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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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3/16" x 3 1/2" Tool Steel Rectangle Bar O1 Precision Ground Part # 11939

3/16" x 3 1/2" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 11939
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
$119.48 for 1
$119.48 ea.

Dimensions

  • Thickness: 0.1875"
  • Width: 3.5"
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
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tool-steel-rectangle-bar-o1-1superZoom-desk11939

3/16" x 4" Tool Steel Rectangle Bar O1 Precision Ground Part # 11940

3/16" x 4" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 11940
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
$134.67 for 1
$134.67 ea.

Dimensions

  • Thickness: 0.1875"
  • 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
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tool-steel-rectangle-bar-o1-1superZoom-desk11940

3/16" x 5" Tool Steel Rectangle Bar O1 Precision Ground Part # 11941

3/16" x 5" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 11941
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
$163.50 for 1
$163.50 ea.

Dimensions

  • Thickness: 0.1875"
  • Width: 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
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tool-steel-rectangle-bar-o1-1superZoom-desk11941

3/16" x 6" Tool Steel Rectangle Bar O1 Precision Ground Part # 11942

3/16" x 6" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 11942
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
$192.20 for 1
$192.20 ea.

Dimensions

  • Thickness: 0.1875"
  • 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
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tool-steel-rectangle-bar-o1-1superZoom-desk11942

3/16" x 8" Tool Steel Rectangle Bar O1 Precision Ground Part # 11943

3/16" x 8" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 11943
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
$285.75 for 1
$285.75 ea.

Dimensions

  • Thickness: 0.1875"
  • Width: 8"
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-desk11943

3/16" x 10" Tool Steel Rectangle Bar O1 Precision Ground Part # 11944

3/16" x 10" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 11944
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
$351.33 for 1
$351.33 ea.

Dimensions

  • Thickness: 0.1875"
  • Width: 10"
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-desk11944

3/16" x 12" Tool Steel Rectangle Bar O1 Precision Ground Part # 11945

3/16" x 12" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 11945
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
$417.73 for 1
$417.73 ea.

Dimensions

  • Thickness: 0.1875"
  • Width: 12"
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-desk11945

3/16" Tool Steel Square Bar A2 Ground Oversize Part # 12428

3/16" Tool Steel Square Bar A2 Ground Oversize -
Part #: 12428
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
$118.15 for 1
$118.15 ea.

Dimensions

  • Height: 0.1875"
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-desk12428

3/16" Tool Steel Square Bar O1 Ground Oversize Part # 12429

3/16" Tool Steel Square Bar O1 Ground Oversize -
Part #: 12429
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
$85.18 for 1
$85.18 ea.

Dimensions

  • Height: 0.1875"
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-desk12429

3/16" Carbon Steel Square Bar 1018 Precision Ground Part # 12454

3/16" Carbon Steel Square Bar 1018 Precision Ground -
Part #: 12454
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
$34.77 for 1
$34.77 ea.

Dimensions

  • Height: 0.1875"
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-desk12454

3/16" Tool Steel Square Bar O1 Precision Ground Part # 12456

3/16" Tool Steel Square Bar O1 Precision Ground -
Part #: 12456
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
$50.55 for 1
$50.55 ea.

Dimensions

  • Height: 0.1875"
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-desk12456

3/16" Tool Steel Square Bar A2 Precision Ground Part # 12455

3/16" Tool Steel Square Bar A2 Precision Ground -
Part #: 12455
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
$65.70 for 1
$65.70 ea.

Dimensions

  • Height: 0.1875"
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-desk12455

3/16" x 1 1/4" Stainless Rectangle Bar 440C Oversize Ground Stock Part # 18877

3/16" x 1 1/4" Stainless Rectangle Bar 440C Oversize Ground Stock -
Part #: 18877
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
$289.66 for 1
$289.66 ea.

