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Ground Flat Stock

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Ground Flat Stock

Ground flat stock at OnlineMetals is a precision-ground, rectangular bar made from high-quality tool, alloy, stainless, or carbon steels, engineered to tight tolerances for flatness, dimension, and surface finish. It’s ideal for applications in tool & die, machining, gauges, or precision parts where consistent thickness and smooth surfaces are essential. OnlineMetals offers a range of grades—such as A2, D2, O1, 4140, and various stainless alloys—cut to size to avoid excess material waste. The stock is surface ground on all four faces, eliminating defects and decarburization, and arrives ready for further machining or finishing. With quick processing and inventory across multiple grades and sizes, it provides an efficient, reliable source for professionals and hobbyists needing precision material.

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1/2" x 1" Stainless Rectangle Bar 440C Oversize Ground Stock Part # 18871

1/2" x 1" Stainless Rectangle Bar 440C Oversize Ground Stock -
Part #: 18871
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
$301.52 for 1
$301.52 ea.

Dimensions

  • Thickness: 0.5"
  • Width: 1"
Click for more details
stainless-rectangle-bar-410-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A276

Key Features

MTR FREE MTR Available
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stainless-rectangle-bar-410-1superZoom-desk18871

9/16" x 3/4" Tool Steel Rectangle Bar O1 Precision Ground Part # 12223

9/16" x 3/4" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12223
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
$102.88 for 1
$102.88 ea.

Dimensions

  • Thickness: 0.5625"
  • Width: 0.75"
Click for more details
tool-steel-rectangle-bar-o1-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

MTR FREE MTR Available
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tool-steel-rectangle-bar-o1-1superZoom-desk12223

9/16" x 1 1/4" Tool Steel Rectangle Bar O1 Precision Ground Part # 12225

9/16" x 1 1/4" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12225
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
$134.05 for 1
$134.05 ea.

Dimensions

  • Thickness: 0.5625"
  • Width: 1.25"
Click for more details
tool-steel-rectangle-bar-o1-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

MTR FREE MTR Available
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tool-steel-rectangle-bar-o1-1superZoom-desk12225

9/16" x 1" Tool Steel Rectangle Bar O1 Precision Ground Part # 12224

9/16" x 1" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12224
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
$118.52 for 1
$118.52 ea.

Dimensions

  • Thickness: 0.5625"
  • Width: 1"
Click for more details
tool-steel-rectangle-bar-o1-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

MTR FREE MTR Available
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tool-steel-rectangle-bar-o1-1superZoom-desk12224

9/16" x 2" Tool Steel Rectangle Bar O1 Precision Ground Part # 12227

9/16" x 2" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12227
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
$181.33 for 1
$181.33 ea.

Dimensions

  • Thickness: 0.5625"
  • Width: 2"
Click for more details
tool-steel-rectangle-bar-o1-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

MTR FREE MTR Available
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tool-steel-rectangle-bar-o1-1superZoom-desk12227

9/16" x 1 1/2" Tool Steel Rectangle Bar O1 Precision Ground Part # 12226

9/16" x 1 1/2" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12226
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
$149.77 for 1
$149.77 ea.

Dimensions

  • Thickness: 0.5625"
  • Width: 1.5"
Click for more details
tool-steel-rectangle-bar-o1-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

MTR FREE MTR Available
View more product details View more product details
View more product details Click for more details
tool-steel-rectangle-bar-o1-1superZoom-desk12226

9/16" Tool Steel Square Bar O1 Precision Ground Part # 12473

9/16" Tool Steel Square Bar O1 Precision Ground -
Part #: 12473
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
$150.89 for 1
$150.89 ea.

Dimensions

  • Height: 0.5625"
Click for more details
tool-steel-square-bar-o1-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

MTR FREE MTR Available
View more product details View more product details
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tool-steel-square-bar-o1-1superZoom-desk12473

9/16" x 2" Tool Steel Rectangle Bar A2 Ground Oversize Part # 11498

9/16" x 2" Tool Steel Rectangle Bar A2 Ground Oversize -
Part #: 11498
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
$243.98 for 1
$243.98 ea.

