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Material Material |
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Certification Certification |
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Surface Smoothness (RMS) Surface Smoothness (RMS) |
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Hardness Hardness |
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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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Class Z Go Plug Gauges

Use these Class Z go gauges to check the minimum hole diameter. Also known as pin gauges, they help you measure hole size and depth, 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 | Plug Gauge Tolerance | Length | Surface Smoothness (RMS), microinch | Hardness | Material | Each | |
0.0110" to 0.0605" | 0.0005" | 0" to 0.0001" | 2" | 8 | Rockwell C60 | Tool Steel | 000000000 | 00000 |
Choose a Size | Increment | Plug Gauge Tolerance | Length | Surface Smoothness (RMS), microinch | Hardness | Material | Each | |
0.0610" to 0.2405" | 0.0005" | 0" to 0.0001" | 2" | 8 | Rockwell C60 | Tool Steel | 00000000 | 00000 |
Choose a Size | Increment | Plug Gauge Tolerance | Length | Surface Smoothness (RMS), microinch | Hardness | Material | Each | |
0.2410" to 0.5005" | 0.0005" | 0" to 0.0001" | 2" | 8 | Rockwell C60 | Tool Steel | 00000000 | 00000 |
Choose a Size | Increment | Plug Gauge Tolerance | Length | Surface Smoothness (RMS), microinch | Hardness | Material | Each | |
0.5010" to 0.6255" | 0.0005" | 0" to 0.0001" | 2" | 8 | Rockwell C60 | Tool Steel | 000000000 | 00000 |
Choose a Size | Increment | Plug Gauge Tolerance | Length | Surface Smoothness (RMS), microinch | Hardness | Material | Each | |
0.6260" to 0.7505" | 0.0005" | 0" to 0.0001" | 2" | 8 | Rockwell C60 | Tool Steel | 000000000 | 00000 |
Choose a Size | Increment | Plug Gauge Tolerance | Length | Surface Smoothness (RMS), microinch | Hardness | Material | Each | |
0.7510" to 0.8325" | 0.0005" | 0" to 0.0001" | 2" | 8 | Rockwell C60 | Tool Steel | 000000000 | 000000 |
Choose a Size | Increment | Plug Gauge Tolerance | Length | Surface Smoothness (RMS), microinch | Hardness | Material | Each | |
0.8330" to 0.9165" | 0.0005" | 0" to 0.0001" | 2" | 8 | Rockwell C60 | Tool Steel | 000000000 | 000000 |
Choose a Size | Increment | Plug Gauge Tolerance | Length | Surface Smoothness (RMS), microinch | Hardness | Material | Each | |
0.9170" to 1.0005" | 0.0005" | 0" to 0.0001" | 2" | 8 | Rockwell C60 | Tool Steel | 000000000 | 000000 |
Class Z No-Go Plug Gauges

These Class Z no-go gauges help you check the maximum hole diameter. Commonly known as pin gauges, use them to measure hole size and depth, 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 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 | Plug Gauge Tolerance | Length | Surface Smoothness (RMS), microinch | Hardness | Material | Each | |
0.0110" to 0.0605" | 0.0005" | -0.0001" to 0" | 2" | 8 | Rockwell C60 | Tool Steel | 000000000 | 00000 |
Choose a Size | Increment | Plug Gauge Size Tolerance | Length | Surface Smoothness (RMS), microinch | Hardness | Material | Each | |
0.0610" to 0.2500" | 0.0005" | -0.0001" to 0" | 2" | 8 | Rockwell C60 | Tool Steel | 000000000 | 00000 |
Choose a Size | Increment | Plug Gauge Size Tolerance | Length | Surface Smoothness (RMS), microinch | Hardness | Material | Each | |
0.2505" to 0.5005" | 0.0005" | -0.0001" to 0" | 2" | 8 | Rockwell C60 | Tool Steel | 000000000 | 00000 |
Choose a Size | Increment | Plug Gauge Size Tolerance | Length | Surface Smoothness (RMS), microinch | Hardness | Material | Each | |
0.5010" to 0.6255" | 0.0005" | -0.0001" to 0" | 2" | 8 | Rockwell C60 | Tool Steel | 000000000 | 00000 |
Choose a Size | Increment | Plug Gauge Size Tolerance | Length | Surface Smoothness (RMS), microinch | Hardness | Material | Each | |
0.6260" to 0.7505" | 0.0005" | -0.0001" to 0" | 2" | 8 | Rockwell C60 | Tool Steel | 000000000 | 00000 |
Choose a Size | Increment | Plug Gauge Size Tolerance | Length | Surface Smoothness (RMS), microinch | Hardness | Material | Each | |
0.7510" to 0.8325" | 0.0005" | -0.0001" to 0" | 2" | 8 | Rockwell C60 | Tool Steel | 000000000 | 000000 |
Choose a Size | Increment | Plug Gauge Size Tolerance | Length | Surface Smoothness (RMS), microinch | Hardness | Material | Each | |
0.8330" to 0.9165" | 0.0005" | -0.0001" to 0" | 2" | 8 | Rockwell C60 | Tool Steel | 000000000 | 000000 |
Choose a Size | Increment | Plug Gauge Size Tolerance | Length | Surface Smoothness (RMS), microinch | Hardness | Material | Each | |
0.9170" to 1.0005" | 0.0005" | -0.0001" to 0" | 2" | 8 | Rockwell C60 | Tool Steel | 000000000 | 000000 |
Metric Class Z Plug Gauges

These metric Class Z plug gauges are used for precision go/no-go measuring of hole sizes and depths, checking hole location and distance, and setting micrometers. They’re also known as pin gauges. 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.
