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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
View more product details View more product details
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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
View more product details View more product details
View more product details Click for more details
stainless-rectangle-bar-410-1superZoom-desk18868

1/4" x 1 1/4" Stainless Rectangle Bar 440C Oversize Ground Stock Part # 18878

1/4" x 1 1/4" Stainless Rectangle Bar 440C Oversize Ground Stock -
Part #: 18878
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
$259.55 for 1
$259.55 ea.

Dimensions

  • Thickness: 0.25"
  • Width: 1.25"
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-desk18878

1/4" x 1 1/2" Stainless Rectangle Bar 440C Oversize Ground Stock Part # 18890

1/4" x 1 1/2" Stainless Rectangle Bar 440C Oversize Ground Stock -
Part #: 18890
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
$289.39 for 1
$289.39 ea.

Dimensions

  • Thickness: 0.25"
  • Width: 1.5"
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
View more product details View more product details
View more product details Click for more details
stainless-rectangle-bar-410-1superZoom-desk18890

1/4" x 2" Stainless Rectangle Bar 440C Oversize Ground Stock Part # 18901

1/4" x 2" Stainless Rectangle Bar 440C Oversize Ground Stock -
Part #: 18901
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
$355.72 for 1
$355.72 ea.

Dimensions

  • Thickness: 0.25"
  • Width: 2"
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-desk18901

1/4" x 2 1/2" Stainless Rectangle Bar 440C Oversize Ground Stock Part # 18916

1/4" x 2 1/2" Stainless Rectangle Bar 440C Oversize Ground Stock -
Part #: 18916
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
$414.66 for 1
$414.66 ea.

Dimensions

  • Thickness: 0.25"
  • Width: 2.5"
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
View more product details View more product details
View more product details Click for more details
stainless-rectangle-bar-410-1superZoom-desk18916

1/4" x 3" Stainless Rectangle Bar 440C Oversize Ground Stock Part # 18927

1/4" x 3" Stainless Rectangle Bar 440C Oversize Ground Stock -
Part #: 18927
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
$450.53 for 1
$450.53 ea.

Dimensions

  • Thickness: 0.25"
  • Width: 3"
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-desk18927

1/4" x 3 1/2" Stainless Rectangle Bar 440C Oversize Ground Stock Part # 18942

1/4" x 3 1/2" Stainless Rectangle Bar 440C Oversize Ground Stock -
Part #: 18942
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
$470.03 for 1
$470.03 ea.

Dimensions

  • Thickness: 0.25"
  • Width: 3.5"
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
View more product details View more product details
View more product details Click for more details
stainless-rectangle-bar-410-1superZoom-desk18942

1/4" x 4" Stainless Rectangle Bar 440C Oversize Ground Stock Part # 18953

1/4" x 4" Stainless Rectangle Bar 440C Oversize Ground Stock -
Part #: 18953
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
$593.32 for 1
$593.32 ea.

Dimensions

  • Thickness: 0.25"
  • Width: 4"
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-desk18953

1/4" x 5" Stainless Rectangle Bar 440C Oversize Ground Stock Part # 18966

1/4" x 5" Stainless Rectangle Bar 440C Oversize Ground Stock -
Part #: 18966
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
$747.47 for 1
$747.47 ea.

Dimensions

  • Thickness: 0.25"
  • Width: 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
View more product details View more product details
View more product details Click for more details
stainless-rectangle-bar-410-1superZoom-desk18966

1/4" x 6" Stainless Rectangle Bar 440C Oversize Ground Stock Part # 18978

1/4" x 6" Stainless Rectangle Bar 440C Oversize Ground Stock -
Part #: 18978
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
$806.79 for 1
$806.79 ea.

Dimensions

  • Thickness: 0.25"
  • Width: 6"
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-desk18978

1/4" x 8" Stainless Rectangle Bar 440C Oversize Ground Stock Part # 18998

1/4" x 8" Stainless Rectangle Bar 440C Oversize Ground Stock -
Part #: 18998
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
$1,018.56 for 1
$1,018.56 ea.

