Class ZZ Gauge Pins | McMaster-Carr

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82 Products

Wear-Recognition Go Plug Gauges

A black-oxide treatment on these go gauges shows wear patterns so you can tell when you need to calibrate or replace the gauge—use them to check to minimum hole diameter. They help you measure hole sizes and depths, check hole location and distance, and set micrometers. All come with a certificate of accuracy traceable to NIST that states they’ve passed a test for accuracy.

If a go gauge can enter the hole and a no-go gauge is unable to enter, the hole is within tolerance.

For technical drawings and 3-D models, click on a part number.

Class ZZ
Choose a Size	Increment	Gauge Tolerance	Length	Surface Smoothness (RMS), microinch	Hardness	Material		Each
0.0110" to 0.0605"	0.0005"	0" to 0.0002"	2"	10	Rockwell C60	Black-Oxide Tool Steel	00000000	00000
0.0610" to 0.5005"	0.0005"	0" to 0.0002"	2"	10	Rockwell C60	Black-Oxide Tool Steel	00000000	0000
0.5010" to 0.6255"	0.0005"	0" to 0.0002"	2"	10	Rockwell C60	Black-Oxide Tool Steel	00000000	0000
0.6260" to 0.7505"	0.0005"	0" to 0.0002"	2"	10	Rockwell C60	Black-Oxide Tool Steel	00000000	0000

Wear-Recognition No-Go Plug Gauges

The black-oxide treatment on these no-go gauges shows wear patterns so you can tell when you need to calibrate or replace the gauge—they help you check the maximum hole diameter. Use them to measure hole sizes and depths, check hole location and distance, and set micrometers. They come with a certificate of accuracy traceable to NIST that states they’ve passed a test for accuracy.

If a no-go gauge is unable to enter the hole and a go gauge can, the hole is within tolerance.

For technical drawings and 3-D models, click on a part number.

Class ZZ
Choose a Size	Increment	Gauge Tolerance	Length	Surface Smoothness (RMS), microinch	Hardness	Material		Each
0.0110" to 0.0605"	0.0005"	-0.0002" to 0"	2"	10	Rockwell C60	Black-Oxide Tool Steel	00000000	00000
0.0610" to 0.5005"	0.0005"	-0.0002" to 0"	2"	10	Rockwell C60	Black-Oxide Tool Steel	00000000	0000
0.5010" to 0.6255"	0.0005"	-0.0002" to 0"	2"	10	Rockwell C60	Black-Oxide Tool Steel	00000000	0000
0.6260" to 0.7505"	0.0005"	-0.0002" to 0"	2"	10	Rockwell C60	Black-Oxide Tool Steel	00000000	0000

Plug Gauge Sets

With Case

Keep dozens of plug gauges on hand to check a range of hole sizes. You’ll often hear them called pin gauges. Use them to measure hole size and depth with precise go/no-go tests, check hole location and distance, and set micrometers. Sets include a manufacturer's certificate of accuracy to certify diameters are within tolerance. Gauges are tool steel, so they’re strong, hard, and resist wear.

If a go gauge can enter the hole and a no-go gauge is unable to enter, the hole is within tolerance. Go gauges check the minimum hole diameter. No-go gauges check the maximum hole diameter.

Choose a class based on the level of precision you need—the smaller the tolerance, the greater the accuracy. Classes are based on ASME standard B89.1.5, which states diameter won’t vary more than the listed plug gauge tolerance. Class ZZ gauges are ideal for quick checks that don't require extreme precision.

Black-oxide tool steel gauges show wear patterns, so you know when to calibrate or replace them.