Choose a Size | Increment | Length | Surface Smoothness (RMS), microinch | Hardness | Material | Plug Gauge Tolerance | Each | |
Go Gauge | ||||||||
---|---|---|---|---|---|---|---|---|
0.2200mm to 1.5100mm | 0.01mm | 2" | 8 | Rockwell C60 | Tool Steel | 0mm to 0.0025mm | 000000 | 00000 |
1.5200mm to 12.7100mm | 0.01mm | 2" | 8 | Rockwell C60 | Tool Steel | 0mm to 0.0025mm | 000000 | 0000 |
12.7200mm to 15.3100mm | 0.01mm | 2" | 8 | Rockwell C60 | Tool Steel | 0mm to 0.0025mm | 000000 | 0000 |
15.3200mm to 17.8100mm | 0.01mm | 2" | 8 | Rockwell C60 | Tool Steel | 0mm to 0.0025mm | 000000 | 00000 |
17.8200mm to 20.3700mm | 0.01mm | 2" | 8 | Rockwell C60 | Tool Steel | 0mm to 0.0025mm | 000000 | 00000 |
20.3800mm to 22.0500mm | 0.01mm | 2" | 8 | Rockwell C60 | Tool Steel | 0mm to 0.0025mm | 000000 | 00000 |
22.0600mm to 23.7300mm | 0.01mm | 2" | 8 | Rockwell C60 | Tool Steel | 0mm to 0.0025mm | 000000 | 00000 |
23.7400mm to 25.4100mm | 0.01mm | 2" | 8 | Rockwell C60 | Tool Steel | 0mm to 0.0025mm | 000000 | 00000 |
No-Go Gauge | ||||||||
0.2200mm to 1.5100mm | 0.01mm | 2" | 8 | Rockwell C60 | Tool Steel | -0.0025mm to 0mm | 000000 | 0000 |
1.5200mm to 12.7100mm | 0.01mm | 2" | 8 | Rockwell C60 | Tool Steel | -0.0025mm to 0mm | 0000000 | 0000 |
12.7200mm to 15.3100mm | 0.01mm | 2" | 8 | Rockwell C60 | Tool Steel | -0.0025mm to 0mm | 0000000 | 0000 |
15.3200mm to 17.8100mm | 0.01mm | 2" | 8 | Rockwell C60 | Tool Steel | -0.0025mm to 0mm | 0000000 | 00000 |
17.8200mm to 20.3700mm | 0.01mm | 2" | 8 | Rockwell C60 | Tool Steel | -0.0025mm to 0mm | 0000000 | 00000 |
20.3800mm to 22.0500mm | 0.01mm | 2" | 8 | Rockwell C60 | Tool Steel | -0.0025mm to 0mm | 0000000 | 00000 |
22.0600mm to 23.7300mm | 0.01mm | 2" | 8 | Rockwell C60 | Tool Steel | -0.0025mm to 0mm | 0000000 | 00000 |
23.7400mm to 25.4100mm | 0.01mm | 2" | 8 | Rockwell C60 | Tool Steel | -0.0025mm to 0mm | 0000000 | 00000 |
Plug Gauges with Handle

Take go and no-go measurements with the same tool. These gauges have a go gauge on one end, a no-go gauge on the other end, and a handle with bushings. They 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.
Check the minimum hole diameter with the go gauge end, and check the maximum hole diameter with the no-go gauge end. If the go gauge enters the hole and the no-go gauge is unable to enter, the hole is within tolerance.
