8" 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.

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.

Carbide Jaw—Our longest-lasting jaws won't dull when pressed against extra-hard or abrasive surfaces, such as grinding wheels.

	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 8"	0 to 200	±0.001"	±0.025 mm	0.0005"	0.01	11 1/2"	Stainless Steel	Stainless Steel	500-197-30	8647A22	0000000	8647A81	0000000
				0" to 8"	0 to 200	±0.001"	±0.025 mm	0.0005"	0.01	11 1/2"	Stainless Steel	Carbide	500-734-20	8647A21	000000	8647A62	000000



						With SPC Data Output
						0" to 8"	0 to 200	±0.001"	±0.025 mm	0.0005"	0.01	11 1/2"	Stainless Steel	Stainless Steel	500-172-30	20925A78	000000	20925A41	000000

						Starrett





										Without SPC Data Output
										0" to 8"	0 to 200	±0.0015"	±0.04 mm	0.0005"	0.01	11 1/2"	Stainless Steel	Stainless Steel	EC799A-8/200	23175A93	000000	23175A96	000000

										Other Calipers





														Without SPC Data Output
														0" to 8"	0 to 200	±0.001"	±0.02 mm	0.0005"	0.01	11 1/4"	Stainless Steel	Steel	—	4996A73	00000	———	0



																With SPC Data Output and Bluetooth Connection
																0" to 8"	0 to 200	±0.0015"	±0.03 mm	0.0005"	0.01	11 1/4"	Stainless Steel	Stainless Steel	—	4996A63	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

Starrett

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

	Starrett


			0" to 6", 0" to 8", 0" to 9", 0 mm to 150 mm, 0 mm to 200 mm, 0 mm to 225 mm	23175A33	00000

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

Starrett

		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
	500-733-20, 500-734-20	8647A411	0000

	Starrett


			EC799A-6/150, EC799A-8/200	2260N21	00000

Replacement Cases

Mitutoyo

Starrett

	Material		Each
Mitutoyo


	500-172-30, 500-197-30, 500-475, 500-734-20, 500-753-20, 500-763-20, 500-785, 505-731, 505-737, 505-741, 505-743, 573-701-20, 573-705-20, 573-761-20	Plastic	2294N12	000000

	Starrett


			798A-8/200, 798B-8/200, EC799A-8/200	Wood	2231N11	00000

Replacement Batteries


Replacement SR44 Silver Oxide Battery	7604K117	Each	00000
Replacement CR2032 Lithium Battery	7701K34	Pkg. of 1	0000

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 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.

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.

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 8"	0 to 200	±0.001"	±0.025 mm	0.0005"	0.01	11 1/2"	Stainless Steel	Stainless Steel	IP67	500-753-20	2340A12	0000000	2340A15	0000000



						With SPC Data Output
						0" to 8"	0 to 200	±0.001"	±0.025 mm	0.0005"	0.01	11 1/2"	Stainless Steel	Stainless Steel	IP67	500-763-20	2340A26	000000	2340A29	000000

						Starrett





										Without SPC Data Output
										0" to 8"	0 to 200	±0.0015"	±0.04 mm	0.0005"	0.01	11 1/2"	Stainless Steel	Stainless Steel	IP67	798A-8/200	2368A86	000000	2368A87	000000



												With SPC Data Output
												0" to 8"	0 to 200	±0.0015"	±0.04 mm	0.0005"	0.01	11 1/2"	Stainless Steel	Stainless Steel	IP67	798B-8/200	2368A12	000000	2368A42	000000

												Other Calipers





																With SPC Data Output and Bluetooth Connection
																0" to 8"	0 to 200	±0.0015"	±0.04 mm	0.0005"	0.01	11 1/4"	Stainless Steel	Stainless Steel	IP67	—	———	0	5561N13	000000

Accessories and Replacements for Calipers

SPC Data Cables


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

Straight Starrett Connector × 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"	20395A81	0000000
	Mitutoyo Data Out Switch A × 10-Pin Mitutoyo Connector	80"	20395A82	000000
	Mitutoyo Data Out Switch A × USB-A	80"	2429N1	000000

	Starrett


			Straight Starrett Connector × USB-A	6 ft.	2501N11	000000

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	2424N1	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

Starrett

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

	Starrett


			0" to 6", 0" to 8", 0" to 9", 0 mm to 150 mm, 0 mm to 200 mm, 0 mm to 225 mm	23175A33	00000

Replacement Battery Covers

Mitutoyo

		Each
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	2306N15	00000

Replacement Cases

Mitutoyo

Starrett

	Material		Each
Mitutoyo


	500-172-30, 500-197-30, 500-475, 500-734-20, 500-753-20, 500-763-20, 500-785, 505-731, 505-737, 505-741, 505-743, 573-701-20, 573-705-20, 573-761-20	Plastic	2294N12	000000

	Starrett


			798A-8/200, 798B-8/200, EC799A-8/200	Wood	2231N11	00000

Replacement Batteries


Replacement SR44 Silver Oxide Battery	7604K117	Each	00000
Replacement CR2032 Lithium Battery	7701K34	Pkg. of 1	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 8"	0 to 200	±0.0015"	±0.04 mm	0.0005"	0.01	1/128"	11 1/4"	Stainless Steel	Stainless Steel	4996A33	000000

Replacement Batteries

	Pkg. Qty.		Pkg.
Replacement CR2032 Lithium Battery	1	7701K34	00000

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 8"	0 to 200	±0.0012"	±0.03 mm	0.0005"	0.01	11 1/4"	Stainless Steel	Stainless Steel	3698N12	0000000

Replacement Batteries

	Pkg. Qty.		Pkg.
Replacement CR2032 Lithium Battery	1	7701K34	00000

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.

Carbide Jaw—Our longest-lasting jaws won't dull when pressed against extra-hard or abrasive surfaces, such as grinding wheels.

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

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


		0" to 8"	±0.002"	0.001"	0.1"	11 1/4"	Stainless Steel	Stainless Steel	505-743	Built-In Backlash Control	White	2325A15	0000000	2325A39	0000000
		0" to 8"	±0.002"	0.001"	0.1"	11 1/4"	Stainless Steel	Carbide	505-737	Built-In Backlash Control	White	2325A76	000000	2325A88	000000
		0" to 8"	±0.002"	0.001"	0.2"	11 1/4"	Stainless Steel	Stainless Steel	505-741	Built-In Backlash Control	White	2325A58	000000	2325A92	000000

		Other Calipers


				0" to 8"	±0.001"	0.001"	0.1"	11 1/2"	Stainless Steel	Steel	—	Built-In Backlash Control	White	2289A91	00000	———	0

Accessories and Replacements for Calipers

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

Replacement Cases

Mitutoyo

	Material		Each
Mitutoyo


	500-172-30, 500-197-30, 500-475, 500-734-20, 500-753-20, 500-763-20, 500-785, 505-731, 505-737, 505-741, 505-743, 573-701-20, 573-705-20, 573-761-20	Plastic	2294N12	000000

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.

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


	0" to 8"	0 to 200	±0.0015"	±0.04 mm	0.001"	0.02	11 1/2"	Stainless Steel	Stainless Steel	2272A23	000000

Self-Locking Vernier Calipers

Prevent the jaws from creeping forward or backward as you measure. They move only when you press a button, then lock in place when you let go. The button falls naturally under your thumb, so you can operate these calipers comfortably with one hand.

	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 8"	0 to 200	±0.0012"	±0.03 mm	0.001"	0.02	11 1/4"	Stainless Steel	Stainless Steel	531-129	2064A31	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