTOM CUT DFARS Compliant MTR MTR NOT AVAILABLE product return Returns Acceptable.
View more product details View more product details
View more product details Click for more details

5" x 5" Heavy Duty Steel Baseplate w/ Four 1/2" Corner Holes Part # mp-00061773

5" x 5" Heavy Duty Steel Baseplate w/ Four 1/2" Corner Holes -
Part #: mp-00061773
Sold & Shipped by Bobco Metals
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$8.99 for 1
$8.99 ea.
Camera Expand Details

Dimensions

  • Thickness: 0.1875"
  • Opening Size: 0.5"
  • Number of Holes: 4 Holes
View more product details Click for more details

Key Features

CUSTOM CUT DFARS Compliant MTR MTR NOT AVAILABLE product return Returns Acceptable.
View more product details View more product details
View more product details Click for more details

3" Carbon Steel Matte Black Powder Coated Baseplate Part # mp-00040489

3" Carbon Steel Matte Black Powder Coated Baseplate -
Part #: mp-00040489
Sold & Shipped by EZTube

Each of 1

Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$15.00
$15.00 ea.
Camera Expand Details

Dimensions

  • Color: Matte Black
  • Height: 3"
  • Connection Type: Requires Connector
View more product details Click for more details

Key Features

CUSTOM CUT USA U.S.A.Made DFARS Compliant MTR MTR AVAILABLE product return Returns Acceptable.
View more product details View more product details
View more product details Click for more details

3" Carbon Steel Semi-Gloss Gray Powder Coated Baseplate Part # mp-00040484

3" Carbon Steel Semi-Gloss Gray Powder Coated Baseplate -
Part #: mp-00040484
Sold & Shipped by EZTube

Each of 1

Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$15.00
$15.00 ea.
Camera Expand Details

Dimensions

  • Color: Semi-gloss Gray
  • Height: 3"
  • Connection Type: Requires Connector
View more product details Click for more details

Key Features

CUSTOM CUT USA U.S.A.Made DFARS Compliant MTR MTR AVAILABLE product return Returns Acceptable.
View more product details View more product details
View more product details Click for more details

3" Carbon Steel Gloss White Powder Coated Baseplate Part # mp-00040472

3" Carbon Steel Gloss White Powder Coated Baseplate -
Part #: mp-00040472
Sold & Shipped by EZTube

Each of 1

Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$15.00
$15.00 ea.
Camera Expand Details

Dimensions

  • Color: Gloss White
  • Height: 3"
  • Connection Type: Requires Connector
View more product details Click for more details

Key Features

CUSTOM CUT USA U.S.A.Made DFARS Compliant MTR MTR AVAILABLE product return Returns Acceptable.
View more product details View more product details
View more product details Click for more details

6" Carbon Steel Gloss White Powder Coated Baseplate Part # mp-00040521

6" Carbon Steel Gloss White Powder Coated Baseplate -
Part #: mp-00040521
Sold & Shipped by EZTube

Each of 1

Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$18.00
$18.00 ea.
Camera Expand Details

Dimensions

  • Color: Gloss White
  • Height: 6"
  • Connection Type: Requires Connector
View more product details Click for more details

Key Features

CUSTOM CUT USA U.S.A.Made DFARS Compliant MTR MTR AVAILABLE product return Returns Acceptable.
View more product details View more product details
View more product details Click for more details

6" Carbon Steel Matte Black Powder Coated Baseplate Part # mp-00040466

6" Carbon Steel Matte Black Powder Coated Baseplate -
Part #: mp-00040466
Sold & Shipped by EZTube

Each of 1

Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$15.00
$15.00 ea.
Camera Expand Details

Dimensions

  • Color: Matte Black
  • Height: 6"
  • Connection Type: Requires Connector
View more product details Click for more details

Key Features

CUSTOM CUT USA U.S.A.Made DFARS Compliant MTR MTR AVAILABLE product return Returns Acceptable.
View more product details View more product details
View more product details Click for more details

6" Carbon Steel Gloss Gray Powder Coated Baseplate Part # mp-00040464

6" Carbon Steel Gloss Gray Powder Coated Baseplate -
Part #: mp-00040464
Sold & Shipped by EZTube

Each of 1

Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$15.00
$15.00 ea.
Camera Expand Details

Dimensions

  • Color: Gloss Gray
  • Height: 6"
  • Connection Type: Requires Connector
View more product details Click for more details

Key Features

CUSTOM CUT USA U.S.A.Made DFARS Compliant MTR MTR AVAILABLE product return Returns Acceptable.
View more product details View more product details
View more product details Click for more details

12" Carbon Steel Semi-Gloss Gray Powder Coated Baseplate Part # mp-00040446

12" Carbon Steel Semi-Gloss Gray Powder Coated Baseplate -
Part #: mp-00040446
Sold & Shipped by EZTube

Each of 1

Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$18.00
$18.00 ea.
Camera Expand Details

Dimensions

  • Color: Semi-gloss Gray
  • Height: 12"
  • Connection Type: Requires Connector
View more product details Click for more details

Key Features

CUSTOM CUT USA U.S.A.Made DFARS Compliant MTR MTR AVAILABLE product return Returns Acceptable.
View more product details View more product details
View more product details Click for more details

12" Carbon Steel Gloss White Powder Coated Baseplate Part # mp-00040439

12" Carbon Steel Gloss White Powder Coated Baseplate -
Part #: mp-00040439
Sold & Shipped by EZTube

Each of 1

Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$18.00
$18.00 ea.
Camera Expand Details

Dimensions

  • Color: Gloss White
  • Height: 12"
  • Connection Type: Requires Connector
View more product details Click for more details

Key Features

CUSTOM CUT USA U.S.A.Made DFARS Compliant MTR MTR AVAILABLE product return Returns Acceptable.
View more product details View more product details
View more product details Click for more details

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