4" Calipers | McMaster-Carr

The most precise and versatile calipers. Their LCD display gives instant measurements down to 0.0005”—no need to count graduations. 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.

Our calipers come with a signed certificate of inspection, so you can trust your measurements are accurate every time. Their precision-ground jaws glide up and down the body for a silky-smooth feel.

Mitutoyo—The go-to for machinists and engineers. Every part of these calipers is made within Mitutoyo's automated system and tested in-house in Japan. Their jaws are laser cut to exact dimensions for the most reliable measurements.

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.

With SPC Data Output and Bluetooth Connection—Wirelessly send measurements to your smartphone and other Bluetooth devices to store, analyze, and manage data.

Calibration Certificate—Choose these calipers 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.

	Measuring Range		Accuracy		Measuring Increments						Calipers		Calipers with Calibration Certificate
	Inch	Metric, mm	Inch	Metric	Inch	Metric, mm	Overall Lg.	Body Material	Jaw Material	Mfr. Model No.		Each		Each
Mitutoyo





				Without SPC Data Output

				0" to 4"	0 to 100	±0.001"	±0.025 mm	0.0005"	0.01	7 1/4"	Stainless Steel	Stainless Steel	500-195-30	8647A51	0000000	8647A82	0000000




						With SPC Data Output

						0" to 4"	0 to 100	±0.001"	±0.025 mm	0.0005"	0.01	7 1/4"	Stainless Steel	Stainless Steel	500-170-30	20925A76	000000	20925A75	000000


						Other Calipers





										Without SPC Data Output

										0" to 4"	0 to 100	±0.001"	±0.02 mm	0.0005"	0.01	7 1/4"	Stainless Steel	Steel	—	4996A71	00000	———	0




												With SPC Data Output and Bluetooth Connection

												0" to 4"	0 to 100	±0.001"	±0.02 mm	0.0005"	0.01	7 1/4"	Stainless Steel	Stainless Steel	—	4996A61	00000	———	0

Accessories and Replacements for Calipers

SPC Data Cables


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

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

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

	Lg.		Each
Mitutoyo



	Mitutoyo Data Out Switch C × 10-Pin Mitutoyo Connector	40"	20395A7	000000
	Mitutoyo Data Out Switch C × 10-Pin Mitutoyo Connector	80"	20395A75	00000
	Mitutoyo Data Out Switch C × USB-A	80"	2429N3	000000

SPC Wireless Transmitters

Mitutoyo Data Out Switch C Connection

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

Electrical Connection	Mfr. Series		Each
Mitutoyo Data Out Switch C	U-WAVE-T	2424N3	0000000

SPC Wireless Receivers

Wirelessly send measurements from calipers 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

Depth Base Attachments

Mitutoyo

Clamp onto the end of your caliper to steady it while measuring depth.

		Each
Mitutoyo



	0" to 4", 0" to 6", 0" to 8", 0 mm to 100 mm, 0 mm to 150 mm, 0 mm to 200 mm	2325A45	000000

Display Freeze Adapters

Save your measurement on the display even after repositioning the caliper.

		Each
Mitutoyo



	500-170-30, 500-171-30, 500-172-30, 500-173, 500-505-10, 500-506-10, 500-507-10, 572-210-30, 572-211-20, 572-213-10	20925A71	000000

Replacement Battery Covers

Mitutoyo

		Each
Mitutoyo



	500-170-30, 500-171-30, 500-172-30, 500-173-30, 500-193-30, 500-195-30, 500-196-30, 500-197-30, 573-291-30	2306N11	00000

Replacement Cases

Mitutoyo

	Material		Each
Mitutoyo



	500-170-30, 500-171-30, 500-195-30, 500-196-30, 500-474, 500-733-20, 500-752-20, 500-762-20, 500-784, 505-730, 505-738, 505-740, 505-741, 505-742, 573-721-20	Plastic	2294N11	000000

Replacement Batteries

			1-9	10-49	50-Up
Replacement SR44 Silver Oxide Battery	7604K117	Each	00000	00000	00000
Replacement CR2032 Lithium Battery	7701K34	Pkg. of 1	0000	0000	0000

Vernier Calipers

Your traditional calipers, combining precision and durability. This classic design uses a sliding vernier scale. Just add the measurement from the main scale to the measurement on the vernier scale to get accurate readings as small as 0.001". Made completely out of metal, these calipers won't break when dropped or short-circuit when wet. They're battery-free, so they're always ready to use.

						Calipers
Measuring Range	Accuracy	Measuring Increments	Overall Lg.	Body Material	Jaw Material		Each



	0" to 4"	±0.001"	0.001"	6 3/16"	Stainless Steel	Stainless Steel	2192A22	000000

Digital Calipers with Fractional Display

Convert measurements to fractions with the push of a button. These calipers measure in both decimals and fractions of an inch, so you don't need to memorize conversions. They're especially handy for carpentry and similar jobs that involve measurements down to _1/64".

With an LCD display, these calipers give instant measurements—no need to count graduations. Swap between inch and metric or set the position to zero, all with the press of a button.

	Measuring Range		Accuracy		Measuring Increments
	Inch	Metric, mm	Inch	Metric	Inch	Metric, mm	Fractional Increments	Overall Lg.	Body Material	Jaw Material		Each
Without SPC Data Output



		0" to 4"	0 to 100	±0.001"	±0.025 mm	0.0005"	0.01	1/128"	7 1/4"	Stainless Steel	Stainless Steel	4996A32	000000

Replacement Batteries

			Pkg.
	Pkg. Qty.		1-9	10-49	50-Up
Replacement CR2032 Lithium Battery	1	7701K34	00000	00000	00000

Pocket Slide Ruler Calipers

No longer than a pencil for quick measurements on the go. Made entirely of metal, these calipers won't break if dropped or short-circuit if rinsed or rained on.

