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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" Tool Steel Rectangle Bar O1 Precision Ground Part # 12016

1/4" x 6" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12016
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
$229.30 for 1
$229.30 ea.

Dimensions

  • Thickness: 0.25"
  • 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-desk12016

1/4" x 7" Tool Steel Rectangle Bar O1 Precision Ground Part # 12017

1/4" x 7" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12017
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
$289.97 for 1
$289.97 ea.

Dimensions

  • Thickness: 0.25"
  • Width: 7"
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-desk12017

1/4" x 8" Tool Steel Rectangle Bar O1 Precision Ground Part # 12018

1/4" x 8" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12018
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
$328.00 for 1
$328.00 ea.

Dimensions

  • Thickness: 0.25"
  • 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-desk12018

1/4" x 10" Tool Steel Rectangle Bar O1 Precision Ground Part # 12019

1/4" x 10" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12019
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
$402.95 for 1
$402.95 ea.

Dimensions

  • Thickness: 0.25"
  • 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-desk12019

1/4" x 12" Tool Steel Rectangle Bar O1 Precision Ground Part # 12020

1/4" x 12" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12020
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
$478.33 for 1
$478.33 ea.

Dimensions

  • Thickness: 0.25"
  • 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-desk12020

1/4" x 14" Tool Steel Rectangle Bar O1 Precision Ground Part # 12021

1/4" x 14" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12021
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
$551.35 for 1
$551.35 ea.

Dimensions

  • Thickness: 0.25"
  • Width: 14"
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-desk12021

1/4" x 1/2" Stainless Rectangle Bar 410 Precision Ground Part # 18637

1/4" x 1/2" Stainless Rectangle Bar 410 Precision Ground -
Part #: 18637
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
$164.57 for 1
$164.57 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-A240

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-desk18637

1/4" x 3/4" Stainless Rectangle Bar 410 Precision Ground Part # 18643

1/4" x 3/4" Stainless Rectangle Bar 410 Precision Ground -
Part #: 18643
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

By selecting "Single Heat Lot Required" option, we ensure all cut pieces are sourced from a single heat lot for consistency in material characteristics.

QTY

Update
$177.87 for 1
$177.87 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-A240

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-desk18643

1/4" x 1" Stainless Rectangle Bar 410 Precision Ground Part # 18651

1/4" x 1" Stainless Rectangle Bar 410 Precision Ground -
Part #: 18651
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
$194.38 for 1
$194.38 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-A240

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-desk18651

1/4" x 1 1/4" Stainless Rectangle Bar 410 Precision Ground Part # 18661

1/4" x 1 1/4" Stainless Rectangle Bar 410 Precision Ground -
Part #: 18661
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
$214.72 for 1
$214.72 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-A240

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-desk18661

1/4" x 1 1/2" Stainless Rectangle Bar 410 Precision Ground Part # 18672

1/4" x 1 1/2" Stainless Rectangle Bar 410 Precision Ground -
Part #: 18672
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
$241.52 for 1
$241.52 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-A240

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-desk18672

1/4" x 2" Stainless Rectangle Bar 410 Precision Ground Part # 18682

1/4" x 2" Stainless Rectangle Bar 410 Precision Ground -
Part #: 18682
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
$300.59 for 1
$300.59 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-A240

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-desk18682

1/4" x 2 1/2" Stainless Rectangle Bar 410 Precision Ground Part # 18697

1/4" x 2 1/2" Stainless Rectangle Bar 410 Precision Ground -
Part #: 18697
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
$353.29 for 1
$353.29 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-A240

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-desk18697

1/4" x 3" Stainless Rectangle Bar 410 Precision Ground Part # 18708

1/4" x 3" Stainless Rectangle Bar 410 Precision Ground -
Part #: 18708
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
$385.43 for 1
$385.43 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-A240

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-desk18708

1/4" x 3 1/2" Stainless Rectangle Bar 410 Precision Ground Part # 18723

1/4" x 3 1/2" Stainless Rectangle Bar 410 Precision Ground -
Part #: 18723
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
$402.71 for 1
$402.71 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-A240

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-desk18723

1/4" x 5" Stainless Rectangle Bar 410 Precision Ground Part # 18746

1/4" x 5" Stainless Rectangle Bar 410 Precision Ground -
Part #: 18746
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
$650.43 for 1
$650.43 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-A240

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-desk18746

1/4" x 6" Stainless Rectangle Bar 410 Precision Ground Part # 18758

1/4" x 6" Stainless Rectangle Bar 410 Precision Ground -
Part #: 18758
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
$703.40 for 1
$703.40 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-A240

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-desk18758

1/4" x 8" Stainless Rectangle Bar 410 Precision Ground Part # 18778

1/4" x 8" Stainless Rectangle Bar 410 Precision Ground -
Part #: 18778
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
$892.46 for 1
$892.46 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-A240

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-desk18778

1/4" x 10" Stainless Rectangle Bar 410 Precision Ground Part # 18798

1/4" x 10" Stainless Rectangle Bar 410 Precision Ground -
Part #: 18798
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
$1,064.28 for 1
$1,064.28 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-A240

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-desk18798

1/4" x 12" Stainless Rectangle Bar 410 Precision Ground Part # 18810

1/4" x 12" Stainless Rectangle Bar 410 Precision Ground -
Part #: 18810
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
$1,374.43 for 1
$1,374.43 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-A240

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-desk18810

1/4" x 1" Stainless Rectangle Bar 420 Oversize Ground Stock Part # 18819

1/4" x 1" Stainless Rectangle Bar 420 Oversize Ground Stock -
Part #: 18819
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
$343.07 for 1
$343.07 ea.

Dimensions

  • Thickness: 0.25"
  • Width: 1"
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
View more product details View more product details
View more product details Click for more details
stainless-rectangle-bar-420-oversize-1superZoom-desk18819

1/4" x 2" Stainless Rectangle Bar 420 Oversize Ground Stock Part # 18823

1/4" x 2" Stainless Rectangle Bar 420 Oversize Ground Stock -
Part #: 18823
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
$533.34 for 1
$533.34 ea.

Dimensions

  • Thickness: 0.25"
  • Width: 2"
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
View more product details View more product details
View more product details Click for more details
stainless-rectangle-bar-420-oversize-1superZoom-desk18823

1/4" x 3" Stainless Rectangle Bar 420 Oversize Ground Stock Part # 18829

1/4" x 3" Stainless Rectangle Bar 420 Oversize Ground Stock -
Part #: 18829
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
$728.85 for 1
$728.85 ea.

Dimensions

  • Thickness: 0.25"
  • Width: 3"
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
View more product details View more product details
View more product details Click for more details
stainless-rectangle-bar-420-oversize-1superZoom-desk18829

1/4" x 4" Stainless Rectangle Bar 420 Oversize Ground Stock Part # 18835

1/4" x 4" Stainless Rectangle Bar 420 Oversize Ground Stock -
Part #: 18835
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
$919.04 for 1
$919.04 ea.

Dimensions

  • Thickness: 0.25"
  • Width: 4"
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
View more product details View more product details
View more product details Click for more details
stainless-rectangle-bar-420-oversize-1superZoom-desk18835

1/4" x 5" Stainless Rectangle Bar 420 Oversize Ground Stock Part # 18841

1/4" x 5" Stainless Rectangle Bar 420 Oversize Ground Stock -
Part #: 18841
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
$1,109.38 for 1
$1,109.38 ea.

Dimensions

  • Thickness: 0.25"
  • Width: 5"
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
View more product details View more product details
View more product details Click for more details
stainless-rectangle-bar-420-oversize-1superZoom-desk18841

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