300 mm 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.

Starrett—Starrett calipers come packaged in their iconic wood or red plastic case, so you'll be able to spot them on the busiest of bench tops.

McMaster-Carr Approved—The performance of brand-name calipers without the cost.

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 12"	0 to 300	±0.0015"	±0.04 mm	0.0005"	0.01	16"	Stainless Steel	Stainless Steel	500-193-30	0000000	0000000	0000000	0000000




						With SPC Data Output

						0" to 12"	0 to 300	±0.0015"	±0.04 mm	0.0005"	0.01	16"	Stainless Steel	Stainless Steel	500-173-30	00000000	000000	00000000	000000


						Starrett







										Without SPC Data Output

										0" to 12"	0 to 300	±0.0015"	±0.04 mm	0.0005"	0.01	15 1/4"	Stainless Steel	Stainless Steel	EC799A-12/300	00000000	000000	00000000	000000


										McMaster-Carr Approved







														Without SPC Data Output

														0" to 12"	0 to 300	±0.001"	±0.02 mm	0.0005"	0.01	15 1/4"	Stainless Steel	Steel	—	0000000	000000	———	0




																With SPC Data Output and Bluetooth Connection

																0" to 12"	0 to 300	±0.0015"	±0.03 mm	0.0005"	0.01	15 1/4"	Stainless Steel	Stainless Steel	—	0000000	000000	———	0

Accessories and Replacements for Calipers

Mitutoyo Cords


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"	0000000	000000


	Mitutoyo Data Out Switch C × 10-Pin Mitutoyo Connector	80"	00000000	00000
	Mitutoyo Data Out Switch C × USB-A	80"	000000	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	000000	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	000000	0000000

	For Caliper Measurement Range
Mitutoyo


0" to 12", 0 mm to 300 mm	0000000	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	00000000	000000

	For Mfr. Model No.
Mitutoyo


500-170-30, 500-171-30, 500-172-30, 500-173-30, 500-193-30, 500-195-30, 500-196-30, 500-197-32, 573-291-30	0000000	00000

Replacement Cases


Mitutoyo	Starrett

	Material		Each
Mitutoyo



	500-173, 500-193, 500-754-10, 500-764-10, 505-746, 505-749	Plastic	0000000	000000


	Starrett



			120-12, 120Z-12, 798A-12/300, 798B-12/300, EC799A-12/300	Wood	0000000	00000

			1-9	10-49	50-Up
Replacement SR44 Silver Oxide Battery	00000000	Each	00000	00000	00000
Replacement CR2032 Lithium Battery	0000000	Pkg. of 1	0000	0000	0000

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 12"	0 to 300	±0.0015"	±0.04 mm	0.0005"	0.01	1/64"	15 3/4"	Stainless Steel	Stainless Steel	0000000	0000000

Replacement Batteries

		Each
Replacement SR44 Silver Oxide Battery	00000000	00000	00000	00000

Precision-Adjust Digital Calipers

Position the jaws exactly where you need them. The fine-adjustment wheel opens and closes the jaws in small, precise increments for extra control while measuring.

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 and Zigbee Connection—Wirelessly send measurements to an SPC receiver (sold separately) to store, analyze, and manage data on your computer.

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







			Without SPC Data Output

			0" to 12"	0 to 300	±0.002"	±0.05 mm	0.0005"	0.01	13"	Stainless Steel	Steel	000000	0000000




					With SPC Data Output and Zigbee Connection

					0" to 12"	0 to 300	±0.002"	±0.05 mm	0.0005"	0.01	17"	Stainless Steel	Stainless Steel	00000000	000000

Accessories and Replacements for Calipers

			Pkg.
Replacement CR2032 Lithium Battery	1	0000000	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.

Starrett—Starrett calipers come packaged in their iconic wood or red plastic case, so you'll be able to spot them on the busiest of bench tops.

McMaster-Carr Approved—The performance of brand-name calipers without the cost.

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.

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







				Without SPC Data Output

				0" to 12"	0 to 300	±0.0015"	±0.04 mm	0.0005"	0.01	16"	Stainless Steel	Stainless Steel	IP67	500-754-20	0000000	0000000	0000000	0000000




						With SPC Data Output

						0" to 12"	0 to 300	±0.0015"	±0.04 mm	0.0005"	0.01	16"	Stainless Steel	Stainless Steel	IP67	500-764-20	0000000	000000	0000000	000000


						Starrett







										Without SPC Data Output

										0" to 12"	0 to 300	±0.0015"	±0.04 mm	0.0005"	0.01	15 1/4"	Stainless Steel	Stainless Steel	IP67	798A-12/300	0000000	000000	0000000	000000




												With SPC Data Output

												0" to 12"	0 to 300	±0.0015"	±0.04 mm	0.0005"	0.01	15 1/4"	Stainless Steel	Stainless Steel	IP67	798B-12/300	0000000	000000	0000000	000000


