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 Plug Gauge 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 Plug Gauge 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 Plug Gauge 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 Plug Gauge 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 Plug Gauge 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 | 000000 |
| Choose a Plug Gauge 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 Plug Gauge 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 Plug Gauge 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 |