3" Calipers | McMaster-Carr

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8 Products

Economy Slide Ruler Calipers

Take inside and outside measurements by moving the jaw along the ruler.

Measuring Range		Min. Inside Measuring Lg.		Accuracy		Measuring Increments
Inch	Metric	Inch	Metric	Inch	Metric	Inch	Metric	Fractional Increments	Overall Lg.	Body Material	Jaw Material	Jaw Dp.		Each
0"-3"	0 mm-76 mm	3/16"	5 mm	±0.0312"	±0.800 mm	0.03125"	1 mm	1/32"	4 3/4"	Stainless Steel	Stainless Steel	3/4"	0000000	000000

Mitutoyo Electronic Outside Micrometer Sets

A screen makes measurements easy to read. The micrometers in these sets have a speeder knob that reduces the time it takes to open and close around your part. To prevent overtightening, they have a ratchet-stop thimble that keeps the spindle from turning once it reaches your part. You'll still be able to turn the speeder knob, but it will click instead of tighten. Use them in machine shops where it’s dusty, wet, or exposed to coolant because they’re IP65 rated.

All have zero-position memory, also known as absolute (ABS) positioning, which retains the measuring position when the micrometer is off. A zero-set button lets you start measuring at any point.

Ratchet-Stop Thimble
Number of Micrometers	Measuring Range	Measuring Increments	Frame Material	Batteries Included	Includes	Features	Manufacturer Model Number		Each
3	0"-3" 0 mm-76.2 mm	0.00005" 0.001 mm	Steel	Yes	One Micrometer (0"-1" Measuring Range, ±0.00005" Measuring Accuracy), One Micrometer (1"-2" Measuring Range, ±0.00005" Measuring Accuracy), One Micrometer (2"-3" Measuring Range, ±0.00005" Measuring Accuracy)	Zero-Position Memory (ABS), Zero-Set Button	293-960-30	0000000	0000000

Economy Outside Micrometer Sets

Three Micrometer Set

Micrometers with different measuring ranges come in each set. Each micrometer has a ratchet-stop thimble with a speeder knob to reduce the time it takes to open and close the micrometer. A constant-force mechanism stops the micrometer’s spindle from tightening once it contacts the surface of the measured object. This ensures repeatable measurements and prevents over-tightening. When the spindle stops tightening, the thimble stops turning, but the speeder knob will continue turning with a clicking sound.

Ratchet-Stop Thimble
Number of Micrometers	Measuring Range	Measuring Increments	Frame Material	Includes		Each
3	0"-3"	0.0001"	Steel	One Micrometer (0"-1" Measuring Range, ±0.00016" Measuring Accuracy) One Micrometer (1"-2" Measuring Range, ±0.00016" Measuring Accuracy) One Micrometer (2"-3" Measuring Range, ±0.0002" Measuring Accuracy)	0000000	0000000

Mitutoyo Outside Micrometer Sets

Three Micrometer Set

Each set includes micrometers with different measuring ranges. The micrometers have a thimble with a constant-force mechanism, so that once the spindle contacts the surface of the measured object, it will stop tightening. This ensures repeatable measurements and prevents over-tightening.

Friction thimbles continue to turn with resistance when the micrometer’s spindle stops tightening.

Ratchet-stop thimbles have a speeder knob to reduce the time it takes to open and close the micrometer. When the spindle stops tightening, the thimble stops turning, but the speeder knob will continue turning with a clicking sound.

Inch
Number of Micrometers	Measuring Range	Measuring Increments	Frame Material	Includes	Features	Manufacturer Model Number		Each
3	0"-3"	0.0001"	Cast Iron	One Micrometer (0"-1" Measuring Range, ±0.0001" Measuring Accuracy, Friction Thimble), One Micrometer (1"-2" Measuring Range, ±0.0001" Measuring Accuracy, Friction Thimble), One Micrometer (2"-3" Measuring Range, ±0.0001" Measuring Accuracy, Ratchet-Stop Thimble)	Vernier Scale	103-922	00000000	0000000

Starrett Outside Micrometer Sets

Three Micrometer Set

Sets contain micrometers with different measuring ranges. Each micrometer has a ratchet-stop thimble with a speeder knob to reduce the time it takes to open and close the micrometer. The thimble has a constant-force mechanism, so that once the spindle contacts the surface of the measured object, it will stop tightening. This ensures repeatable measurements and prevents over-tightening. When the spindle stops tightening, the thimble stops turning, but the speeder knob will continue turning with a clicking sound.

