18" 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.

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 18"	0 to 450	±0.002"	±0.05 mm	0.0005"	0.01	24 3/4"	Stainless Steel	Stainless Steel	500-505-10	20925A91	0000000	20925A94	000000000

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"	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 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 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



	500-170-32, 500-171-32, 500-172-32, 500-173, 500-505-10, 500-506-10, 500-507-10, 572-210-30, 572-211-20, 572-213-10	20925A71	000000

	For Mfr. Model No.
Mitutoyo


500-505-10, 500-506-10	2306N13	00000

	For Mfr. Model No.	Material
Mitutoyo


500-505-10	Plastic	2294N14	000000

		Each
Replacement SR44 Silver Oxide Battery	7604K117	00000	00000	00000

Large-Job Slide Ruler Calipers

Our deepest jaws for measuring extra-large, round objects, such as shafts, poles, and logs. Don’t let the size of these calipers deter you—their aluminum body makes them light enough to comfortably carry around.

	Accuracy	Measuring Increments	Overall Lg.	Body Material	Jaw Material	Jaw Dp.		Each
Inch



	0" to 18"	±0.100"	0.1"	28"	Aluminum	Aluminum	11 1/2"	19185A21	0000000

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 18"	0 to 450	±0.002"	±0.05 mm	0.001"	0.02	24 3/4"	Stainless Steel	Stainless Steel	160-151	8619A81	0000000

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.