Dimensions

  • Thickness: 0.5625"
  • Width: 2"
Click for more details
tool-steel-rectangle-bar-a2-oversize-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

MTR FREE MTR Available
View more product details View more product details
View more product details Click for more details
tool-steel-rectangle-bar-a2-oversize-1superZoom-desk11498

9/16" x 2 1/2" Tool Steel Rectangle Bar A2 Ground Oversize Part # 11499

9/16" x 2 1/2" Tool Steel Rectangle Bar A2 Ground Oversize -
Part #: 11499
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
$248.52 for 1
$248.52 ea.

Dimensions

  • Thickness: 0.5625"
  • Width: 2.5"
Click for more details
tool-steel-rectangle-bar-a2-oversize-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

MTR FREE MTR Available
View more product details View more product details
View more product details Click for more details
tool-steel-rectangle-bar-a2-oversize-1superZoom-desk11499

9/16" x 3" Tool Steel Rectangle Bar A2 Ground Oversize Part # 11500

9/16" x 3" Tool Steel Rectangle Bar A2 Ground Oversize -
Part #: 11500
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
$323.83 for 1
$323.83 ea.

Dimensions

  • Thickness: 0.5625"
  • Width: 3"
Click for more details
tool-steel-rectangle-bar-a2-oversize-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

MTR FREE MTR Available
View more product details View more product details
View more product details Click for more details
tool-steel-rectangle-bar-a2-oversize-1superZoom-desk11500

9/16" x 4" Tool Steel Rectangle Bar A2 Ground Oversize Part # 11501

9/16" x 4" Tool Steel Rectangle Bar A2 Ground Oversize -
Part #: 11501
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
$411.15 for 1
$411.15 ea.

Dimensions

  • Thickness: 0.5625"
  • Width: 4"
Click for more details
tool-steel-rectangle-bar-a2-oversize-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

MTR FREE MTR Available
View more product details View more product details
View more product details Click for more details
tool-steel-rectangle-bar-a2-oversize-1superZoom-desk11501

5/8" x 3/4" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12228

5/8" x 3/4" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12228
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
$82.88 for 1
$82.88 ea.

Dimensions

  • Thickness: 0.625"
  • Width: 0.75"
Click for more details
tool-steel-rectangle-bar-1018-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681

Key Features

MTR FREE MTR Available
View more product details View more product details
View more product details Click for more details
tool-steel-rectangle-bar-1018-1superZoom-desk12228

5/8" x 1" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12229

5/8" x 1" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12229
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
$95.04 for 1
$95.04 ea.

Dimensions

  • Thickness: 0.625"
  • Width: 1"
Click for more details
tool-steel-rectangle-bar-1018-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681

Key Features

MTR FREE MTR Available
View more product details View more product details
View more product details Click for more details
tool-steel-rectangle-bar-1018-1superZoom-desk12229

5/8" x 1 1/4" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12230

5/8" x 1 1/4" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12230
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
$108.19 for 1
$108.19 ea.

Dimensions

  • Thickness: 0.625"
  • Width: 1.25"
Click for more details
tool-steel-rectangle-bar-1018-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681

Key Features

MTR FREE MTR Available
View more product details View more product details
View more product details Click for more details
tool-steel-rectangle-bar-1018-1superZoom-desk12230

5/8" x 2" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12232

5/8" x 2" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12232
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
$138.67 for 1
$138.67 ea.

Dimensions

  • Thickness: 0.625"
  • Width: 2"
Click for more details
tool-steel-rectangle-bar-1018-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681

Key Features

MTR FREE MTR Available
View more product details View more product details
View more product details Click for more details
tool-steel-rectangle-bar-1018-1superZoom-desk12232

5/8" x 2 1/2" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12233

5/8" x 2 1/2" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12233
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
$156.56 for 1
$156.56 ea.