Go Gauges
Plug Gauge Size	Increment	No. of Pieces	Lg.	Surface Smoothness (RMS), microinch	Material	Plug Gauge Tolerance	Specifications Met		Each
With Case
Class ZZ
0.0060" to 0.0600"	0.001"	55	2"	10	Black-Oxide Tool Steel	0" to 0.0002"	ASME B89.1.5	00000000	0000000
0.0065" to 0.0605"	0.001"	55	2"	10	Black-Oxide Tool Steel	0" to 0.0002"	ASME B89.1.5	00000000	000000
0.0110" to 0.0600"	0.001"	50	2"	10	Black-Oxide Tool Steel	0" to 0.0002"	ASME B89.1.5	0000000	00000
0.0110" to 0.2500"	0.001"	240	2"	10	Black-Oxide Tool Steel	0" to 0.0002"	ASME B89.1.5	00000000	000000
0.0115" to 0.0605"	0.001"	50	2"	10	Black-Oxide Tool Steel	0" to 0.0002"	ASME B89.1.5	00000000	00000
0.0115" to 0.2505"	0.001"	240	2"	10	Black-Oxide Tool Steel	0" to 0.0002"	ASME B89.1.5	00000000	000000
0.0610" to 0.2500"	0.001"	190	2"	10	Black-Oxide Tool Steel	0" to 0.0002"	ASME B89.1.5	0000000	000000
0.0615" to 0.2505"	0.001"	190	2"	10	Black-Oxide Tool Steel	0" to 0.0002"	ASME B89.1.5	00000000	000000
0.2510" to 0.5000"	0.001"	250	2"	10	Black-Oxide Tool Steel	0" to 0.0002"	ASME B89.1.5	0000000	000000
0.2515" to 0.5005"	0.001"	250	2"	10	Black-Oxide Tool Steel	0" to 0.0002"	ASME B89.1.5	00000000	000000
0.5010" to 0.6250"	0.001"	125	2"	10	Black-Oxide Tool Steel	0" to 0.0002"	ASME B89.1.5	0000000	000000
0.5015" to 0.6255"	0.001"	125	2"	10	Black-Oxide Tool Steel	0" to 0.0002"	ASME B89.1.5	00000000	000000
0.6260" to 0.7500"	0.001"	125	2"	10	Black-Oxide Tool Steel	0" to 0.0002"	ASME B89.1.5	0000000	000000
0.6265" to 0.7505"	0.001"	125	2"	10	Black-Oxide Tool Steel	0" to 0.0002"	ASME B89.1.5	00000000	000000
0.7510" to 0.8320"	0.001"	82	2"	10	Black-Oxide Tool Steel	0" to 0.0002"	ASME B89.1.5	00000000	000000
0.7515" to 0.8325"	0.001"	82	2"	10	Black-Oxide Tool Steel	0" to 0.0002"	ASME B89.1.5	00000000	000000
0.8330" to 0.9160"	0.001"	84	2"	10	Black-Oxide Tool Steel	0" to 0.0002"	ASME B89.1.5	00000000	000000
0.8335" to 0.9165"	0.001"	84	2"	10	Black-Oxide Tool Steel	0" to 0.0002"	ASME B89.1.5	00000000	000000
0.9170" to 1.0000"	0.001"	84	2"	10	Black-Oxide Tool Steel	0" to 0.0002"	ASME B89.1.5	00000000	000000
0.9175" to 1.0005"	0.001"	84	2"	10	Black-Oxide Tool Steel	0" to 0.0002"	ASME B89.1.5	00000000	000000
0.2000mm to 1.2800mm	0.02mm	55	2"	10	Black-Oxide Tool Steel	0mm to 0.005mm	ASME B89.1.5	00000000	000000
0.2100mm to 1.2900mm	0.02mm	55	2"	10	Black-Oxide Tool Steel	0mm to 0.005mm	ASME B89.1.5	00000000	000000
1.3000mm to 4.9800mm	0.02mm	185	2"	10	Tool Steel	0mm to 0.005mm	ASME B89.1.5	0000000	000000
1.3000mm to 4.9800mm	0.02mm	185	2"	10	Black-Oxide Tool Steel	0mm to 0.005mm	ASME B89.1.5	00000000	000000
