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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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Class ZZ Plug Gauges

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 Size | Increment | Length | Surface Smoothness (RMS) | Hardness | Material | Gauge Tolerance | 1-2 | 3-5 | 6-Up | |
Go Gauge | ||||||||||
0.0110" to 0.3759" | 0.0001" | 4" | 10 microinch | Rockwell C60 | Tool Steel | 0" to 0.0002" | 0000000 | 000000 | 000000 | 000000 |
No-Go Gauge | ||||||||||
0.0110" to 0.3759" | 0.0001" | 4" | 10 microinch | Rockwell C60 | Tool Steel | -0.0002" to 0" | 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.
Choose a Size | Increment | Gauge Tolerance | Length | Surface Smoothness (RMS), microinch | Hardness | Material | Each | |
Class ZZ | ||||||||
---|---|---|---|---|---|---|---|---|
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.
Choose a Size | Increment | Gauge Tolerance | Length | Surface Smoothness (RMS), microinch | Hardness | Material | Each | |
Class ZZ | ||||||||
---|---|---|---|---|---|---|---|---|
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

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.
Size | Increment | No. of Pieces | Lg. | Surface Smoothness (RMS), microinch | Material | Gauge Tolerance | Each | |
Go Gauges | ||||||||
---|---|---|---|---|---|---|---|---|
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

To indicate when you need to calibrate or replace the gauges in these sets, gauges have a black-oxide treatment that shows wear patterns. These sets are used to take precision go/no-go measurements of hole sizes and depths, check hole location and distance, and set micrometers. All 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.
Size | Increment | No. of Pieces | Lg. | Surface Smoothness (RMS), microinch | Hardness | Material | Gauge Tolerance | Each | |
Go Gauges | |||||||||
---|---|---|---|---|---|---|---|---|---|
Class ZZ | |||||||||
0.0110" to 0.0600" | 0.001" | 50 | 2" | 10 | Rockwell C60 | Black-Oxide Tool Steel | 0" to 0.0002" | 0000000 | 000000 |
0.0610" to 0.2500" | 0.001" | 190 | 2" | 10 | Rockwell C60 | Black-Oxide Tool Steel | 0" to 0.0002" | 0000000 | 000000 |
No-Go Gauges | |||||||||
Class ZZ | |||||||||
0.0110" to 0.0600" | 0.001" | 50 | 2" | 10 | Rockwell C60 | Black-Oxide Tool Steel | -0.0002" to 0" | 0000000 | 00000 |
0.0610" to 0.2500" | 0.001" | 190 | 2" | 10 | Rockwell C60 | Black-Oxide Tool Steel | -0.0002" to 0" | 0000000 | 000000 |