Last updated 10 August 2026
No. ASME Y14.5-2018 removed symmetry. Use position for a center plane between two features of size, or profile of a surface for a surface relationship.
Symmetry went for the same reason as concentricity: it was a median-point control that cost more to verify than it was worth, and position already covers what it was reached for.
If you are holding a drawing that cites the 2018 standard and carries a symmetry callout anyway, the callout is not defined by the standard the drawing claims to follow. That is a question for the customer, and the answer belongs on a deviation rather than in somebody's head.
| The frame | ⌯|0.005 |
|---|---|
| Control | Symmetry |
| Removed in | Y14.5-2018 |
| Use instead | Position, for a center plane between two features of size. Profile of a surface for a surface relationship. |
| Legal under ASME Y14.5-2018 | no |
Open this case in the calculator, and change the numbers.
Computed by ctrlPlanner. ASME Y14.5-2018.