Choose a Size | Increment | Go Gauge Tolerance | No-Go Gauge Tolerance | Lg. | Surface Smoothness (RMS), microinch | Hardness | Material | Each | |
0.0110" to 0.0755" | 0.0005" | 0" to 0.0001" | -0.0001" to 0" | 5 1/4" | 8 | Rockwell C60 | Tool Steel | 00000000 | 000000 |
0.0760" to 0.1805" | 0.0005" | 0" to 0.0001" | -0.0001" to 0" | 5 15/32" | 8 | Rockwell C60 | Tool Steel | 00000000 | 00000 |
0.1810" to 0.2815" | 0.0005" | 0" to 0.0001" | -0.0001" to 0" | 6 1/8" | 8 | Rockwell C60 | Tool Steel | 00000000 | 00000 |
0.2820" to 0.4065" | 0.0005" | 0" to 0.0001" | -0.0001" to 0" | 6 19/32" | 8 | Rockwell C60 | Tool Steel | 00000000 | 00000 |
0.4070" to 0.5005" | 0.0005" | 0" to 0.0001" | -0.0001" to 0" | 7 3/16" | 8 | Rockwell C60 | Tool Steel | 00000000 | 00000 |
0.5010" to 0.5105" | 0.0005" | 0" to 0.0001" | -0.0001" to 0" | 7 3/16" | 8 | Rockwell C60 | Tool Steel | 00000000 | 00000 |
0.5110" to 0.6255" | 0.0005" | 0" to 0.0001" | -0.0001" to 0" | 7 17/32" | 8 | Rockwell C60 | Tool Steel | 00000000 | 00000 |
0.6260" to 0.6355" | 0.0005" | 0" to 0.0001" | -0.0001" to 0" | 7 17/32" | 8 | Rockwell C60 | Tool Steel | 00000000 | 00000 |
0.6360" to 0.7505" | 0.0005" | 0" to 0.0001" | -0.0001" to 0" | 7 21/32" | 8 | Rockwell C60 | Tool Steel | 00000000 | 00000 |
0.7510" to 0.7605" | 0.0005" | 0" to 0.0001" | -0.0001" to 0" | 7 21/32" | 8 | Rockwell C60 | Tool Steel | 00000000 | 00000 |
0.7610" to 0.8325" | 0.0005" | 0" to 0.0001" | -0.0001" to 0" | 8 1/4" | 8 | Rockwell C60 | Tool Steel | 00000000 | 00000 |
0.8330" to 0.9165" | 0.0005" | 0" to 0.0001" | -0.0001" to 0" | 8 1/4" | 8 | Rockwell C60 | Tool Steel | 00000000 | 00000 |
0.9170" to 1.0005" | 0.0005" | 0" to 0.0001" | -0.0001" to 0" | 8 1/4" | 8 | Rockwell C60 | Tool Steel | 00000000 | 00000 |
Choose a Size | Increment | Go Gauge Tolerance | No-Go Gauge Tolerance | Lg. | Surface Smoothness (RMS), microinch | Hardness | Material | Each | |
0.2200mm to 1.9000mm | 0.01mm | 0mm to 0.0025mm | -0.0025mm to 0mm | 5 1/4" | 8 | Rockwell C60 | Tool Steel | 00000000 | 000000 |
1.9100mm to 4.5600mm | 0.01mm | 0mm to 0.0025mm | -0.0025mm to 0mm | 5 15/32" | 8 | Rockwell C60 | Tool Steel | 00000000 | 00000 |
4.5700mm to 7.1400mm | 0.01mm | 0mm to 0.0025mm | -0.0025mm to 0mm | 6 1/8" | 8 | Rockwell C60 | Tool Steel | 00000000 | 00000 |
7.1500mm to 10.3200mm | 0.01mm | 0mm to 0.0025mm | -0.0025mm to 0mm | 6 19/32" | 8 | Rockwell C60 | Tool Steel | 00000000 | 00000 |
10.3300mm to 12.7000mm | 0.01mm | 0mm to 0.0025mm | -0.0025mm to 0mm | 7 3/16" | 8 | Rockwell C60 | Tool Steel | 00000000 | 00000 |
12.9700mm to 15.3000mm | 0.01mm | 0mm to 0.0025mm | -0.0025mm to 0mm | 7 17/32" | 8 | Rockwell C60 | Tool Steel | 00000000 | 00000 |
15.3100mm to 16.2000mm | 0.01mm | 0mm to 0.0025mm | -0.0025mm to 0mm | 7 17/32" | 8 | Rockwell C60 | Tool Steel | 00000000 | 00000 |
16.2100mm to 19.3000mm | 0.01mm | 0mm to 0.0025mm | -0.0025mm to 0mm | 7 21/32" | 8 | Rockwell C60 | Tool Steel | 00000000 | 00000 |
19.3100mm to 20.3600mm | 0.01mm | 0mm to 0.0025mm | -0.0025mm to 0mm | 7 21/32" | 8 | Rockwell C60 | Tool Steel | 00000000 | 00000 |
