
A Go / No-Go Gauge is a precision inspection tool used to check whether a part dimension falls within specified tolerance limits.
GO side → must fit (minimum material condition)
NO-GO side → must NOT fit (maximum material condition)
This simple pass/fail method allows inspectors to perform fast, repeatable, and operator-independent inspections without needing complex measuring instruments.
Different applications require different gauge designs:
| Type | Application |
|---|---|
| Pin Go / No-Go Gauge | Hole diameter inspection |
| Ball Go / No-Go Gauge | Angled or hard-to-align holes |
| Shaped Go / No-Go Gauge | Slots, irregular profiles |
| Thread Go / No-Go Gauge | Internal or external threads |
| Custom Functional Gauge | Special mating condition checks |
Choosing the correct type ensures inspection accuracy and long-term usability.


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