The portion of a limit gauge designed to reject a part if it fits. In a go/no-go inspection, the no-go gauge verifies that a machined feature has not exceeded its maximum or minimum allowable tolerance. If the no-go pin enters the hole, the part is oversized and fails inspection.
Heard on the job
The pin gauge dropped right through the bore on the no-go side, so the whole batch is scrap.
Related terms
Tolerance
The allowed deviation from nominal that an item or instrument may show and still be accepted.
Verification
A check that an item is good enough for its stated requirements, usually ending in pass or fail with no full calibration data.
Simple acceptance
A decision rule that passes any item whose measured value lies inside the tolerance, leaving uncertainty out of the call.