Class ZZ Plug Gauges

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20 Products

Commonly known as pin gauges, these Class ZZ plug gauges are used for precision go/no-go measuring of hole sizes and depths, checking hole location and distance, and setting 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.

Go gauges check the minimum hole diameter.

No-go gauges check the maximum hole diameter.

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

								Each
Choose a Plug Gauge Size	Increment	Plug Gauge Size Tolerance	Length	Surface Smoothness (RMS)	Hardness	Material		1-2	3-5	6-Up
Go Gauge
0.0110" to 0.3760"	0.0001"	0" to 0.0002"	4"	10 microinch	Rockwell C60	Tool Steel	0000000	000000	000000	000000
No-Go Gauge
0.0110" to 0.3760"	0.0001"	-0.0002" to 0"	4"	10 microinch	Rockwell C60	Tool Steel	0000000	00000	00000	00000

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

Take precision go/no-go measurements of hole sizes and depths, check hole location and distance, and set micrometers. These sets have 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.

Go gauges check the minimum hole diameter.

No-go gauges check the maximum hole diameter.

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

Go Gauges
Size	Increment	No. of Pieces	Lg.	Surface Smoothness (RMS), microinch	Material	Plug Gauge Tolerance		Each
With Case
Class ZZ
1.3000mm to 4.9800mm	0.02mm	185	2"	10	Tool Steel	0mm to 0.005mm	0000000	0000000
5.0000mm to 9.9800mm	0.02mm	250	2"	10	Tool Steel	0mm to 0.005mm	0000000	000000
10.0000mm to 13.9800mm	0.02mm	200	2"	10	Tool Steel	0mm to 0.005mm	0000000	000000
No-Go Gauges
With Case
Class ZZ
1.3000mm to 4.9800mm	0.02mm	185	2"	10	Tool Steel	-0.005mm to 0mm	0000000	000000
5.0000mm to 9.9800mm	0.02mm	250	2"	10	Tool Steel	-0.005mm to 0mm	0000000	000000
10.0000mm to 13.9800mm	0.02mm	200	2"	10	Tool Steel	-0.005mm to 0mm	0000000	000000

Wear-Recognition Plug Gauge Sets

Get your choice of one target-size gauge with 12 larger gauges and 12 smaller gauges, graduated in 0.0001”. Also known as tenth-step gauges, they’re often used in metrology labs, quality control departments, and tool rooms for setting snap gauges and comparators. They measure hole sizes and depths, check hole locations and distance, and set micrometers. These sets have 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.

Go gauges check the minimum hole diameter.

No-go gauges check the maximum hole diameter.

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

Go Gauges
Increment	No. of Pieces	Lg.	Surface Smoothness (RMS), microinch	Hardness	Material	Plug Gauge Tolerance	Plug Gauge Size			Each
Class ZZ
0.001"	50	2"	10	Rockwell C60	Black Oxide Tool Steel	0" to 0.0002"	0.0110"	0.0600"	0000000	000000
0.001"	190	2"	10	Rockwell C60	Black Oxide Tool Steel	0" to 0.0002"	0.0610"	0.2500"	0000000	000000
No-Go Gauges
Class ZZ
0.001"	50	2"	10	Rockwell C60	Black Oxide Tool Steel	-0.0002" to 0"	0.0110"	0.0600"	0000000	00000
0.001"	190	2"	10	Rockwell C60	Black Oxide Tool Steel	-0.0002" to 0"	0.0610"	0.2500"	0000000	000000