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 |