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DFARS Specialty Metals
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Ring Gauges for Outside Diameters
Check the outside diameter of shafts, rods, and other cylindrical objects to determine whether they’re in tolerance.
If your part can pass through a go gauge but cannot pass through a no-go gauge, it is within tolerance.
Go gauges check the maximum outside diameter.
No-go gauges check the minimum outside diameter.
For technical drawings and 3-D models, click on a part number.
| Choose a Size | Increment | Surface Smoothness (RMS), microinch | Hardness | Material | Gauge Tolerance | Each | |
Go Gauges | |||||||
|---|---|---|---|---|---|---|---|
Class Z | |||||||
| 0.1501" to 0.2400" | 0.0001" | 8 | Rockwell C60 | Tool Steel | -0.0001" to 0" | 0000000 | 0000000 |
| 0.2401" to 0.3650" | 0.0001" | 8 | Rockwell C60 | Tool Steel | -0.0001" to 0" | 0000000 | 000000 |
| 0.3651" to 0.5100" | 0.0001" | 8 | Rockwell C60 | Tool Steel | -0.0001" to 0" | 0000000 | 000000 |
| 0.5101" to 0.8250" | 0.0001" | 8 | Rockwell C60 | Tool Steel | -0.0001" to 0" | 0000000 | 000000 |
| 0.8251" to 1.1350" | 0.0001" | 8 | Rockwell C60 | Tool Steel | -0.00012" to 0" | 0000000 | 000000 |
| 1.1351" to 1.5100" | 0.0001" | 8 | Rockwell C60 | Tool Steel | -0.00012" to 0" | 0000000 | 000000 |
| 1.5101" to 2.0100" | 0.0001" | 8 | Rockwell C60 | Tool Steel | -0.00016" to 0" | 0000000 | 000000 |
| 2.0101" to 2.5100" | 0.0001" | 8 | Rockwell C60 | Tool Steel | -0.00016" to 0" | 0000000 | 000000 |
No-Go Gauges | |||||||
Class Z | |||||||
| 0.1501" to 0.2400" | 0.0001" | 8 | Rockwell C60 | Tool Steel | 0" to 0.0001" | 0000000 | 000000 |
| 0.2401" to 0.3650" | 0.0001" | 8 | Rockwell C60 | Tool Steel | 0" to 0.0001" | 0000000 | 000000 |
| 0.3651" to 0.5100" | 0.0001" | 8 | Rockwell C60 | Tool Steel | 0" to 0.0001" | 0000000 | 000000 |
| 0.5101" to 0.8250" | 0.0001" | 8 | Rockwell C60 | Tool Steel | 0" to 0.0001" | 0000000 | 000000 |
| 0.8251" to 1.1350" | 0.0001" | 8 | Rockwell C60 | Tool Steel | 0" to 0.00012" | 0000000 | 000000 |
| 1.1351" to 1.5100" | 0.0001" | 8 | Rockwell C60 | Tool Steel | 0" to 0.00012" | 0000000 | 000000 |
| 1.5101" to 2.0100" | 0.0001" | 8 | Rockwell C60 | Tool Steel | 0" to 0.00016" | 0000000 | 000000 |
| 2.0101" to 2.5100" | 0.0001" | 8 | Rockwell C60 | Tool Steel | 0" to 0.00016" | 0000000 | 000000 |
Master Ring Gauges
Set inside micrometers, dial bore gauges, and other precision tools.
For technical drawings and 3-D models, click on a part number.
| Choose a Size | Increment | Gauge Tolerance | Surface Smoothness (RMS), microinch | Hardness | Material | Each | |
Class Z | |||||||
|---|---|---|---|---|---|---|---|
| 0.1501" to 0.2400" | 0.0001" | -0.00005" to 0.00005" | 8 | Rockwell C60 | Tool Steel | 0000000 | 0000000 |
| 0.2401" to 0.3650" | 0.0001" | -0.00005" to 0.00005" | 8 | Rockwell C60 | Tool Steel | 0000000 | 000000 |
| 0.3650" to 0.5100" | 0.0001" | -0.00005" to 0.00005" | 8 | Rockwell C60 | Tool Steel | 0000000 | 000000 |
| 0.5101" to 0.8250" | 0.0001" | -0.00005" to 0.00005" | 8 | Rockwell C60 | Tool Steel | 0000000 | 000000 |
| 0.8251" to 1.1350" | 0.0001" | -0.00006" to 0.00006" | 8 | Rockwell C60 | Tool Steel | 0000000 | 000000 |
| 1.1351" to 1.5100" | 0.0001" | -0.00006" to 0.00006" | 8 | Rockwell C60 | Tool Steel | 0000000 | 000000 |
| 1.5101" to 2.0100" | 0.0001" | -0.00008" to 0.00008" | 8 | Rockwell C60 | Tool Steel | 0000000 | 000000 |
| 2.0101" to 2.5100" | 0.0001" | -0.00008" to 0.00008" | 8 | Rockwell C60 | Tool Steel | 0000000 | 000000 |