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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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1/4" x 1 1/4" Tool Steel Rectangle Bar O1 Precision Ground Part # 12005

1/4" x 1 1/4" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12005
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
$65.53 for 1
$65.53 ea.

Dimensions

  • Thickness: 0.25"
  • 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-desk12005

1/4" x 2 1/2" Tool Steel Rectangle Bar O1 Precision Ground Part # 12009

1/4" x 2 1/2" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12009
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
$106.30 for 1
$106.30 ea.

Dimensions

  • Thickness: 0.25"
  • 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
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tool-steel-rectangle-bar-o1-1superZoom-desk12009

1/4" x 3 1/2" Tool Steel Rectangle Bar O1 Precision Ground Part # 12011

1/4" x 3 1/2" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12011
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
$139.00 for 1
$139.00 ea.

Dimensions

  • Thickness: 0.25"
  • 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
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tool-steel-rectangle-bar-o1-1superZoom-desk12011

1/4" x 4" Tool Steel Rectangle Bar O1 Precision Ground Part # 12012

1/4" x 4" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12012
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
$155.33 for 1
$155.33 ea.

Dimensions

  • Thickness: 0.25"
  • 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
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tool-steel-rectangle-bar-o1-1superZoom-desk12012

1/4" x 3" Tool Steel Rectangle Bar O1 Precision Ground Part # 12010

1/4" x 3" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12010
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
$122.63 for 1
$122.63 ea.

Dimensions

  • Thickness: 0.25"
  • 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-desk12010

1/4" x 4 1/2" Tool Steel Rectangle Bar O1 Precision Ground Part # 12013

1/4" x 4 1/2" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12013
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
$171.50 for 1
$171.50 ea.

Dimensions

  • Thickness: 0.25"
  • Width: 4.5"
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-desk12013

1/4" x 5" Tool Steel Rectangle Bar O1 Precision Ground Part # 12014

1/4" x 5" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12014
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
$187.80 for 1
$187.80 ea.

Dimensions

  • Thickness: 0.25"
  • 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-desk12014

1/4" x 5 1/2" Tool Steel Rectangle Bar O1 Precision Ground Part # 12015

1/4" x 5 1/2" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12015
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
$204.18 for 1
$204.18 ea.

Dimensions

  • Thickness: 0.25"
  • Width: 5.5"
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-desk12015

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
View more product details View more product details
View more product details Click for more details
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
View more product details View more product details
View more product details Click for more details
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

9/32" x 3/4" Tool Steel Rectangle Bar O1 Precision Ground Part # 12023

9/32" x 3/4" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12023
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
$57.40 for 1
$57.40 ea.

Dimensions

  • Thickness: 0.2813"
  • 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-desk12023

9/32" x 1" Tool Steel Rectangle Bar O1 Precision Ground Part # 12024

9/32" x 1" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12024
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
$66.83 for 1
$66.83 ea.

Dimensions

  • Thickness: 0.2813"
  • 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-desk12024

9/32" x 1/2" Tool Steel Rectangle Bar O1 Precision Ground Part # 12022

9/32" x 1/2" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12022
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
$48.22 for 1
$48.22 ea.

Dimensions

  • Thickness: 0.2813"
  • 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-desk12022

9/32" x 1 1/4" Tool Steel Rectangle Bar O1 Precision Ground Part # 12025

9/32" x 1 1/4" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12025
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
$75.20 for 1
$75.20 ea.

Dimensions

  • Thickness: 0.2813"
  • 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-desk12025

9/32" x 1 1/2" Tool Steel Rectangle Bar O1 Precision Ground Part # 12026

9/32" x 1 1/2" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12026
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
$84.63 for 1
$84.63 ea.

Dimensions

  • Thickness: 0.2813"
  • 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-desk12026

9/32" x 2" Tool Steel Rectangle Bar O1 Precision Ground Part # 12027

9/32" x 2" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12027
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
$102.98 for 1
$102.98 ea.

Dimensions

  • Thickness: 0.2813"
  • 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
View more product details Click for more details
tool-steel-rectangle-bar-o1-1superZoom-desk12027

9/32" x 3" Tool Steel Rectangle Bar O1 Precision Ground Part # 12028

9/32" x 3" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12028
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
$139.95 for 1
$139.95 ea.

Dimensions

  • Thickness: 0.2813"
  • 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-desk12028

9/32" x 4" Tool Steel Rectangle Bar O1 Precision Ground Part # 12029

9/32" x 4" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12029
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
$176.80 for 1
$176.80 ea.

Dimensions

  • Thickness: 0.2813"
  • 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-desk12029

9/32" x 6" Tool Steel Rectangle Bar O1 Precision Ground Part # 12030

9/32" x 6" Tool Steel Rectangle Bar O1 Precision Ground -
Part #: 12030
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
$250.43 for 1
$250.43 ea.

Dimensions

  • Thickness: 0.2813"
  • 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-desk12030

5/16" x 1/2" Tool Steel Rectangle Bar O1 Ground Oversize Part # 11371

5/16" x 1/2" Tool Steel Rectangle Bar O1 Ground Oversize -
Part #: 11371
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
$51.03 for 1
$51.03 ea.

Dimensions

  • Thickness: 0.3125"
  • Width: 0.5"
Click for more details
tool-steel-rectangle-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-rectangle-bar-o1-oversize-1superZoom-desk11371

5/16" x 3/4" Tool Steel Rectangle Bar O1 Ground Oversize Part # 11372

5/16" x 3/4" Tool Steel Rectangle Bar O1 Ground Oversize -
Part #: 11372
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
$60.82 for 1
$60.82 ea.

Dimensions

  • Thickness: 0.3125"
  • Width: 0.75"
Click for more details
tool-steel-rectangle-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-rectangle-bar-o1-oversize-1superZoom-desk11372

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