												McMaster-Carr Approved







																With SPC Data Output and Bluetooth Connection

																0" to 12"	0 to 300	±0.0015"	±0.04 mm	0.0005"	0.01	15 1/4"	Stainless Steel	Stainless Steel	IP67	—	———	0	0000000	000000

Accessories and Replacements for Calipers

Mitutoyo Cords


Mitutoyo Data Out Switch A × 10-Pin Mitutoyo Connector	Mitutoyo Data Out Switch A × 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 A × 10-Pin Mitutoyo Connector	40"	00000000	0000000


	Mitutoyo Data Out Switch A × 10-Pin Mitutoyo Connector	80"	00000000	000000
	Mitutoyo Data Out Switch A × USB-A	80"	000000	000000

Starrett Cords

Straight Starrett Connector × USB-A

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

	Lg., ft.		Each
Starrett



	Straight Starrett Connector × USB-A	6	0000000	0000000

SPC Wireless Transmitters

Mitutoyo Data Out Switch A 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 A	U-WAVE-T	000000	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	000000	0000000

	For Caliper Measurement Range
Mitutoyo


0" to 12", 0 mm to 300 mm	0000000	000000

	For Mfr. Model No.
Mitutoyo


500-752-20, 500-753-20, 500-754-20, 500-762-20, 500-763-20, 500-764-20, 573-701-20, 573-705-20, 573-721-20, 573-761-20	0000000	00000

Replacement Cases


Mitutoyo	Starrett

	Material		Each
Mitutoyo



	500-173, 500-193, 500-754-10, 500-764-10, 505-746, 505-749	Plastic	0000000	000000


	Starrett



			120-12, 120Z-12, 798A-12/300, 798B-12/300, EC799A-12/300	Wood	0000000	00000

			1-9	10-49	50-Up
Replacement SR44 Silver Oxide Battery	00000000	Each	00000	00000	00000
Replacement CR2032 Lithium Battery	0000000	Pkg. of 1	0000	0000	0000

Dial Calipers

Watch the needle move as the jaws do for trustworthy measurements. To calculate your final measurement, simply add the decimal value on the dial to the number on the main scale. These calipers are battery-free, so they're always ready to use. However, the glass dial and internal components can break if accidentally dropped.

McMaster-Carr Approved—The performance of brand-name calipers without the cost.

Built-In Backlash Control—The needle stays steady even if the dial is bumped or vibrated for reliably accurate measurements.

											Calipers
	Measuring Range	Accuracy	Measuring Increments	Measurement per Dial Rev.	Overall Lg.	Body Material	Jaw Material	Mfr. Series	Features	Dial Face Color		Each
Mitutoyo



		0 mm to 300 mm	±0.04 mm	0.02 mm	2 mm	15 3/4"	Stainless Steel	Stainless Steel	505-745	Built-In Backlash Control	Yellow	00000000	0000000


		McMaster-Carr Approved



				0" to 12" 0 mm to 300 mm	±0.002" ±0.05 mm	0.001" 0.02 mm	0.1"	16"	Stainless Steel	Steel	—	Built-In Backlash Control	White	0000000	00000

Accessories and Replacements for Calipers

	For Caliper Measurement Range
Mitutoyo


0" to 12", 0 mm to 300 mm	0000000	000000

	For Mfr. Model No.	Material
Mitutoyo


500-173, 500-193, 500-754-10, 500-764-10, 505-746, 505-749	Plastic	0000000	000000

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.

	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



		0" to 12"	0 to 300	±0.0015"	±0.04 mm	0.001"	0.02	16"	Stainless Steel	Stainless Steel	530-119	0000000	0000000

Depth Base Attachments

Left-Handed Digital Calipers

The display, markings, and thumb wheel face to the right, so you can comfortably work these calipers with your left hand.

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

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







			With SPC Data Output

			0" to 12"	0 to 300	±0.0012"	±0.03 mm	0.0005"	0.01	15 3/4"	Stainless Steel	Stainless Steel	0000000	0000000

Replacement Batteries

Precision-Adjust Vernier Calipers

Move the jaws exactly where you need them. The fine-adjustment wheel opens and closes the jaws in small, precise increments for extra control while measuring.

These classic calipers use 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, they won't break when dropped or short-circuit when wet. They're battery-free, so they're always ready to use.

McMaster-Carr Approved—The performance of brand-name calipers without the cost.

	Measuring Range		Accuracy		Measuring Increments					Calipers
	Inch	Metric, mm	Inch	Metric	Inch	Metric, mm	Overall Lg.	Body Material	Jaw Material		Each
McMaster-Carr Approved



		0" to 12"	0 to 300	±0.0015"	±0.04 mm	0.001"	0.02	16"	Stainless Steel	Stainless Steel	0000000	000000

			Pkg.
	Pkg. Qty.		1-9	10-49	50-Up
Replacement CR2032 Lithium Battery	1	0000000	00000	00000	00000