Shop all Products
Explore OLM Rewards
Deals
Get a Quick Quote!
square-bar-large-new-min-4superZoom

Tool Steel Square Bar O1

-27 Products

Tool Steel O1 Product Guide Product   | Tool Steel O1 Square Bar Tolerances product

Tool Steel Square 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 square bar.

Sort by

Size
  • Size
  • Price:Low to High
  • Product Name: A to Z
  • Product Name: Z to A
  • Relevance
  • Price:High to Low

Close

Refine Your Results

Clear Search

Filters

Material

Production Method

seller

Shape

Can't find what you need?

Contact our experienced US-based customer service team for hard-to-source materials.


1/8" Tool Steel Square Bar O1 Precision Ground Part # 12451

1/8" Tool Steel Square Bar O1 Precision Ground -
Part #: 12451
Select a Cut Size
  • 18″ (18 in.) - $53.63 ea.
  • 36″ (3 ft.) - $88.66 ea.
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
$53.63 for 1
$53.63 ea.
Expand Details

Dimensions

  • Height: 0.125"
Click for more details tool-steel-square-bar-o1-1superZoom
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

FREE MTR AVAILABLE
View more product details
Click for more details tool-steel-square-bar-o1-1superZoom

5/32" Tool Steel Square Bar O1 Precision Ground Part # 12453

5/32" Tool Steel Square Bar O1 Precision Ground -
Part #: 12453
Select a Cut Size
  • 18″ (18 in.) - $49.70 ea.
  • 36″ (3 ft.) - $82.32 ea.
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
$49.70 for 1
$49.70 ea.
Expand Details

Dimensions

  • Height: 0.15625"
Click for more details tool-steel-square-bar-o1-1superZoom
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

FREE MTR AVAILABLE
View more product details
Click for more details tool-steel-square-bar-o1-1superZoom

3/16" Tool Steel Square Bar O1 Ground Oversize Part # 12429

3/16" Tool Steel Square Bar O1 Ground Oversize -
Part #: 12429
Select a Cut Size
  • 36″ (3 ft.) - $78.50 ea.
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
$78.50 for 1
$78.50 ea.
Expand Details

Dimensions

  • Height: 0.1875"
Click for more details tool-steel-square-bar-o1-oversize-1superZoom
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

FREE MTR AVAILABLE
View more product details
Click for more details tool-steel-square-bar-o1-oversize-1superZoom

3/16" Tool Steel Square Bar O1 Precision Ground Part # 12456

3/16" Tool Steel Square Bar O1 Precision Ground -
Part #: 12456
Select a Cut Size
  • 18″ (18 in.) - $46.60 ea.
  • 36″ (3 ft.) - $76.97 ea.
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
$46.60 for 1
$46.60 ea.
Expand Details

Dimensions

  • Height: 0.1875"
Click for more details tool-steel-square-bar-o1-1superZoom
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

FREE MTR AVAILABLE
View more product details
Click for more details tool-steel-square-bar-o1-1superZoom

7/32" Tool Steel Square Bar O1 Precision Ground Part # 12457

7/32" Tool Steel Square Bar O1 Precision Ground -
Part #: 12457
Select a Cut Size
  • 36″ (3 ft.) - $73.90 ea.
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
$73.90 for 1
$73.90 ea.
Expand Details

Dimensions

  • Height: 0.21875"
Click for more details tool-steel-square-bar-o1-1superZoom
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

FREE MTR AVAILABLE
View more product details
Click for more details tool-steel-square-bar-o1-1superZoom

1/4" Tool Steel Square Bar O1 Ground Oversize Part # 12431

1/4" Tool Steel Square Bar O1 Ground Oversize -
Part #: 12431
Select a Cut Size
  • 18″ (18 in.) - $45.65 ea.
  • 36″ (3 ft.) - $75.43 ea.
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
$45.65 for 1
$45.65 ea.
Expand Details

Dimensions

  • Height: 0.25"
Click for more details tool-steel-square-bar-o1-oversize-1superZoom
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

FREE MTR AVAILABLE
View more product details
Click for more details tool-steel-square-bar-o1-oversize-1superZoom

1/4" Tool Steel Square Bar O1 Precision Ground Part # 12460

1/4" Tool Steel Square Bar O1 Precision Ground -
Part #: 12460
Select a Cut Size
  • 18″ (18 in.) - $44.78 ea.
  • 36″ (3 ft.) - $73.97 ea.
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
$44.78 for 1
$44.78 ea.
Expand Details

Dimensions

  • Height: 0.25"
Click for more details tool-steel-square-bar-o1-1superZoom
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

FREE MTR AVAILABLE
View more product details
Click for more details tool-steel-square-bar-o1-1superZoom

9/32" Tool Steel Square Bar O1 Precision Ground Part # 12461

9/32" Tool Steel Square Bar O1 Precision Ground -
Part #: 12461
Select a Cut Size
  • 18″ (18 in.) - $46.53 ea.
  • 36″ (3 ft.) - $76.94 ea.
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
$46.53 for 1
$46.53 ea.
Expand Details