Dimensions

  • Thickness: 0.625"
  • Width: 2.5"
Click for more details
tool-steel-rectangle-bar-1018-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681

Key Features

MTR FREE MTR Available
View more product details View more product details
View more product details Click for more details
tool-steel-rectangle-bar-1018-1superZoom-desk12233

5/8" x 3" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12234

5/8" x 3" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12234
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
$177.60 for 1
$177.60 ea.

Dimensions

  • Thickness: 0.625"
  • Width: 3"
Click for more details
tool-steel-rectangle-bar-1018-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681

Key Features

MTR FREE MTR Available
View more product details View more product details
View more product details Click for more details
tool-steel-rectangle-bar-1018-1superZoom-desk12234

5/8" x 1 1/2" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12231

5/8" x 1 1/2" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12231
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
$117.94 for 1
$117.94 ea.

Dimensions

  • Thickness: 0.625"
  • Width: 1.5"
Click for more details
tool-steel-rectangle-bar-1018-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681

Key Features

MTR FREE MTR Available
View more product details View more product details
View more product details Click for more details
tool-steel-rectangle-bar-1018-1superZoom-desk12231

5/8" x 3 1/2" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12235

5/8" x 3 1/2" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12235
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
$195.53 for 1
$195.53 ea.

Dimensions

  • Thickness: 0.625"
  • Width: 3.5"
Click for more details
tool-steel-rectangle-bar-1018-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681

Key Features

MTR FREE MTR Available
View more product details View more product details
View more product details Click for more details
tool-steel-rectangle-bar-1018-1superZoom-desk12235

5/8" x 5" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12237

5/8" x 5" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12237
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
$259.46 for 1
$259.46 ea.

Dimensions

  • Thickness: 0.625"
  • Width: 5"
Click for more details
tool-steel-rectangle-bar-1018-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681

Key Features

MTR FREE MTR Available
View more product details View more product details
View more product details Click for more details
tool-steel-rectangle-bar-1018-1superZoom-desk12237

5/8" x 4" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12236

5/8" x 4" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12236
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
$215.55 for 1
$215.55 ea.

Dimensions

  • Thickness: 0.625"
  • Width: 4"
Click for more details
tool-steel-rectangle-bar-1018-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681

Key Features

MTR FREE MTR Available
View more product details View more product details
View more product details Click for more details
tool-steel-rectangle-bar-1018-1superZoom-desk12236

5/8" x 6" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12238

5/8" x 6" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12238
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
$296.45 for 1
$296.45 ea.

Dimensions

  • Thickness: 0.625"
  • Width: 6"
Click for more details
tool-steel-rectangle-bar-1018-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681

Key Features

MTR FREE MTR Available
View more product details View more product details
View more product details Click for more details
tool-steel-rectangle-bar-1018-1superZoom-desk12238

5/8" x 8" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12240

5/8" x 8" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12240
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
$374.12 for 1
$374.12 ea.

Dimensions

  • Thickness: 0.625"
  • Width: 8"
Click for more details
tool-steel-rectangle-bar-1018-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681

Key Features

MTR FREE MTR Available
View more product details View more product details
View more product details Click for more details
tool-steel-rectangle-bar-1018-1superZoom-desk12240

5/8" x 9" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12241

5/8" x 9" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12241
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
$421.13 for 1
$421.13 ea.

Dimensions

  • Thickness: 0.625"
  • Width: 9"
Click for more details
tool-steel-rectangle-bar-1018-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681

Key Features

MTR FREE MTR Available
View more product details View more product details
View more product details Click for more details
tool-steel-rectangle-bar-1018-1superZoom-desk12241

5/8" x 7" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12239

5/8" x 7" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12239
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
$334.23 for 1
$334.23 ea.

Dimensions

  • Thickness: 0.625"
  • Width: 7"
Click for more details
tool-steel-rectangle-bar-1018-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681

Key Features

MTR FREE MTR Available
View more product details View more product details
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tool-steel-rectangle-bar-1018-1superZoom-desk12239

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