20.3700mm to 22.0400mm | 0.01mm | 0mm to 0.0025mm | -0.0025mm to 0mm | 8 1/4" | 8 | Rockwell C60 | Tool Steel | 00000000 | 00000 |
23.7300mm to 25.4100mm | 0.01mm | 0mm to 0.0025mm | -0.0025mm to 0mm | 8 1/4" | 8 | Rockwell C60 | Tool Steel | 00000000 | 00000 |
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 | Plug Gauge Tolerance | Each | |
Go Gauges | ||||||||
---|---|---|---|---|---|---|---|---|
With Case | ||||||||
Class Z | ||||||||
0.0110" to 0.0600" | 0.001" | 50 | 2" | 8 | Tool Steel | 0" to 0.0001" | 0000000 | 000000 |
0.0110" to 0.2500" | 0.001" | 240 | 2" | 8 | Tool Steel | 0" to 0.0001" | 0000000 | 000000 |
0.0115" to 0.0605" | 0.001" | 50 | 2" | 8 | Tool Steel | 0" to 0.0001" | 0000000 | 000000 |
0.0115" to 0.2505" | 0.001" | 240 | 2" | 8 | Tool Steel | 0" to 0.0001" | 0000000 | 000000 |
0.0610" to 0.2500" | 0.001" | 190 | 2" | 8 | Tool Steel | 0" to 0.0001" | 0000000 | 000000 |
0.0615" to 0.2505" | 0.001" | 190 | 2" | 8 | Tool Steel | 0" to 0.0001" | 0000000 | 000000 |
0.2510" to 0.5000" | 0.001" | 250 | 2" | 8 | Tool Steel | 0" to 0.0001" | 0000000 | 000000 |
0.2515" to 0.5005" | 0.001" | 250 | 2" | 8 | Tool Steel | 0" to 0.0001" | 0000000 | 000000 |
0.5010" to 0.6250" | 0.001" | 125 | 2" | 8 | Tool Steel | 0" to 0.0001" | 0000000 | 000000 |
0.6260" to 0.7500" | 0.001" | 125 | 2" | 8 | Tool Steel | 0" to 0.0001" | 0000000 | 000000 |
0.2200mm to 1.5000mm | 0.02mm | 65 | 2" | 8 | Tool Steel | 0mm to 0.0025mm | 0000000 | 000000 |
With Cabinet | ||||||||
Class Z | ||||||||
0.0110" to 0.6250" | 0.001" | 615 | 2" | 8 | Tool Steel | 0" to 0.0001" | 00000000 | 00000000 |
0.0610" to 0.7500" | 0.001" | 690 | 2" | 8 | Tool Steel | 0" to 0.0001" | 00000000 | 00000000 |
No-Go Gauges | ||||||||
With Case | ||||||||
Class Z | ||||||||
0.0110" to 0.0600" | 0.001" | 50 | 2" | 8 | Tool Steel | -0.0001" to 0" | 0000000 | 00000 |
0.0110" to 0.2500" | 0.001" | 240 | 2" | 8 | Tool Steel | -0.0001" to 0" | 0000000 | 000000 |
0.0115" to 0.0605" | 0.001" | 50 | 2" | 8 | Tool Steel | -0.0001" to 0" | 0000000 | 000000 |
0.0115" to 0.2505" | 0.001" | 240 | 2" | 8 | Tool Steel | -0.0001" to 0" | 0000000 | 000000 |
0.0610" to 0.2500" | 0.001" | 190 | 2" | 8 | Tool Steel | -0.0001" to 0" | 0000000 | 000000 |
0.0615" to 0.2505" | 0.001" | 190 | 2" | 8 | Tool Steel | -0.0001" to 0" | 0000000 | 000000 |
0.2510" to 0.5000" | 0.001" | 250 | 2" | 8 | Tool Steel | -0.0001" to 0" | 0000000 | 000000 |
0.2515" to 0.5005" | 0.001" | 250 | 2" | 8 | Tool Steel | -0.0001" to 0" | 0000000 | 000000 |
0.5010" to 0.6250" | 0.001" | 125 | 2" | 8 | Tool Steel | -0.0001" to 0" | 0000000 | 000000 |
0.6260" to 0.7500" | 0.001" | 125 | 2" | 8 | Tool Steel | -0.0001" to 0" | 0000000 | 000000 |
0.2200mm to 1.5000mm | 0.02mm | 65 | 2" | 8 | Tool Steel | -0.0025mm to 0mm | 0000000 | 000000 |
With Cabinet | ||||||||
Class Z | ||||||||
0.0110" to 0.6250" | 0.001" | 615 | 2" | 8 | Tool Steel | -0.0001" to 0" | 00000000 | 00000000 |
0.0610" to 0.7500" | 0.001" | 690 | 2" | 8 | Tool Steel | -0.0001" to 0" | 00000000 | 00000000 |