Confirm a part is within your set tolerance. Set your minimum and maximum tolerance to quickly check where your part falls. They have a plain thimble that turns freely without friction or a stopping device. These micrometers rely on operator feel for accurate measurements.

Mitutoyo 523 series micrometers have tolerance pointers on the dial gage, so you can set your minimum and maximum tolerance.

With a calibration certificate traceable to NIST that says they've passed a test for accuracy, you can trust these gauges to confirm if your object's outer diameter is within tolerance. They're also known as snap gauges because they snap onto rods, shafts, and other cylindrical objects. To maintain their accuracy over time, they have a hardened steel frame and spindle that withstands flexing and temperature changes.

Attach dial indicators to measure the difference between your part’s actual diameter and the expected diameter. They also come with a calibration certificate traceable to NIST that states they’ve passed a test for accuracy.

For technical drawings and 3-D models, click on a part number.