Calibration Bars | McMaster-Carr

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Accuracy Certificate Traceable to NIST

Calibration Certificate Traceable to NIST

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Compliant with Exemptions

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DFARS Specialty Metals

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U.S.–Mexico–Canada Agreement (USMCA) Qualifying

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Rockwell Hardness Scale

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Hole Style

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For Durometer Shore

807 Products

Measuring and Inspecting

Hardness Calibration Test Blocks

Confirm testers are accurate for a specific Rockwell or Brinell hardness

13 products

Hardness Testers

Determine the Rockwell, Brinell, or Durometer hardness of any material

4 products

Gauge Blocks

Confirm dies, fixtures, and other workpieces meet precise tolerances and calibrate measuring tools

738 products

Bore Gauge Calibrators

Set and check the accuracy of two-point bore gauges

1 product

Height Gauge Calibrators

Ensure height gauges are accurate

11 products

Inspection Parallels

Line up workpieces for precise machining, or support them at a level height for inspecting

8 products

Inspection Setup Blocks

Line up workpieces at precise heights and angles for machining, measuring, and inspecting

2 products

Fabricating and Machining

Setup Blocks

Use as mounting bases and supports to ensure accurate angles and spacing

31 products