Geometrical tolerancing
| Characteristic | Specification | Symbol | Unicode character | Datum Needed | 3D Rendering for lines | 3D Rendering for surface |
|---|---|---|---|---|---|---|
| Perpendicularity | Orientation |
|
U+27C2 | Yes | ||
| Coaxiality for median lines | Location |
|
U+25CE | Yes | ||
| Concentricity for centre points | Location |
|
U+25CE | Yes | ||
| Roundness | Form |
|
U+25CB | No | ||
| Flatness | Form |
|
U+23E5 | No | ||
| Straightness | Form |
|
U+23E4 | No |