Dimensions

  • Thickness: 0.25"
  • Width: 8"
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-desk18998

1/4" x 10" Stainless Rectangle Bar 440C Oversize Ground Stock Part # 19018

1/4" x 10" Stainless Rectangle Bar 440C Oversize Ground Stock -
Part #: 19018
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
$1,210.86 for 1
$1,210.86 ea.

Dimensions

  • Thickness: 0.25"
  • Width: 10"
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-desk19018

1/4" x 12" Stainless Rectangle Bar 440C Oversize Ground Stock Part # 19030

1/4" x 12" Stainless Rectangle Bar 440C Oversize Ground Stock -
Part #: 19030
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
$1,558.45 for 1
$1,558.45 ea.

Dimensions

  • Thickness: 0.25"
  • Width: 12"
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-desk19030

1/4" Stainless Square Bar 410 Precision Ground Part # 19329

1/4" Stainless Square Bar 410 Precision Ground -
Part #: 19329
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
$145.95 for 1
$145.95 ea.

Dimensions

  • Height: 0.25"
Click for more details
stainless-square-bar-410-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A240

Key Features

MTR FREE MTR Available
View more product details View more product details
View more product details Click for more details
stainless-square-bar-410-1superZoom-desk19329

1/4" Stainless Square Bar 440C Oversize Ground Stock Part # 19341

1/4" Stainless Square Bar 440C Oversize Ground Stock -
Part #: 19341
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
$182.48 for 1
$182.48 ea.

Dimensions

  • Height: 0.25"
Click for more details
stainless-square-bar-440c-oversize-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-square-bar-440c-oversize-1superZoom-desk19341

1/4" Tool Steel Square Bar O1 Ground Oversize Part # 12431

1/4" Tool Steel Square Bar O1 Ground Oversize -
Part #: 12431
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
$49.97 for 1
$49.97 ea.

Dimensions

  • Height: 0.25"
Click for more details
tool-steel-square-bar-o1-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-square-bar-o1-oversize-1superZoom-desk12431

1/4" Tool Steel Square Bar A2 Ground Oversize Part # 12430

1/4" Tool Steel Square Bar A2 Ground Oversize -
Part #: 12430
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
$117.79 for 1
$117.79 ea.

Dimensions

  • Height: 0.25"
Click for more details
tool-steel-square-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-square-bar-a2-oversize-1superZoom-desk12430

1/4" Tool Steel Square Bar A2 Precision Ground Part # 12459

1/4" Tool Steel Square Bar A2 Precision Ground -
Part #: 12459
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
$65.48 for 1
$65.48 ea.

Dimensions

  • Height: 0.25"
Click for more details
tool-steel-square-bar-a2-1superZoom-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-square-bar-a2-1superZoom-desk12459

1/4" Tool Steel Square Bar O1 Precision Ground Part # 12460

1/4" Tool Steel Square Bar O1 Precision Ground -
Part #: 12460
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
$49.03 for 1
$49.03 ea.

Dimensions

  • Height: 0.25"
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
View more product details Click for more details
tool-steel-square-bar-o1-1superZoom-desk12460

1/4" Carbon Steel Square Bar 1018 Precision Ground Part # 12458

1/4" Carbon Steel Square Bar 1018 Precision Ground -
Part #: 12458
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
$34.64 for 1
$34.64 ea.

Dimensions

  • Height: 0.25"
Click for more details
tool-steel-square-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-square-bar-1018-1superZoom-desk12458

1/4" x 10" Tool Steel Rectangle Bar A2 Precision Ground Part # 13743

1/4" x 10" Tool Steel Rectangle Bar A2 Precision Ground -
Part #: 13743
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
$491.65 for 1
$491.65 ea.

Dimensions

  • Thickness: 0.25"
  • Width: 10"
Click for more details
tool-steel-rectangle-bar-a2-1superZoom-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-a2-1superZoom-desk13743

1/4" x 12" Tool Steel Rectangle Bar A2 Precision Ground Part # 13744

1/4" x 12" Tool Steel Rectangle Bar A2 Precision Ground -
Part #: 13744
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
$584.67 for 1
$584.67 ea.

Dimensions

  • Thickness: 0.25"
  • Width: 12"
Click for more details
tool-steel-rectangle-bar-a2-1superZoom-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-a2-1superZoom-desk13744

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