Ratchet-Stop Thimble
Number of Micrometers	Measuring Range	Accuracy	Measuring Increments	Frame Material	Includes	Features	Manufacturer Model Number		Each
3	0"-3"	±0.00005"	0.0001"	Steel	One Micrometer (0"-1" Measuring Range) One Micrometer (1"-2" Measuring Range) One Micrometer (2"-3" Measuring Range)	Vernier Scale	ST436.1AXRLZ	00000000	0000000

Starrett Outside Micrometer Sets with Calibration Certificate

Three Micrometer Set

Each micrometer in these sets comes with a calibration certificate traceable to NIST that states it has passed a test for accuracy. Sets contain micrometers with different measuring ranges. The micrometers have a ratchet-stop thimble with a speeder knob to reduce the time it takes to open and close the micrometer. The thimble has a constant-force mechanism, so that once the spindle contacts the surface of the measured object, it will stop tightening. This ensures repeatable measurements and prevents over-tightening. When the spindle stops tightening, the thimble stops turning, but the speeder knob will continue turning with a clicking sound.

Ratchet-Stop Thimble
Number of Micrometers	Measuring Range	Accuracy	Measuring Increments	Frame Material	Includes	Features	Manufacturer Model Number		Each
3	0"-3"	±0.00005"	0.0001"	Steel	One Micrometer (0"-1" Measuring Range) One Micrometer (1"-2" Measuring Range) One Micrometer (2"-3" Measuring Range)	Vernier Scale	ST436.1AXRLZ	0000000	0000000

Economy Electronic Outside Micrometer Sets

Three Micrometer Set

Easily read measurements displayed on the screen. The micrometers in these sets have ratchet thimbles, which continue turning with an audible clicking sound once the spindle reaches your part. This prevents over-tightening. They also have a speeder knob to reduce the time it takes to open and close the micrometer. Use them in machine shops where it’s dusty, wet, or exposed to coolant because they’re IP rated.

All have zero-position memory, also known as absolute (ABS) positioning, which retains the measuring position when the micrometer is off. A zero-set button lets you start measuring at any point.

	Measuring Range		Measuring Increments
Number of Micrometers	Inch	Metric	Inch	Metric	Frame Material	Thimble Type	Batteries Included	Environmental Rating	Features	Includes		Each
3	0"-3"	0 mm-75 mm	0.00005"	0.001 mm	Steel	Ratchet	Yes	IP65	Zero-Position Memory (ABS), Zero-Set Button	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)	0000000	0000000

Mitutoyo Outside Micrometer Sets with Calibration Certificate

Three Micrometer Set

Each micrometer in these sets comes with a calibration certificate traceable to NIST that states it has passed a test for accuracy. Sets contain micrometers with different measuring ranges. The micrometers have a thimble with a constant-force mechanism, so that once the spindle contacts the surface of the measured object, it will stop tightening. This ensures repeatable measurements and prevents over-tightening.

Friction thimbles continue to turn with resistance when the micrometer’s spindle stops tightening.

Number of Micrometers	Measuring Range	Measuring Increments	Frame Material	Includes	Features	Manufacturer Model Number		Each
3	0"-3"	0.0001"	Cast Iron	One Micrometer (0"-1" Measuring Range, ±0.0001" Measuring Accuracy, Friction Thimble), One Micrometer (1"-2" Measuring Range, ±0.0001" Measuring Accuracy, Friction Thimble), One Micrometer (2"-3" Measuring Range, ±0.0001" Measuring Accuracy, Ratchet-Stop Thimble)	Vernier Scale	103-922	00000000	0000000