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Tool Steel Rectangle Bar O1

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14-08-2025 - tool steel bar-rectangle o1 - 1000x1000superZoom-main

Tool Steel Rectangle Bar O1

Tool Steel Rectangle/Flat Bar O1 is an oil-hardening, general purpose tool steel that holds its size and shape with excellent accuracy when being heat treated. While not as strong or wear resistant as A-2 or D-2, it experiences significantly less distortion during the heat-treating process. O1 tool steel has deep hardening properties and fine grain structure with unusual toughness. 

 

We carry Ground Oversized O1 & Precision Ground O1 rectangle bar.

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Material Properties

Link Icon Tool Steel O1 Product Guide | Link Icon Tool Steel O1 Rectangle Bar Tolerances

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5/32" x 1 1/4" Tool Steel Rectangle Bar O1 Precision Ground Part # 11873

5/32" x 1 1/4" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 11873
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
$54.38 for 1
$54.38 ea.

Dimensions

  • Thickness: 0.1563"
  • 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
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tool-steel-rectangle-bar-o1-1superZoom-desk11873

5/32" x 1 3/4" Tool Steel Rectangle Bar O1 Precision Ground Part # 11875

5/32" x 1 3/4" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 11875
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
$68.72 for 1
$68.72 ea.

Dimensions

  • Thickness: 0.1563"
  • Width: 1.75"
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
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tool-steel-rectangle-bar-o1-1superZoom-desk11875

5/32" x 2" Tool Steel Rectangle Bar O1 Precision Ground Part # 11876

5/32" x 2" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 11876
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
$76.20 for 1
$76.20 ea.

Dimensions

  • Thickness: 0.1563"
  • Width: 2"
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
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tool-steel-rectangle-bar-o1-1superZoom-desk11876

5/32" x 1 1/2" Tool Steel Rectangle Bar O1 Precision Ground Part # 11874

5/32" x 1 1/2" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 11874
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
$61.50 for 1
$61.50 ea.

Dimensions

  • Thickness: 0.1563"
  • 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
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tool-steel-rectangle-bar-o1-1superZoom-desk11874

5/32" x 2 1/2" Tool Steel Rectangle Bar O1 Precision Ground Part # 11877

5/32" x 2 1/2" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 11877
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
$90.57 for 1
$90.57 ea.

Dimensions

  • Thickness: 0.1563"
  • Width: 2.5"
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-desk11877

5/32" x 3" Tool Steel Rectangle Bar O1 Precision Ground Part # 11878

5/32" x 3" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 11878
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
$105.13 for 1
$105.13 ea.

Dimensions

  • Thickness: 0.1563"
  • Width: 3"
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-desk11878

5/32" x 4" Tool Steel Rectangle Bar O1 Precision Ground Part # 11879

5/32" x 4" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 11879
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
$135.50 for 1
$135.50 ea.

Dimensions

  • Thickness: 0.1563"
  • Width: 4"
Click for more details
tool-steel-rectangle-bar-o1-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

MTR FREE MTR Available
View more product details View more product details
View more product details Click for more details
tool-steel-rectangle-bar-o1-1superZoom-desk11879

5/32" x 5" Tool Steel Rectangle Bar O1 Precision Ground Part # 11880

5/32" x 5" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 11880
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
$164.93 for 1
$164.93 ea.

Dimensions

  • Thickness: 0.1563"
  • Width: 5"
Click for more details
tool-steel-rectangle-bar-o1-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

MTR FREE MTR Available
View more product details View more product details
View more product details Click for more details
tool-steel-rectangle-bar-o1-1superZoom-desk11880

5/32" x 6" Tool Steel Rectangle Bar O1 Precision Ground Part # 11881

5/32" x 6" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 11881
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
$194.18 for 1
$194.18 ea.

Dimensions

  • Thickness: 0.1563"
  • 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
View more product details View more product details
View more product details Click for more details
tool-steel-rectangle-bar-o1-1superZoom-desk11881

5/32" x 8" Tool Steel Rectangle Bar O1 Precision Ground Part # 11882

5/32" x 8" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 11882
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
$289.58 for 1
$289.58 ea.

Dimensions

  • Thickness: 0.1563"
  • 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-desk11882

5/32" x 3 1/2" Tool Steel Rectangle Bar O1 Precision Ground Part # 13721

5/32" x 3 1/2" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 13721
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

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

QTY

Update
$119.73 for 1
$119.73 ea.

Dimensions

  • Thickness: 0.1563"
  • Width: 3.5"
Click for more details
tool-steel-rectangle-bar-o1-1superZoom-mob{product.code}
Material Meets These Standard(s): SAE-J-437 , 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-o1-1superZoom-desk13721

3/16" x 1/4" Tool Steel Rectangle Bar O1 Precision Ground Part # 11929

3/16" x 1/4" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 11929
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
$27.88 for 1
$27.88 ea.

Dimensions

  • Thickness: 0.1875"
  • Width: 0.25"
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-desk11929

3/16" x 3/8" Tool Steel Rectangle Bar O1 Precision Ground Part # 11931

3/16" x 3/8" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 11931
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
$31.58 for 1
$31.58 ea.