Measuring Range		Accuracy		Measuring Increments						Calipers
Inch	Metric, mm	Inch	Metric	Inch	Metric, mm	Fractional Increments	Overall Lg.	Body Material	Jaw Material		Each



	0" to 4"	—	±0.0312"	—	0.0625"	—	1/32"	6"	Stainless Steel	Stainless Steel	2287A21	000000
	0" to 4"	0 to 100	±0.03125"	±0.80 mm	0.03125"	1	1/32"	4 1/2"	Brass	Brass	2287A23	00000

Calipers for Tolerance Checking

Quickly check that parts are within tolerance without adjusting the jaws each time. The jaws have a spring-loaded lock, so they stay at your set measurement. Pull the thumb wheel to open them just enough to slide a part in or out. Release and they snap back to their set position.

With an LCD display, these calipers give instant measurements—no need to count graduations. 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.

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						Calipers
	Inch	Metric, mm	Inch	Metric	Inch	Metric, mm	Overall Lg.	Body Material	Jaw Material	Mfr. Model No.		Each
Mitutoyo





				With SPC Data Output

				0" to 4"	0 to 100	±0.001"	±0.025 mm	0.0005"	0.01	9 1/4"	Stainless Steel	Stainless Steel	573-281-30	7711N11	0000000

Accessories and Replacements for Calipers

SPC Data Cables


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

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

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

	Lg.		Each
Mitutoyo



	Mitutoyo Data Out Switch C × 10-Pin Mitutoyo Connector	40"	20395A7	000000
	Mitutoyo Data Out Switch C × 10-Pin Mitutoyo Connector	80"	20395A75	00000
	Mitutoyo Data Out Switch C × USB-A	80"	2429N3	000000

SPC Wireless Transmitters

Mitutoyo Data Out Switch C Connection

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

Electrical Connection	Mfr. Series		Each
Mitutoyo Data Out Switch C	U-WAVE-T	2424N3	0000000

SPC Wireless Receivers

Wirelessly send measurements from calipers 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

Depth Base Attachments

Mitutoyo

Clamp onto the end of your caliper to steady it while measuring depth.

		Each
Mitutoyo



	0" to 4", 0" to 6", 0" to 8", 0 mm to 100 mm, 0 mm to 150 mm, 0 mm to 200 mm	2325A45	000000

Display Freeze Adapters

Save your measurement on the display even after repositioning the caliper.

		Each
Mitutoyo



	500-170-30, 500-171-30, 500-172-30, 500-173, 500-505-10, 500-506-10, 500-507-10, 572-210-30, 572-211-20, 572-213-10	20925A71	000000

Replacement Batteries

		Each
		1-9	10-49	50-Up
Replacement SR44 Silver Oxide Battery	7604K117	00000	00000	00000

Coolant-Resistant Digital Calipers

Measure parts inside CNC machines and other places coated with coolant and cutting oil. The display and battery cover are tightly sealed, so spraying and dripping fluids won't seep in.

With SPC Data Output and Bluetooth Connection—Wirelessly send measurements to your smartphone and other Bluetooth devices to store, analyze, and manage data.

Measuring Range		Accuracy		Measuring Increments						Calipers with Calibration Certificate
Inch	Metric, mm	Inch	Metric	Inch	Metric, mm	Overall Lg.	Body Material	Jaw Material	Enclosure Rating		Each





			With SPC Data Output and Bluetooth Connection

			0" to 4"	0 to 100	±0.001"	±0.02 mm	0.0005"	0.01	7 1/4"	Stainless Steel	Stainless Steel	IP67	5561N11	0000000

Replacement Batteries

			Pkg.
	Pkg. Qty.		1-9	10-49	50-Up
Replacement CR2032 Lithium Battery	1	7701K34	00000	00000	00000

Wide-Range Outside Micrometers

No need to lug around a case of micrometers—just switch out the anvil to measure parts of different sizes.

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.

Ratchet 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.

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



		0" to 4"	±0.00015"	0.001"	Ratchet	2 1/2"	Cast Iron	224AARLZ	Four Anvils Three Calibration Rods	8597A31	0000000

Coolant-Resistant Digital Outside Micrometer Sets

Keep a collection of digital micrometers handy to measure parts of different sizes. These micrometers come in a convenient case to store and organize them in one place. They're a must-have for machine shops—each display and battery cover is tightly sealed, so spraying and dripping coolant won't seep in.

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.

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		Measuring Increments
No. of Micrometers	Includes	Inch	Metric, mm	Inch	Metric, mm	Thimble Type	Frame Material	Enclosure Rating		Each





			With SPC Data Output

			4	One Micrometer (0"-1" Measuring Range, ±0.00015" Measuring Accuracy) One Micrometer (1"-2" Measuring Range, ±0.00015" Measuring Accuracy) One Micrometer (2"-3" Measuring Range, ±0.0005" Measuring Accuracy) One Micrometer (3"-4" Measuring Range, ±0.0005" Measuring Accuracy)	0" to 4"	0 to 100	0.00005"	0.001	Ratchet	Steel	IP65	5698N12	0000000

Replacement Batteries

			Pkg.
	Pkg. Qty.		1-9	10-49	50-Up
Replacement CR2032 Lithium Battery	1	7701K34	00000	00000	00000