Ball Micrometers | McMaster-Carr

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21 Products

Micrometer Type

Digital

The most versatile and simplest-to-use micrometers

14 products

Mechanical

Your classic micrometers, balancing precision with durability

7 products

Performance

Coolant Resistant

Tightly sealed so spraying and dripping fluids won't seep in

8 products

For Use On

Curved and Flat Surfaces

Swap between two anvils to measure curved and flat surfaces

10 products

Outside Micrometers for Curved and Flat Surfaces

Swap between two anvils to measure curved and flat surfaces with the same micrometer. The straight anvil sits against flat surfaces without wiggling. The round anvil hugs curved surfaces, so you don't measure a gap.

To find your exact measurements, read the scales on the sleeve and thimble. These micrometers are free of electronic components that could break if dropped or short-circuit if wet. You don't have to replace any batteries, so they're always ready for the job.

Starrett—Precision machined and tested in the U.S. These Starrett micrometers come packaged in their iconic red case, so you'll be able to spot them on the busiest of bench tops.

Calibration Certificate—Choose these micrometers when precision measurements are required for quality control or by regulation. The certificate is traceable to NIST, so you can be confident your measurements are correct and consistent.

Friction Thimble—Control how tightly the spindle closes on your part without the risk of damaging it. You can keep extending the spindle in small increments once it reaches your workpiece but not enough to overtighten. The thimble will start to resist turning to let you know you’ve applied the right amount of pressure.

									Outside Micrometers		Outside Micrometers with Calibration Certificate
	Measuring Range	Accuracy	Measuring Increments	Thimble Type	Throat Dp.	Frame Material	Mfr. Model No.	Includes		Each		Each
Starrett


		0" to 1"	±0.0002"	0.001"	Friction	1 1/4"	Steel	220XFL-1	Flat Anvil Round Anvil	8575A61	0000000	8575A64	0000000

Digital Outside Micrometers for Pipe and Tubing

At a glance, measure the thickness of pipe and tube walls. The round anvil hugs curved surfaces, so you don't measure a gap.

With an LCD display, these micrometers give instant measurements—no need to read scales. Swap between inch and metric or set the position to zero, all with the press of a button. You don't need to reset the zero point since they retain their position when turned off, also known as absolute (ABS) positioning.

Mitutoyo—The go-to for machinists and engineers. Every part is made within a Mitutoyo automated factory and tested in-house in Japan. The spindle glides as you turn the thimble with a weighty, silky-smooth feel.

With SPC Data Output—Send measurements to a computer or data processor to store, analyze, and manage data. You'll need a data cable or SPC wireless transmitter and receiver.

Ratchet-Stop Thimble—Best for consistent, repeatable measurements. The spindle stops extending the moment it reaches your part, so it won’t overtighten. Hear and feel a satisfying click that confirms you’ve applied the right amount of pressure.

	Measuring Range		Accuracy		Measuring Increments							Outside Micrometers		Outside Micrometers with Calibration Certificate
	Inch	Metric, mm	Inch	Metric	Inch	Metric, mm	Thimble Type	Throat Dp.	Frame Material	Measuring Functions	Mfr. Model No.		Each		Each
Mitutoyo





				With SPC Data Output
				0" to 1"	0 to 25.4	±0.0001"	±0.003 mm	0.00005"	0.001	Ratchet Stop	0.984"	Cast Iron	Zero-Position Memory (ABS)	395-371-30	2339A4	0000000	2339A5	0000000
				1" to 2"	25.4 to 50.8	±0.0001"	±0.003 mm	0.00005"	0.001	Ratchet Stop	1 1/4"	Cast Iron	Zero-Position Memory (ABS)	395-372-32	2339A11	000000	———	0
				2" to 3"	50.8 to 76.2	±0.0001"	±0.003 mm	0.00005"	0.001	Ratchet Stop	1 3/4"	Cast Iron	Zero-Position Memory (ABS)	395-373-32	2339A12	000000	———	0
				3" to 4"	76.2 to 101.6	±0.00015"	±0.004 mm	0.00005"	0.001	Ratchet Stop	2 5/8"	Cast Iron	Zero-Position Memory (ABS)	395-374-32	2339A13	000000	———	0

Accessories and Replacements for Outside Micrometers

SPC Data Cables


Mitutoyo Data Out Switch B × 10-Pin Mitutoyo Connector	Mitutoyo Data Out Switch B × USB-A

USB-A Connection—Plug micrometers with SPC data output directly into your computer.

10-Pin Mitutoyo Connector—Connect micrometers with SPC data output to a Mitutoyo miniprocessor or multiplexer.

