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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 6" Stainless Rectangle Bar 440C Oversize Ground Stock Part # 18980

3/8" x 6" Stainless Rectangle Bar 440C Oversize Ground Stock -
Part #: 18980
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
$900.35 for 1
$900.35 ea.

Dimensions

  • Thickness: 0.375"
  • 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
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stainless-rectangle-bar-410-1superZoom-desk18980

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
View more product details View more product details
View more product details Click for more details
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" Tool Steel Square Bar A2 Ground Oversize Part # 12434

3/8" Tool Steel Square Bar A2 Ground Oversize -
Part #: 12434
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
$160.42 for 1
$160.42 ea.

Dimensions

  • Height: 0.375"
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-desk12434

3/8" Tool Steel Square Bar O1 Ground Oversize Part # 12435

3/8" Tool Steel Square Bar O1 Ground Oversize -
Part #: 12435
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
$68.00 for 1
$68.00 ea.

Dimensions

  • Height: 0.375"
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-desk12435

3/8" Tool Steel Square Bar A2 Precision Ground Part # 12466

3/8" Tool Steel Square Bar A2 Precision Ground -
Part #: 12466
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
$89.20 for 1
$89.20 ea.

Dimensions

  • Height: 0.375"
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-desk12466

3/8" Tool Steel Square Bar O1 Precision Ground Part # 12467

3/8" Tool Steel Square Bar O1 Precision Ground -
Part #: 12467
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

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

QTY

Update
$66.60 for 1
$66.60 ea.

Dimensions

  • Height: 0.375"
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-desk12467

3/8" Carbon Steel Square Bar 1018 Precision Ground Part # 12465

3/8" Carbon Steel Square Bar 1018 Precision Ground -
Part #: 12465
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
$50.79 for 1
$50.79 ea.

Dimensions

  • Height: 0.375"
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-desk12465

3/8" x 10" Tool Steel Rectangle Bar A2 Precision Ground Part # 13773

3/8" x 10" Tool Steel Rectangle Bar A2 Precision Ground -
Part #: 13773
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
$671.50 for 1
$671.50 ea.

Dimensions

  • Thickness: 0.375"
  • 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-desk13773

3/8" x 12" Tool Steel Rectangle Bar A2 Precision Ground Part # 13774

3/8" x 12" Tool Steel Rectangle Bar A2 Precision Ground -
Part #: 13774
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
$797.95 for 1
$797.95 ea.

Dimensions

  • Thickness: 0.375"
  • 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-desk13774

3/8" x 1" Tool Steel Rectangle Bar H13 Ground Oversize Part # 19103

3/8" x 1" Tool Steel Rectangle Bar H13 Ground Oversize -
Part #: 19103
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
$256.44 for 1
$256.44 ea.

Dimensions

  • Thickness: 0.375"
  • Width: 1"
Click for more details
tool-steel-rectangle-bar-h13-oversize-1superZoom-mob{product.code}

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-h13-oversize-1superZoom-desk19103

3/8" x 2" Tool Steel Rectangle Bar H13 Ground Oversize Part # 19107

3/8" x 2" Tool Steel Rectangle Bar H13 Ground Oversize -
Part #: 19107
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
$397.88 for 1
$397.88 ea.

Dimensions

  • Thickness: 0.375"
  • Width: 2"
Click for more details
tool-steel-rectangle-bar-h13-oversize-1superZoom-mob{product.code}

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-h13-oversize-1superZoom-desk19107

3/8" x 3" Tool Steel Rectangle Bar H13 Ground Oversize Part # 19112

3/8" x 3" Tool Steel Rectangle Bar H13 Ground Oversize -
Part #: 19112
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
$543.24 for 1
$543.24 ea.

Dimensions

  • Thickness: 0.375"
  • Width: 3"
Click for more details
tool-steel-rectangle-bar-h13-oversize-1superZoom-mob{product.code}

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-h13-oversize-1superZoom-desk19112

3/8" x 4" Tool Steel Rectangle Bar H13 Ground Oversize Part # 19117

3/8" x 4" Tool Steel Rectangle Bar H13 Ground Oversize -
Part #: 19117
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
$684.70 for 1
$684.70 ea.

Dimensions

  • Thickness: 0.375"
  • Width: 4"
Click for more details
tool-steel-rectangle-bar-h13-oversize-1superZoom-mob{product.code}

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-h13-oversize-1superZoom-desk19117

3/8" x 16" Tool Steel Rectangle Bar S7 Ground Oversize Part # 26963

3/8" x 16" Tool Steel Rectangle Bar S7 Ground Oversize -
Part #: 26963
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
$585.62 for 1
$585.62 ea.

Dimensions

  • Thickness: 0.375"
  • Width: 16"
Click for more details
tool-steel-rectangle-bar-s7-oversize-1superZoom-mob{product.code}

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-s7-oversize-1superZoom-desk26963

7/16" x 1/2" Tool Steel Rectangle Bar O1 Precision Ground Part # 12156

7/16" x 1/2" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12156
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

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

QTY

Update
$71.70 for 1
$71.70 ea.

Dimensions

  • Thickness: 0.4375"
  • Width: 0.5"
Click for more details
tool-steel-rectangle-bar-o1-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

MTR FREE MTR Available
View more product details View more product details
View more product details Click for more details
tool-steel-rectangle-bar-o1-1superZoom-desk12156

7/16" x 1" Tool Steel Rectangle Bar O1 Precision Ground Part # 12158

7/16" x 1" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12158
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
$98.15 for 1
$98.15 ea.

Dimensions

  • Thickness: 0.4375"
  • Width: 1"
Click for more details
tool-steel-rectangle-bar-o1-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

MTR FREE MTR Available
View more product details View more product details
View more product details Click for more details
tool-steel-rectangle-bar-o1-1superZoom-desk12158

7/16" x 1 1/4" Tool Steel Rectangle Bar O1 Precision Ground Part # 12159

7/16" x 1 1/4" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12159
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

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

QTY

Update
$110.43 for 1
$110.43 ea.

Dimensions

  • Thickness: 0.4375"
  • Width: 1.25"
Click for more details
tool-steel-rectangle-bar-o1-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

MTR FREE MTR Available
View more product details View more product details
View more product details Click for more details
tool-steel-rectangle-bar-o1-1superZoom-desk12159

7/16" x 1 1/2" Tool Steel Rectangle Bar O1 Precision Ground Part # 12160

7/16" x 1 1/2" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12160
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
$123.65 for 1
$123.65 ea.

Dimensions

  • Thickness: 0.4375"
  • Width: 1.5"
Click for more details
tool-steel-rectangle-bar-o1-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

MTR FREE MTR Available
View more product details View more product details
View more product details Click for more details
tool-steel-rectangle-bar-o1-1superZoom-desk12160

7/16" x 3/4" Tool Steel Rectangle Bar O1 Precision Ground Part # 12157

7/16" x 3/4" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12157
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

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

QTY

Update
$84.90 for 1
$84.90 ea.

Dimensions

  • Thickness: 0.4375"
  • Width: 0.75"
Click for more details
tool-steel-rectangle-bar-o1-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

MTR FREE MTR Available
View more product details View more product details
View more product details Click for more details
tool-steel-rectangle-bar-o1-1superZoom-desk12157

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