Dimensions

  • Height: 0.28125"
Click for more details tool-steel-square-bar-o1-1superZoom
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

FREE MTR AVAILABLE
View more product details
Click for more details tool-steel-square-bar-o1-1superZoom

5/16" Tool Steel Square Bar O1 Ground Oversize Part # 12433

5/16" Tool Steel Square Bar O1 Ground Oversize -
Part #: 12433
Select a Cut Size
  • 18″ (18 in.) - $49.35 ea.
  • 36″ (3 ft.) - $81.60 ea.
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
$49.35 for 1
$49.35 ea.
Expand Details

Dimensions

  • Height: 0.3125"
Click for more details tool-steel-square-bar-o1-oversize-1superZoom
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

FREE MTR AVAILABLE
View more product details
Click for more details tool-steel-square-bar-o1-oversize-1superZoom

5/16" Tool Steel Square Bar O1 Precision Ground Part # 12464

5/16" Tool Steel Square Bar O1 Precision Ground -
Part #: 12464
Select a Cut Size
  • 18″ (18 in.) - $48.28 ea.
  • 36″ (3 ft.) - $79.92 ea.
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
$48.28 for 1
$48.28 ea.
Expand Details

Dimensions

  • Height: 0.3125"
Click for more details tool-steel-square-bar-o1-1superZoom
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

FREE MTR AVAILABLE
View more product details
Click for more details tool-steel-square-bar-o1-1superZoom

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

3/8" Tool Steel Square Bar O1 Ground Oversize -
Part #: 12435
Select a Cut Size
  • 18″ (18 in.) - $62.10 ea.
  • 36″ (3 ft.) - $102.65 ea.
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
$62.10 for 1
$62.10 ea.
Expand Details

Dimensions

  • Height: 0.375"
Click for more details tool-steel-square-bar-o1-oversize-1superZoom
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

FREE MTR AVAILABLE
View more product details
Click for more details tool-steel-square-bar-o1-oversize-1superZoom

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

3/8" Tool Steel Square Bar O1 Precision Ground -
Part #: 12467
Select a Cut Size
  • 18″ (18 in.) - $60.82 ea.
  • 36″ (3 ft.) - $100.63 ea.
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.
Expand Details

Dimensions

  • Height: 0.375"
Click for more details tool-steel-square-bar-o1-1superZoom
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

FREE MTR AVAILABLE
View more product details
Click for more details tool-steel-square-bar-o1-1superZoom

7/16" Tool Steel Square Bar O1 Precision Ground Part # 12469

7/16" Tool Steel Square Bar O1 Precision Ground -
Part #: 12469
Select a Cut Size
  • 36″ (3 ft.) - $119.64 ea.
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
$119.64 for 1
$119.64 ea.
Expand Details

Dimensions

  • Height: 0.4375"
Click for more details tool-steel-square-bar-o1-1superZoom
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

FREE MTR AVAILABLE
View more product details
Click for more details tool-steel-square-bar-o1-1superZoom

1/2" Tool Steel Square Bar O1 Ground Oversize Part # 12437

1/2" Tool Steel Square Bar O1 Ground Oversize -
Part #: 12437
Select a Cut Size
  • 18″ (18 in.) - $70.90 ea.
  • 36″ (3 ft.) - $117.10 ea.
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
$70.90 for 1
$70.90 ea.
Expand Details

Dimensions

  • Height: 0.5"
Click for more details tool-steel-square-bar-o1-oversize-1superZoom
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

FREE MTR AVAILABLE
View more product details
Click for more details tool-steel-square-bar-o1-oversize-1superZoom

1/2" Tool Steel Square Bar O1 Precision Ground Part # 12472

1/2" Tool Steel Square Bar O1 Precision Ground -
Part #: 12472
Select a Cut Size
  • 18″ (18 in.) - $69.47 ea.
  • 36″ (3 ft.) - $114.84 ea.
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
$69.47 for 1
$69.47 ea.
Expand Details

Dimensions

  • Height: 0.5"
Click for more details tool-steel-square-bar-o1-1superZoom
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

FREE MTR AVAILABLE
View more product details
Click for more details tool-steel-square-bar-o1-1superZoom

9/16" Tool Steel Square Bar O1 Precision Ground Part # 12473

9/16" Tool Steel Square Bar O1 Precision Ground -
Part #: 12473
Select a Cut Size
  • 36″ (3 ft.) - $137.81 ea.
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
$137.81 for 1
$137.81 ea.
Expand Details

Dimensions

  • Height: 0.5625"
Click for more details tool-steel-square-bar-o1-1superZoom
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

FREE MTR AVAILABLE
View more product details
Click for more details tool-steel-square-bar-o1-1superZoom

5/8" Tool Steel Square Bar O1 Ground Oversize Part # 12440

5/8" Tool Steel Square Bar O1 Ground Oversize -
Part #: 12440
Select a Cut Size
  • 18″ (18 in.) - $92.73 ea.
  • 36″ (3 ft.) - $153.41 ea.
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
$92.73 for 1
$92.73 ea.
Expand Details