	Lg.		Each
Mitutoyo


	Mitutoyo Data Out Switch B × 10-Pin Mitutoyo Connector	40"	20395A83	000000
	Mitutoyo Data Out Switch B × 10-Pin Mitutoyo Connector	80"	20395A84	000000
	Mitutoyo Data Out Switch B × USB-A	80"	2429N2	000000

SPC Wireless Transmitters

Mitutoyo Data Out Switch B

Connection

Wirelessly send measurements from micrometers with SPC data output to your computer. You'll also need a receiver.

Electrical Connection	Mfr. Series		Each
Mitutoyo Data Out Switch B	U-WAVE-T	2424N2	0000000

SPC Wireless Receivers

Wirelessly send measurements from micrometers with SPC data output to your computer. You'll also need a transmitter.

	For Mfr. Series		Each
Mitutoyo


	USB-A	U-WAVE-T	2412N1	0000000

Replacement Cases

Image of Product. Front orientation. Mitutoyo.

		Each
Mitutoyo


	293-330-30, 293-334-30, 293-335-30, 293-340-30, 293-344-30, 293-348-30, 293-349-30, 293-831-30, 293-832-30, 395-371-30	4274N13	000000

Replacement Batteries

		Each
Replacement SR44 Silver Oxide Battery	7604K117	00000

Outside Micrometers for Pipe and Tubing

Measure the thickness of pipe and tube walls. The round anvil hugs curved surfaces, so you don't measure a gap.

To find your exact measurements, read the scales on the sleeve and thimble. You don't have to replace any batteries, so these micrometers are always ready for the job.

With Analog Display—Watch the display update as the spindle moves for easy-to-read, trustworthy measurements.

									Outside Micrometers		Outside Micrometers with Calibration Certificate
	Measuring Range	Accuracy	Measuring Increments	Thimble Type	Spindle Tip Shape	Throat Dp.	Frame Material	Mfr. Model No.		Each		Each
Mitutoyo





				With Analog Display
				0" to 1"	±0.00015"	0.0001"	Ratchet Stop	Flat	0.984"	Cast Iron	295-153	8654A11	0000000	8654A13	0000000
				0" to 1"	±0.00015"	0.0001"	Ratchet Stop	Round	0.984"	Cast Iron	295-253	8654A12	000000	8654A14	000000

Replacement Cases

		Each
Mitutoyo


	193-211, 295-153, 295-253	4274N12	000000

Digital Outside Micrometers for Curved and Flat Surfaces

Swap between two anvils to view curved and flat surface measurements with the same screen. The straight anvil sits against flat surfaces without wiggling. The round anvil hugs curved surfaces, so you don't measure a gap.

With SPC Data Output—Send measurements to a computer or data processor to store, analyze, and manage data. You'll need a data cable or SPC wireless transmitter and receiver.

	Measuring Range		Accuracy		Measuring Increments								Outside Micrometers
	Inch	Metric, mm	Inch	Metric	Inch	Metric, mm	Thimble Type	Throat Dp.	Frame Material	Enclosure Rating	Mfr. Model No.	Includes		Each
Mitutoyo





				With SPC Data Output
				0" to 1"	0 to 25.4	±0.0002"	±0.005 mm	0.00005"	0.001	Friction	1"	Cast Iron	IP65	317-351-30	Flat Anvil Round Anvil	5547N11	0000000
				1" to 2"	25.4 to 50.8	±0.0002"	±0.005 mm	0.00005"	0.001	Friction	1"	Cast Iron	IP65	317-352-30	Flat Anvil Round Anvil	5547N12	000000

Accessories and Replacements for Outside Micrometers

SPC Data Cables


Mitutoyo Data Out Switch B × 10-Pin Mitutoyo Connector	Mitutoyo Data Out Switch B × USB-A

USB-A Connection—Plug micrometers with SPC data output directly into your computer.

10-Pin Mitutoyo Connector—Connect micrometers with SPC data output to a Mitutoyo miniprocessor or multiplexer.

	Lg.		Each
Mitutoyo


	Mitutoyo Data Out Switch B × 10-Pin Mitutoyo Connector	40"	20395A83	000000
	Mitutoyo Data Out Switch B × 10-Pin Mitutoyo Connector	80"	20395A84	000000
	Mitutoyo Data Out Switch B × USB-A	80"	2429N2	000000

SPC Wireless Transmitters

Mitutoyo Data Out Switch B

Connection

Wirelessly send measurements from micrometers with SPC data output to your computer. You'll also need a receiver.

Electrical Connection	Mfr. Series		Each
Mitutoyo Data Out Switch B	U-WAVE-T	2424N2	0000000

SPC Wireless Receivers

Wirelessly send measurements from micrometers with SPC data output to your computer. You'll also need a transmitter.

	For Mfr. Series		Each
Mitutoyo


	USB-A	U-WAVE-T	2412N1	0000000

Replacement Batteries

		Each
Replacement SR44 Silver Oxide Battery	7604K117	00000