Dimensions

  • Thickness: 0.1875"
  • Width: 0.375"
Click for more details
tool-steel-rectangle-bar-o1-1superZoom-mob{product.code}
Material Meets These Standard(s): SAE-J-437 , 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-o1-1superZoom-desk11931

3/16" x 5/8" Tool Steel Rectangle Bar O1 Precision Ground Part # 11932

3/16" x 5/8" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 11932
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
$39.08 for 1
$39.08 ea.

Dimensions

  • Thickness: 0.1875"
  • Width: 0.625"
Click for more details
tool-steel-rectangle-bar-o1-1superZoom-mob{product.code}
Material Meets These Standard(s): SAE-J-437 , 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-o1-1superZoom-desk11932

3/16" x 5/16" Tool Steel Rectangle Bar O1 Precision Ground Part # 11930

3/16" x 5/16" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 11930
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
$30.25 for 1
$30.25 ea.

Dimensions

  • Thickness: 0.1875"
  • Width: 0.3125"
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-desk11930

3/16" x 3/4" Tool Steel Rectangle Bar O1 Precision Ground Part # 11933

3/16" x 3/4" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 11933
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
$41.68 for 1
$41.68 ea.

Dimensions

  • Thickness: 0.1875"
  • Width: 0.75"
Click for more details
tool-steel-rectangle-bar-o1-1superZoom-mob{product.code}
Material Meets These Standard(s): SAE-J-437 , 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-o1-1superZoom-desk11933

3/16" x 1 1/2" Tool Steel Rectangle Bar O1 Precision Ground Part # 11934

3/16" x 1 1/2" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 11934
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
$62.53 for 1
$62.53 ea.

Dimensions

  • Thickness: 0.1875"
  • Width: 1.5"
Click for more details
tool-steel-rectangle-bar-o1-1superZoom-mob{product.code}
Material Meets These Standard(s): SAE-J-437 , 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-o1-1superZoom-desk11934

3/16" x 1 3/4" Tool Steel Rectangle Bar O1 Precision Ground Part # 11935

3/16" x 1 3/4" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 11935
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
$69.57 for 1
$69.57 ea.

Dimensions

  • Thickness: 0.1875"
  • Width: 1.75"
Click for more details
tool-steel-rectangle-bar-o1-1superZoom-mob{product.code}
Material Meets These Standard(s): SAE-J-437 , 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-o1-1superZoom-desk11935

3/16" x 2" Tool Steel Rectangle Bar O1 Precision Ground Part # 11936

3/16" x 2" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 11936
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
$76.80 for 1
$76.80 ea.

Dimensions

  • Thickness: 0.1875"
  • Width: 2"
Click for more details
tool-steel-rectangle-bar-o1-1superZoom-mob{product.code}
Material Meets These Standard(s): SAE-J-437 , 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-o1-1superZoom-desk11936

3/16" x 2 1/2" Tool Steel Rectangle Bar O1 Precision Ground Part # 11937

3/16" x 2 1/2" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 11937
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
$90.93 for 1
$90.93 ea.

Dimensions

  • Thickness: 0.1875"
  • Width: 2.5"
Click for more details
tool-steel-rectangle-bar-o1-1superZoom-mob{product.code}
Material Meets These Standard(s): SAE-J-437 , 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-o1-1superZoom-desk11937

3/16" x 3" Tool Steel Rectangle Bar O1 Precision Ground Part # 11938

3/16" x 3" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 11938
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
$105.23 for 1
$105.23 ea.

Dimensions

  • Thickness: 0.1875"
  • Width: 3"
Click for more details
tool-steel-rectangle-bar-o1-1superZoom-mob{product.code}
Material Meets These Standard(s): SAE-J-437 , 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-o1-1superZoom-desk11938

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

3/16" x 3 1/2" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 11939
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

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

QTY

Update
$119.48 for 1
$119.48 ea.

Dimensions

  • Thickness: 0.1875"
  • Width: 3.5"
Click for more details
tool-steel-rectangle-bar-o1-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

MTR FREE MTR Available
View more product details View more product details
View more product details Click for more details
tool-steel-rectangle-bar-o1-1superZoom-desk11939

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

3/16" x 4" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 11940
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

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

QTY

Update
$134.67 for 1
$134.67 ea.

Dimensions

  • Thickness: 0.1875"
  • Width: 4"
Click for more details
tool-steel-rectangle-bar-o1-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

MTR FREE MTR Available
View more product details View more product details
View more product details Click for more details
tool-steel-rectangle-bar-o1-1superZoom-desk11940

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

3/16" x 5" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 11941
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

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

QTY

Update
$163.50 for 1
$163.50 ea.

Dimensions

  • Thickness: 0.1875"
  • Width: 5"
Click for more details
tool-steel-rectangle-bar-o1-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

MTR FREE MTR Available
View more product details View more product details
View more product details Click for more details
tool-steel-rectangle-bar-o1-1superZoom-desk11941

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

3/16" x 6" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 11942
Best shipping value:
Single Heat Lot Required
Why are heat lots important?
Heat lots ensure consistent metal properties, full traceability, and quality control, which are critical for precision and reliability in your projects.

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

QTY

Update
$192.20 for 1
$192.20 ea.

Dimensions

  • Thickness: 0.1875"
  • Width: 6"
Click for more details
tool-steel-rectangle-bar-o1-1superZoom-mob{product.code}
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

MTR FREE MTR Available
View more product details View more product details
View more product details Click for more details
tool-steel-rectangle-bar-o1-1superZoom-desk11942

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