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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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1/4" x 6" Stainless Rectangle Bar 420 Oversize Ground Stock Part # 18846

1/4" x 6" Stainless Rectangle Bar 420 Oversize Ground Stock -
Part #: 18846
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
$1,299.80 for 1
$1,299.80 ea.

Dimensions

  • Thickness: 0.25"
  • Width: 6"
Click for more details
stainless-rectangle-bar-420-oversize-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A276

Key Features

MTR FREE MTR Available
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stainless-rectangle-bar-420-oversize-1superZoom-desk18846

1/4" x 1/2" Stainless Rectangle Bar 440C Oversize Ground Stock Part # 18854

1/4" x 1/2" Stainless Rectangle Bar 440C Oversize Ground Stock -
Part #: 18854
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
$203.25 for 1
$203.25 ea.

Dimensions

  • Thickness: 0.25"
  • Width: 0.5"
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-desk18854

1/4" x 3/4" Stainless Rectangle Bar 440C Oversize Ground Stock Part # 18860

1/4" x 3/4" Stainless Rectangle Bar 440C Oversize Ground Stock -
Part #: 18860
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
$217.85 for 1
$217.85 ea.

Dimensions

  • Thickness: 0.25"
  • Width: 0.75"
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
View more product details View more product details
View more product details Click for more details
stainless-rectangle-bar-410-1superZoom-desk18860

1/4" x 1" Stainless Rectangle Bar 440C Oversize Ground Stock Part # 18868

1/4" x 1" Stainless Rectangle Bar 440C Oversize Ground Stock -
Part #: 18868
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
$236.52 for 1
$236.52 ea.

Dimensions

  • Thickness: 0.25"
  • 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-desk18868

9/32" Tool Steel Square Bar O1 Precision Ground Part # 12461

9/32" Tool Steel Square Bar O1 Precision Ground -
Part #: 12461
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
$50.95 for 1
$50.95 ea.

Dimensions

  • Height: 0.28125"
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
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tool-steel-square-bar-o1-1superZoom-desk12461

9/32" x 3/4" Tool Steel Rectangle Bar O1 Precision Ground Part # 12023

9/32" x 3/4" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12023
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
$57.40 for 1
$57.40 ea.

Dimensions

  • Thickness: 0.2813"
  • 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
View more product details View more product details
View more product details Click for more details
tool-steel-rectangle-bar-o1-1superZoom-desk12023

9/32" x 1" Tool Steel Rectangle Bar O1 Precision Ground Part # 12024

9/32" x 1" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12024
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
$66.83 for 1
$66.83 ea.

Dimensions

  • Thickness: 0.2813"
  • 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
View more product details View more product details
View more product details Click for more details
tool-steel-rectangle-bar-o1-1superZoom-desk12024

9/32" x 1/2" Tool Steel Rectangle Bar O1 Precision Ground Part # 12022

9/32" x 1/2" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12022
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
$48.22 for 1
$48.22 ea.

Dimensions

  • Thickness: 0.2813"
  • Width: 0.5"
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-desk12022

9/32" x 1 1/4" Tool Steel Rectangle Bar O1 Precision Ground Part # 12025

9/32" x 1 1/4" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12025
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
$75.20 for 1
$75.20 ea.

Dimensions

  • Thickness: 0.2813"
  • 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
View more product details View more product details
View more product details Click for more details
tool-steel-rectangle-bar-o1-1superZoom-desk12025

9/32" x 1 1/2" Tool Steel Rectangle Bar O1 Precision Ground Part # 12026

9/32" x 1 1/2" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12026
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
$84.63 for 1
$84.63 ea.

Dimensions

  • Thickness: 0.2813"
  • 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-desk12026

9/32" x 2" Tool Steel Rectangle Bar O1 Precision Ground Part # 12027

9/32" x 2" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12027
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
$102.98 for 1
$102.98 ea.

Dimensions

  • Thickness: 0.2813"
  • 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
View more product details View more product details
View more product details Click for more details
tool-steel-rectangle-bar-o1-1superZoom-desk12027

9/32" x 3" Tool Steel Rectangle Bar O1 Precision Ground Part # 12028

9/32" x 3" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12028
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
$139.95 for 1
$139.95 ea.

Dimensions

  • Thickness: 0.2813"
  • Width: 3"
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-desk12028

9/32" x 4" Tool Steel Rectangle Bar O1 Precision Ground Part # 12029

9/32" x 4" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12029
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
$176.80 for 1
$176.80 ea.

Dimensions

  • Thickness: 0.2813"
  • Width: 4"
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-desk12029

9/32" x 6" Tool Steel Rectangle Bar O1 Precision Ground Part # 12030

9/32" x 6" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12030
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
$250.43 for 1
$250.43 ea.

Dimensions

  • Thickness: 0.2813"
  • Width: 6"
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-desk12030

5/16" x 1/2" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12031

5/16" x 1/2" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12031
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
$48.95 for 1
$48.95 ea.

Dimensions

  • Thickness: 0.3125"
  • Width: 0.5"
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-desk12031

5/16" x 3/4" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12032

5/16" x 3/4" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12032
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
$55.47 for 1
$55.47 ea.

Dimensions

  • Thickness: 0.3125"
  • 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-desk12032

5/16" x 1 1/4" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12034

5/16" x 1 1/4" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12034
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
$71.00 for 1
$71.00 ea.

Dimensions

  • Thickness: 0.3125"
  • 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-desk12034

5/16" x 1" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12033

5/16" x 1" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12033
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
$65.42 for 1
$65.42 ea.

Dimensions

  • Thickness: 0.3125"
  • 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-desk12033

5/16" x 1 1/2" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12035

5/16" x 1 1/2" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12035
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
$79.26 for 1
$79.26 ea.

Dimensions

  • Thickness: 0.3125"
  • 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-desk12035

5/16" x 2" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12036

5/16" x 2" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12036
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
$94.74 for 1
$94.74 ea.

Dimensions

  • Thickness: 0.3125"
  • 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-desk12036

5/16" x 3 1/2" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12039

5/16" x 3 1/2" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12039
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
$141.83 for 1
$141.83 ea.

Dimensions

  • Thickness: 0.3125"
  • 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-desk12039

5/16" x 2 1/2" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12037

5/16" x 2 1/2" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12037
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
$110.25 for 1
$110.25 ea.

Dimensions

  • Thickness: 0.3125"
  • 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-desk12037

5/16" x 3" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12038

5/16" x 3" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12038
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
$125.44 for 1
$125.44 ea.

Dimensions

  • Thickness: 0.3125"
  • 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-desk12038

5/16" x 4" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12040

5/16" x 4" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12040
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
$158.20 for 1
$158.20 ea.

Dimensions

  • Thickness: 0.3125"
  • 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-desk12040

5/16" x 5" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12041

5/16" x 5" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12041
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
$188.06 for 1
$188.06 ea.

Dimensions

  • Thickness: 0.3125"
  • 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-desk12041

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