40" 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.

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





				With SPC Data Output
				0" to 40"	0 to 1,000	±0.003"	±0.08 mm	0.0005"	0.01	48 3/4"	Stainless Steel	Stainless Steel	500-507-10	20925A93	000000000	20925A95	000000000

				Starrett





								Without SPC Data Output
								0" to 40"	0 to 1,000	±0.003"	±0.07 mm	0.0005"	0.01	47 1/4"	Stainless Steel	Stainless Steel	799AZ-40/1000	23175A85	00000000	23175A11	00000000

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

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


	500-507-10	2306N14	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.

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.

Carbon Fiber Body—Despite their large size, these calipers are light enough to comfortably carry around the job.

	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





				With SPC Data Output
				0" to 40"	0 to 1,000	±0.002"	±0.05 mm	0.0005"	0.01	48 1/2"	Carbon Fiber	Stainless Steel	IP66	552-314-10	20575A77	000000000	20575A72	000000000

				Other Calipers





								With SPC Data Output
								0" to 40"	0 to 1,000	±0.003"	±0.08 mm	0.0005"	0.01	49"	Carbon Fiber	Stainless Steel	IP65	—	2099A102	000000	———	0

Accessories and Replacements for Calipers

SPC Data Cables


Mitutoyo Data Out Switch A × 10-Pin Mitutoyo Connector	Mitutoyo Data Out Switch A × USB-A	5-Pin SPC 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

	Other


			5-Pin SPC Connector × USB-A	7 1/2 ft.	2099A104	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

Replacement Battery Covers

Mitutoyo

		Each
Mitutoyo


	552-313-10, 552-314-10, 552-315-10	2306N16	00000

Replacement Batteries


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

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.

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 40"	0 to 1,000	±0.004"	±0.10 mm	0.0005"	0.01	42"	Stainless Steel	Steel	2099A12	0000000

Replacement Batteries

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

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	Mfr. Model No.		Each
Mitutoyo


		0" to 40"	0 to 1,000	±0.003"	±0.07 mm	0.001"	0.02	48 3/4"	Stainless Steel	Stainless Steel	160-155	8619A85	000000000