Dimensions

  • Thickness: 0.1875"
  • 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-desk18877

3/16" x 1 1/2" Stainless Rectangle Bar 440C Oversize Ground Stock Part # 18889

3/16" x 1 1/2" Stainless Rectangle Bar 440C Oversize Ground Stock -
Part #: 18889
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
$319.53 for 1
$319.53 ea.

Dimensions

  • Thickness: 0.1875"
  • 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-desk18889

3/16" x 2" Stainless Rectangle Bar 440C Oversize Ground Stock Part # 18900

3/16" x 2" Stainless Rectangle Bar 440C Oversize Ground Stock -
Part #: 18900
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
$377.99 for 1
$377.99 ea.

Dimensions

  • Thickness: 0.1875"
  • 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-desk18900

3/16" x 2 1/2" Stainless Rectangle Bar 440C Oversize Ground Stock Part # 18915

3/16" x 2 1/2" Stainless Rectangle Bar 440C Oversize Ground Stock -
Part #: 18915
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
$441.61 for 1
$441.61 ea.

Dimensions

  • Thickness: 0.1875"
  • 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-desk18915

3/16" x 3" Stainless Rectangle Bar 440C Oversize Ground Stock Part # 18926

3/16" x 3" Stainless Rectangle Bar 440C Oversize Ground Stock -
Part #: 18926
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
$488.41 for 1
$488.41 ea.

Dimensions

  • Thickness: 0.1875"
  • 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-desk18926

3/16" x 3 1/2" Stainless Rectangle Bar 440C Oversize Ground Stock Part # 18941

3/16" x 3 1/2" Stainless Rectangle Bar 440C Oversize Ground Stock -
Part #: 18941
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
$554.41 for 1
$554.41 ea.

Dimensions

  • Thickness: 0.1875"
  • 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-desk18941

3/16" x 4" Stainless Rectangle Bar 440C Oversize Ground Stock Part # 18952

3/16" x 4" Stainless Rectangle Bar 440C Oversize Ground Stock -
Part #: 18952
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
$615.83 for 1
$615.83 ea.

Dimensions

  • Thickness: 0.1875"
  • 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-desk18952

3/16" x 5" Stainless Rectangle Bar 440C Oversize Ground Stock Part # 18965

3/16" x 5" Stainless Rectangle Bar 440C Oversize Ground Stock -
Part #: 18965
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
$735.64 for 1
$735.64 ea.

Dimensions

  • Thickness: 0.1875"
  • 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-desk18965

3/16" x 6" Stainless Rectangle Bar 440C Oversize Ground Stock Part # 18977

3/16" x 6" Stainless Rectangle Bar 440C Oversize Ground Stock -
Part #: 18977
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
$873.30 for 1
$873.30 ea.

Dimensions

  • Thickness: 0.1875"
  • 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-desk18977

3/16" x 8" Stainless Rectangle Bar 440C Oversize Ground Stock Part # 18997

3/16" x 8" Stainless Rectangle Bar 440C Oversize Ground Stock -
Part #: 18997
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
$1,076.53 for 1
$1,076.53 ea.

Dimensions

  • Thickness: 0.1875"
  • 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-desk18997

3/16" x 10" Stainless Rectangle Bar 440C Oversize Ground Stock Part # 19017

3/16" x 10" Stainless Rectangle Bar 440C Oversize Ground Stock -
Part #: 19017
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
$1,277.09 for 1
$1,277.09 ea.

Dimensions

  • Thickness: 0.1875"
  • 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-desk19017

3/16" x 12" Stainless Rectangle Bar 440C Oversize Ground Stock Part # 19029

3/16" x 12" Stainless Rectangle Bar 440C Oversize Ground Stock -
Part #: 19029
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
$1,483.62 for 1
$1,483.62 ea.

Dimensions

  • Thickness: 0.1875"
  • 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-desk19029

3/16" Stainless Square Bar 410 Precision Ground Part # 19335

3/16" Stainless Square Bar 410 Precision Ground -
Part #: 19335
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
$142.42 for 1
$142.42 ea.

Dimensions

  • Height: 0.1875"
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
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stainless-square-bar-410-1superZoom-desk19335

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