Dimensions

  • Height: 0.625"
Click for more details tool-steel-square-bar-o1-oversize-1superZoom
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

FREE MTR AVAILABLE
View more product details
Click for more details tool-steel-square-bar-o1-oversize-1superZoom

5/8" Tool Steel Square Bar O1 Precision Ground Part # 12476

5/8" Tool Steel Square Bar O1 Precision Ground -
Part #: 12476
Select a Cut Size
  • 18″ (18 in.) - $90.90 ea.
  • 36″ (3 ft.) - $150.43 ea.
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
$90.90 for 1
$90.90 ea.
Expand Details

Dimensions

  • Height: 0.625"
Click for more details tool-steel-square-bar-o1-1superZoom
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

FREE MTR AVAILABLE
View more product details
Click for more details tool-steel-square-bar-o1-1superZoom

3/4" Tool Steel Square Bar O1 Ground Oversize Part # 12443

3/4" Tool Steel Square Bar O1 Ground Oversize -
Part #: 12443
Select a Cut Size
  • 18″ (18 in.) - $119.53 ea.
  • 36″ (3 ft.) - $197.47 ea.
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
$119.53 for 1
$119.53 ea.
Expand Details

Dimensions

  • Height: 0.75"
Click for more details tool-steel-square-bar-o1-oversize-1superZoom
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

FREE MTR AVAILABLE
View more product details
Click for more details tool-steel-square-bar-o1-oversize-1superZoom

3/4" Tool Steel Square Bar O1 Precision Ground Part # 12479

3/4" Tool Steel Square Bar O1 Precision Ground -
Part #: 12479
Select a Cut Size
  • 18″ (18 in.) - $117.07 ea.
  • 36″ (3 ft.) - $193.58 ea.
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
$117.07 for 1
$117.07 ea.
Expand Details

Dimensions

  • Height: 0.75"
Click for more details tool-steel-square-bar-o1-1superZoom
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

FREE MTR AVAILABLE
View more product details
Click for more details tool-steel-square-bar-o1-1superZoom

7/8" Tool Steel Square Bar O1 Precision Ground Part # 12482

7/8" Tool Steel Square Bar O1 Precision Ground -
Part #: 12482
Select a Cut Size
  • 36″ (3 ft.) - $242.54 ea.
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
$242.54 for 1
$242.54 ea.
Expand Details

Dimensions

  • Height: 0.875"
Click for more details tool-steel-square-bar-o1-1superZoom
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

FREE MTR AVAILABLE
View more product details
Click for more details tool-steel-square-bar-o1-1superZoom

1" Tool Steel Square Bar O1 Ground Oversize Part # 12448

1" Tool Steel Square Bar O1 Ground Oversize -
Part #: 12448
Select a Cut Size
  • 18″ (18 in.) - $171.77 ea.
  • 36″ (3 ft.) - $283.94 ea.
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
$171.77 for 1
$171.77 ea.
Expand Details

Dimensions

  • Height: 1"
Click for more details tool-steel-square-bar-o1-oversize-1superZoom
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

FREE MTR AVAILABLE
View more product details
Click for more details tool-steel-square-bar-o1-oversize-1superZoom

1" Tool Steel Square Bar O1 Precision Ground Part # 12485

1" Tool Steel Square Bar O1 Precision Ground -
Part #: 12485
Select a Cut Size
  • 18″ (18 in.) - $168.43 ea.
  • 36″ (3 ft.) - $278.40 ea.
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
$168.43 for 1
$168.43 ea.
Expand Details

Dimensions

  • Height: 1"
Click for more details tool-steel-square-bar-o1-1superZoom
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

FREE MTR AVAILABLE
View more product details
Click for more details tool-steel-square-bar-o1-1superZoom

1 1/8" Tool Steel Square Bar O1 Precision Ground Part # 12376

1 1/8" Tool Steel Square Bar O1 Precision Ground -
Part #: 12376
Select a Cut Size
  • 36″ (3 ft.) - $296.53 ea.
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
$296.53 for 1
$296.53 ea.
Expand Details

Dimensions

  • Height: 1.125"
Click for more details tool-steel-square-bar-o1-1superZoom
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

FREE MTR AVAILABLE
View more product details
Click for more details tool-steel-square-bar-o1-1superZoom

1 1/4" Tool Steel Square Bar O1 Precision Ground Part # 12487

1 1/4" Tool Steel Square Bar O1 Precision Ground -
Part #: 12487
Select a Cut Size
  • 18″ (18 in.) - $237.08 ea.
  • 36″ (3 ft.) - $391.99 ea.
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
$237.08 for 1
$237.08 ea.
Expand Details

Dimensions

  • Height: 1.25"
Click for more details tool-steel-square-bar-o1-1superZoom
Material Meets These Standard(s): ASTM-A681 , SAE-J-437

Key Features

FREE MTR AVAILABLE
View more product details
Click for more details tool-steel-square-bar-o1-1superZoom
  • 1

Can't find what you're looking for?

Contact us for a custom quote