Calibration Blocks | McMaster-Carr

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403 Products

Dimensional Measuring and Size Checking

Gauge Blocks

Vital for dimensional quality control, these gauge blocks are often used for precision layout, machine setup, and producing close-tolerance dies and fixtures.

Mitutoyo Gauge Block Sets
with Calibration Certificate

These sets come with a certificate of calibration traceable to NIST that states they’ve passed a test for accuracy.

Mitutoyo Gauge Block Sets

Use these Mitutoyo gauge block sets for precision layout, machine setup, and producing close-tolerance dies and fixtures.

Starrett Gauge Block Sets

Use these Starrett gauge block sets for precision layout, machine setup, and producing close-tolerance dies and fixtures.

Economy Gauge Block Sets

Use these gauge block sets for precision layout, machine setup, and producing close-tolerance dies and fixtures.

Angle Block Sets

Create and check angles with these precision-ground blocks. Each block is labeled with its angle.

Calibration Squares

Check the position of tools in your CNC machine with the highest degree of precision.

Hardness Testers

Individual Test Bars for Brinell Hardness Testers

Slide these bars into a Brinell hardness tester to determine the hardness of very hard steel.

Brinell Hardness Calibration Test Blocks

Check your hardness tester for accuracy against a block with a known hardness rating.

Rockwell Hardness Calibration Test Blocks

Make sure your hardness testers are accurately calibrated.

Durometer Hardness Test Block Sets

Confirm your durometer hardness tester is taking accurate readings.

O-Ring Durometer Hardness Testers

Test the hardness of thin and irregularly shaped plastic, rubber, and laminate parts, such as O-rings.

Setup Blocks

Use these tight-tolerance blocks as mounting bases and supports to ensure accurate angles and spacing.

Dimensional Measuring and Size Checking

Gauge Blocks

Mitutoyo Gauge Block Setswith Calibration Certificate

Mitutoyo Gauge Block Sets

Starrett Gauge Block Sets

Economy Gauge Block Sets

Angle Block Sets

Calibration Squares

Hardness Testers

Individual Test Bars for Brinell Hardness Testers

Brinell Hardness Calibration Test Blocks

Rockwell Hardness Calibration Test Blocks

Durometer Hardness Test Block Sets

O-Ring Durometer Hardness Testers

Setup Blocks

Setup Blocks

Mitutoyo Gauge Block Sets
with Calibration Certificate