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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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3/8" x 7" Stainless Rectangle Bar 440C Oversize Ground Stock Part # 18988

3/8" x 7" Stainless Rectangle Bar 440C Oversize Ground Stock -
Part #: 18988
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
$1,135.11 for 1
$1,135.11 ea.

Dimensions

  • Thickness: 0.375"
  • Width: 7"
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-desk18988

3/8" x 8" Stainless Rectangle Bar 440C Oversize Ground Stock Part # 19000

3/8" x 8" Stainless Rectangle Bar 440C Oversize Ground Stock -
Part #: 19000
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
$1,252.86 for 1
$1,252.86 ea.

Dimensions

  • Thickness: 0.375"
  • 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-desk19000

3/8" x 9" Stainless Rectangle Bar 440C Oversize Ground Stock Part # 19008

3/8" x 9" Stainless Rectangle Bar 440C Oversize Ground Stock -
Part #: 19008
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
$1,416.37 for 1
$1,416.37 ea.

Dimensions

  • Thickness: 0.375"
  • Width: 9"
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-desk19008

3/8" x 10" Stainless Rectangle Bar 440C Oversize Ground Stock Part # 19020

3/8" x 10" Stainless Rectangle Bar 440C Oversize Ground Stock -
Part #: 19020
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
$1,574.35 for 1
$1,574.35 ea.

Dimensions

  • Thickness: 0.375"
  • 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-desk19020

3/8" x 12" Stainless Rectangle Bar 440C Oversize Ground Stock Part # 19032

3/8" x 12" Stainless Rectangle Bar 440C Oversize Ground Stock -
Part #: 19032
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
$1,796.14 for 1
$1,796.14 ea.

Dimensions

  • Thickness: 0.375"
  • 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-desk19032

3/8" Stainless Square Bar 410 Precision Ground Part # 19331

3/8" Stainless Square Bar 410 Precision Ground -
Part #: 19331
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
$204.13 for 1
$204.13 ea.

Dimensions

  • Height: 0.375"
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
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stainless-square-bar-410-1superZoom-desk19331

3/8" Stainless Square Bar 440C Oversize Ground Stock Part # 19344

3/8" Stainless Square Bar 440C Oversize Ground Stock -
Part #: 19344
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
$249.78 for 1
$249.78 ea.

Dimensions

  • Height: 0.375"
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-desk19344

3/8" x 1/2" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12093

3/8" x 1/2" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12093
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
$55.66 for 1
$55.66 ea.

Dimensions

  • Thickness: 0.375"
  • 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-desk12093

3/8" x 3/4" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12094

3/8" x 3/4" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12094
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
$61.37 for 1
$61.37 ea.

Dimensions

  • Thickness: 0.375"
  • 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-desk12094

3/8" x 1 1/4" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12096

3/8" x 1 1/4" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12096
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: 0.375"
  • 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-desk12096

3/8" x 1" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12095

3/8" x 1" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12095
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
$72.20 for 1
$72.20 ea.

Dimensions

  • Thickness: 0.375"
  • 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-desk12095

3/8" x 2" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12098

3/8" x 2" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12098
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
$101.68 for 1
$101.68 ea.

Dimensions

  • Thickness: 0.375"
  • 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-desk12098

3/8" x 2 1/2" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12099

3/8" x 2 1/2" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12099
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
$121.91 for 1
$121.91 ea.

Dimensions

  • Thickness: 0.375"
  • 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-desk12099

3/8" x 3" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12100

3/8" x 3" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12100
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
$130.68 for 1
$130.68 ea.

Dimensions

  • Thickness: 0.375"
  • 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-desk12100

3/8" x 1 1/2" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12097

3/8" x 1 1/2" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12097
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
$85.73 for 1
$85.73 ea.

Dimensions

  • Thickness: 0.375"
  • 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-desk12097

3/8" x 4" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12102

3/8" x 4" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12102
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
$165.99 for 1
$165.99 ea.

Dimensions

  • Thickness: 0.375"
  • 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-desk12102

3/8" x 6" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12104

3/8" x 6" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12104
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
$238.70 for 1
$238.70 ea.

Dimensions

  • Thickness: 0.375"
  • 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-desk12104

3/8" x 5" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12103

3/8" x 5" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12103
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
$204.09 for 1
$204.09 ea.

Dimensions

  • Thickness: 0.375"
  • 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-desk12103

3/8" x 3 1/2" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12101

3/8" x 3 1/2" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12101
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
$153.05 for 1
$153.05 ea.

Dimensions

  • Thickness: 0.375"
  • 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-desk12101

3/8" x 7" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12105

3/8" x 7" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12105
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
$271.95 for 1
$271.95 ea.

Dimensions

  • Thickness: 0.375"
  • 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
View more product details Click for more details
tool-steel-rectangle-bar-1018-1superZoom-desk12105

3/8" x 8" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12106

3/8" x 8" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12106
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
$302.45 for 1
$302.45 ea.

Dimensions

  • Thickness: 0.375"
  • 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-desk12106

3/8" x 9" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12107

3/8" x 9" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12107
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
$334.99 for 1
$334.99 ea.

Dimensions

  • Thickness: 0.375"
  • 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-desk12107

3/8" x 12" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12109

3/8" x 12" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12109
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
$422.92 for 1
$422.92 ea.

Dimensions

  • Thickness: 0.375"
  • Width: 12"
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-desk12109

3/8" x 10" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12108

3/8" x 10" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12108
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
$367.30 for 1
$367.30 ea.

Dimensions

  • Thickness: 0.375"
  • Width: 10"
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-desk12108

3/8" x 5/8" Tool Steel Rectangle Bar A2 Precision Ground Part # 12111

3/8" x 5/8" Tool Steel Rectangle Bar A2 Precision Ground -
Part #: 12111
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
$77.28 for 1
$77.28 ea.

Dimensions

  • Thickness: 0.375"
  • Width: 0.625"
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
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tool-steel-rectangle-bar-a2-1superZoom-desk12111

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