1.3100mm to 4.9900mm	0.02mm	185	2"	10	Black-Oxide Tool Steel	0mm to 0.005mm	ASME B89.1.5	00000000	000000
5.0000mm to 9.9800mm	0.02mm	250	2"	10	Tool Steel	0mm to 0.005mm	ASME B89.1.5	0000000	000000
5.0000mm to 9.9800mm	0.02mm	250	2"	10	Black-Oxide Tool Steel	0mm to 0.005mm	ASME B89.1.5	00000000	000000
5.0100mm to 9.9900mm	0.02mm	250	2"	10	Black-Oxide Tool Steel	0mm to 0.005mm	ASME B89.1.5	00000000	000000
10.0000mm to 13.9800mm	0.02mm	200	2"	10	Tool Steel	0mm to 0.005mm	ASME B89.1.5	0000000	000000
10.0000mm to 13.9800mm	0.02mm	200	2"	10	Black-Oxide Tool Steel	0mm to 0.005mm	ASME B89.1.5	00000000	000000
10.0100mm to 13.9900mm	0.02mm	200	2"	10	Black-Oxide Tool Steel	0mm to 0.005mm	ASME B89.1.5	00000000	000000
14.0000mm to 16.4800mm	0.02mm	125	2"	10	Black-Oxide Tool Steel	0mm to 0.005mm	ASME B89.1.5	00000000	000000
14.0100mm to 16.4900mm	0.02mm	125	2"	10	Black-Oxide Tool Steel	0mm to 0.005mm	ASME B89.1.5	00000000	000000
16.5000mm to 18.9800mm	0.02mm	125	2"	10	Black-Oxide Tool Steel	0mm to 0.005mm	ASME B89.1.5	00000000	000000
16.5100mm to 18.9900mm	0.02mm	125	2"	10	Black-Oxide Tool Steel	0mm to 0.005mm	ASME B89.1.5	00000000	000000
19.0000mm to 20.9800mm	0.02mm	100	2"	10	Black-Oxide Tool Steel	0mm to 0.0061mm	ASME B89.1.5	00000000	000000
19.0100mm to 20.9900mm	0.02mm	100	2"	10	Black-Oxide Tool Steel	0mm to 0.0061mm	ASME B89.1.5	00000000	000000
No-Go Gauges
With Case
Class ZZ
0.0060" to 0.0600"	0.001"	55	2"	10	Black-Oxide Tool Steel	-0.0002" to 0"	ASME B89.1.5	00000000	000000
0.0065" to 0.0605"	0.001"	55	2"	10	Black-Oxide Tool Steel	-0.0002" to 0"	ASME B89.1.5	00000000	000000
0.0110" to 0.0600"	0.001"	50	2"	10	Black-Oxide Tool Steel	-0.0002" to 0"	ASME B89.1.5	0000000	00000
0.0110" to 0.2500"	0.001"	240	2"	10	Black-Oxide Tool Steel	-0.0002" to 0"	ASME B89.1.5	00000000	000000
0.0115" to 0.0605"	0.001"	50	2"	10	Black-Oxide Tool Steel	-0.0002" to 0"	ASME B89.1.5	00000000	00000
0.0115" to 0.2505"	0.001"	240	2"	10	Black-Oxide Tool Steel	-0.0002" to 0"	ASME B89.1.5	00000000	000000
0.0610" to 0.2500"	0.001"	190	2"	10	Black-Oxide Tool Steel	-0.0002" to 0"	ASME B89.1.5	0000000	000000
0.0615" to 0.2505"	0.001"	190	2"	10	Black-Oxide Tool Steel	-0.0002" to 0"	ASME B89.1.5	00000000	000000
0.2510" to 0.5000"	0.001"	250	2"	10	Black-Oxide Tool Steel	-0.0002" to 0"	ASME B89.1.5	0000000	000000
0.2515" to 0.5005"	0.001"	250	2"	10	Black-Oxide Tool Steel	-0.0002" to 0"	ASME B89.1.5	00000000	000000
0.5010" to 0.6250"	0.001"	125	2"	10	Black-Oxide Tool Steel	-0.0002" to 0"	ASME B89.1.5	0000000	000000
0.5015" to 0.6255"	0.001"	125	2"	10	Black-Oxide Tool Steel	-0.0002" to 0"	ASME B89.1.5	00000000	000000
