Extra 6 / 12 · Uncertainty
Clearance and tolerances
A bolt must fit through a hole. We want a little room between them. Equality of their diameters would be the wrong target for this example.
Selected result
What remains connected
What is checked, and where this example stops
The observed clearance is [0.10,0.30] mm. Distance from the broad allowed interval is exactly zero; the narrower specification leaves possible violation [0,0.05] mm.
These dimensions are illustrative, not a fastener standard. Treating a tolerance as an actual-value bound requires a conformance premise.