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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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5/16" x 3/4" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12032

5/16" x 3/4" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12032
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
$55.47 for 1
$55.47 ea.

Dimensions

  • Thickness: 0.3125"
  • 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
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tool-steel-rectangle-bar-1018-1superZoom-desk12032

5/16" x 1 1/4" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12034

5/16" x 1 1/4" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12034
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
$71.00 for 1
$71.00 ea.

Dimensions

  • Thickness: 0.3125"
  • 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
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tool-steel-rectangle-bar-1018-1superZoom-desk12034

5/16" x 1" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12033

5/16" x 1" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12033
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
$65.42 for 1
$65.42 ea.

Dimensions

  • Thickness: 0.3125"
  • 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-desk12033

5/16" x 1 1/2" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12035

5/16" x 1 1/2" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12035
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: 0.3125"
  • 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-desk12035

5/16" x 2" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12036

5/16" x 2" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12036
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
$94.74 for 1
$94.74 ea.

Dimensions

  • Thickness: 0.3125"
  • 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-desk12036

5/16" x 3 1/2" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12039

5/16" x 3 1/2" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12039
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
$141.83 for 1
$141.83 ea.

Dimensions

  • Thickness: 0.3125"
  • 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-desk12039

5/16" x 2 1/2" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12037

5/16" x 2 1/2" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12037
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
$110.25 for 1
$110.25 ea.

Dimensions

  • Thickness: 0.3125"
  • 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-desk12037

5/16" x 3" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12038

5/16" x 3" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12038
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
$125.44 for 1
$125.44 ea.

Dimensions

  • Thickness: 0.3125"
  • 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-desk12038

5/16" x 4" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12040

5/16" x 4" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12040
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
$158.20 for 1
$158.20 ea.

Dimensions

  • Thickness: 0.3125"
  • 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-desk12040

5/16" x 5" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12041

5/16" x 5" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12041
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
$188.06 for 1
$188.06 ea.

Dimensions

  • Thickness: 0.3125"
  • 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-desk12041

5/16" x 6" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12042

5/16" x 6" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12042
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
$221.82 for 1
$221.82 ea.

Dimensions

  • Thickness: 0.3125"
  • 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-desk12042

5/16" x 7" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12043

5/16" x 7" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12043
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

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

QTY

Update
$259.06 for 1
$259.06 ea.

Dimensions

  • Thickness: 0.3125"
  • 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-desk12043

5/16" x 8" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12044

5/16" x 8" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12044
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
$287.75 for 1
$287.75 ea.

Dimensions

  • Thickness: 0.3125"
  • 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-desk12044

5/16" x 9" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12045

5/16" x 9" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12045
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
$293.51 for 1
$293.51 ea.

Dimensions

  • Thickness: 0.3125"
  • 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-desk12045

5/16" x 10" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12046

5/16" x 10" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12046
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
$346.85 for 1
$346.85 ea.

Dimensions

  • Thickness: 0.3125"
  • 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-desk12046

5/16" x 12" Carbon Steel Rectangle Bar 1018 Precision Ground Part # 12047

5/16" x 12" Carbon Steel Rectangle Bar 1018 Precision Ground -
Part #: 12047
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
$398.81 for 1
$398.81 ea.

Dimensions

  • Thickness: 0.3125"
  • 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-desk12047

5/16" x 3/8" Tool Steel Rectangle Bar A2 Precision Ground Part # 12048

5/16" x 3/8" Tool Steel Rectangle Bar A2 Precision Ground -
Part #: 12048
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
$67.85 for 1
$67.85 ea.

Dimensions

  • Thickness: 0.3125"
  • Width: 0.375"
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-desk12048

5/16" x 1/2" Tool Steel Rectangle Bar A2 Precision Ground Part # 12049

5/16" x 1/2" Tool Steel Rectangle Bar A2 Precision Ground -
Part #: 12049
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
$56.40 for 1
$56.40 ea.

Dimensions

  • Thickness: 0.3125"
  • Width: 0.5"
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-desk12049

5/16" x 5/8" Tool Steel Rectangle Bar A2 Precision Ground Part # 12050

5/16" x 5/8" Tool Steel Rectangle Bar A2 Precision Ground -
Part #: 12050
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
$63.45 for 1
$63.45 ea.

Dimensions

  • Thickness: 0.3125"
  • 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
View more product details Click for more details
tool-steel-rectangle-bar-a2-1superZoom-desk12050

5/16" x 3/4" Tool Steel Rectangle Bar A2 Precision Ground Part # 12051

5/16" x 3/4" Tool Steel Rectangle Bar A2 Precision Ground -
Part #: 12051
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
$67.93 for 1
$67.93 ea.

Dimensions

  • Thickness: 0.3125"
  • Width: 0.75"
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-desk12051

5/16" x 1" Tool Steel Rectangle Bar A2 Precision Ground Part # 12052

5/16" x 1" Tool Steel Rectangle Bar A2 Precision Ground -
Part #: 12052
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
$79.52 for 1
$79.52 ea.

Dimensions

  • Thickness: 0.3125"
  • Width: 1"
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-desk12052

5/16" x 1 1/4" Tool Steel Rectangle Bar A2 Precision Ground Part # 12053

5/16" x 1 1/4" Tool Steel Rectangle Bar A2 Precision Ground -
Part #: 12053
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
$89.85 for 1
$89.85 ea.

Dimensions

  • Thickness: 0.3125"
  • Width: 1.25"
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-desk12053

5/16" x 1 1/2" Tool Steel Rectangle Bar A2 Precision Ground Part # 12054

5/16" x 1 1/2" Tool Steel Rectangle Bar A2 Precision Ground -
Part #: 12054
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
$101.55 for 1
$101.55 ea.

Dimensions

  • Thickness: 0.3125"
  • Width: 1.5"
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-desk12054

5/16" x 1 3/4" Tool Steel Rectangle Bar A2 Precision Ground Part # 12055

5/16" x 1 3/4" Tool Steel Rectangle Bar A2 Precision Ground -
Part #: 12055
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
$113.13 for 1
$113.13 ea.

Dimensions

  • Thickness: 0.3125"
  • Width: 1.75"
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-desk12055

5/16" x 2" Tool Steel Rectangle Bar A2 Precision Ground Part # 12056

5/16" x 2" Tool Steel Rectangle Bar A2 Precision Ground -
Part #: 12056
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
$124.60 for 1
$124.60 ea.

Dimensions

  • Thickness: 0.3125"
  • Width: 2"
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-desk12056

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