0.6260" to 0.7500"	0.001"	125	2"	10	Black-Oxide Tool Steel	-0.0002" to 0"	ASME B89.1.5	0000000	000000
0.6265" to 0.7505"	0.001"	125	2"	10	Black-Oxide Tool Steel	-0.0002" to 0"	ASME B89.1.5	00000000	000000
0.7510" to 0.8320"	0.001"	82	2"	10	Black-Oxide Tool Steel	-0.0002" to 0"	ASME B89.1.5	00000000	000000
0.7515" to 0.8325"	0.001"	82	2"	10	Black-Oxide Tool Steel	-0.0002" to 0"	ASME B89.1.5	00000000	000000
0.8330" to 0.9160"	0.001"	84	2"	10	Black-Oxide Tool Steel	-0.0002" to 0"	ASME B89.1.5	00000000	000000
0.8335" to 0.9165"	0.001"	84	2"	10	Black-Oxide Tool Steel	-0.0002" to 0"	ASME B89.1.5	00000000	000000
0.9170" to 1.0000"	0.001"	84	2"	10	Black-Oxide Tool Steel	-0.0002" to 0"	ASME B89.1.5	00000000	000000
0.9175" to 1.0005"	0.001"	84	2"	10	Black-Oxide Tool Steel	-0.0002" to 0"	ASME B89.1.5	00000000	000000
0.2000mm to 1.2800mm	0.02mm	55	2"	10	Black-Oxide Tool Steel	-0.005mm to 0mm	ASME B89.1.5	00000000	000000
0.2100mm to 1.2900mm	0.02mm	55	2"	10	Black-Oxide Tool Steel	-0.005mm to 0mm	ASME B89.1.5	00000000	000000
1.3000mm to 4.9800mm	0.02mm	185	2"	10	Tool Steel	-0.005mm to 0mm	ASME B89.1.5	0000000	000000
1.3000mm to 4.9800mm	0.02mm	185	2"	10	Black-Oxide Tool Steel	-0.005mm to 0mm	ASME B89.1.5	00000000	000000
1.3100mm to 4.9900mm	0.02mm	185	2"	10	Black-Oxide Tool Steel	-0.005mm to 0mm	ASME B89.1.5	00000000	000000
5.0000mm to 9.9800mm	0.02mm	250	2"	10	Tool Steel	-0.005mm to 0mm	ASME B89.1.5	0000000	000000
5.0000mm to 9.9800mm	0.02mm	250	2"	10	Black-Oxide Tool Steel	-0.005mm to 0mm	ASME B89.1.5	00000000	000000
5.0100mm to 9.9900mm	0.02mm	250	2"	10	Black-Oxide Tool Steel	-0.005mm to 0mm	ASME B89.1.5	00000000	000000
10.0000mm to 13.9800mm	0.02mm	200	2"	10	Tool Steel	-0.005mm to 0mm	ASME B89.1.5	0000000	000000
10.0000mm to 13.9800mm	0.02mm	200	2"	10	Black-Oxide Tool Steel	-0.005mm to 0mm	ASME B89.1.5	00000000	000000
10.0100mm to 13.9900mm	0.02mm	200	2"	10	Black-Oxide Tool Steel	-0.005mm to 0mm	ASME B89.1.5	00000000	000000
14.0000mm to 16.4800mm	0.02mm	125	2"	10	Black-Oxide Tool Steel	-0.005mm to 0mm	ASME B89.1.5	00000000	000000
14.0100mm to 16.4900mm	0.02mm	125	2"	10	Black-Oxide Tool Steel	-0.005mm to 0mm	ASME B89.1.5	00000000	000000
16.5000mm to 18.9800mm	0.02mm	125	2"	10	Black-Oxide Tool Steel	-0.005mm to 0mm	ASME B89.1.5	00000000	000000
16.5100mm to 18.9900mm	0.02mm	125	2"	10	Black-Oxide Tool Steel	-0.005mm to 0mm	ASME B89.1.5	00000000	000000
19.0000mm to 20.9800mm	0.02mm	100	2"	10	Black-Oxide Tool Steel	-0.0061mm to 0mm	ASME B89.1.5	00000000	000000
19.0100mm to 20.9900mm	0.02mm	100	2"	10	Black-Oxide Tool Steel	-0.0061mm to 0mm	ASME B89.1.5	00000000	000000