The following table shows the geometric characteristic symbols used in creating geometric tolerances. Unless otherwise stated, these symbols adhere to both ANSI and ISO standards.
Symbol | Characteristic | Type | |
![]() | Position | Location | |
![]() | Concentricity
or coaxiality | Location | |
![]() | Symmetry | Location | |
![]() | Parallelism | Orientation | |
![]() | Perpendicularity | Orientation | |
![]() | Angularity | Orientation | |
![]() | Cylindricity | Form | |
![]() | Flatness | Form | |
![]() | Circularity
or roundness | Form | |
![]() | Straightness | Form | |
![]() | Surface profile | Profile | |
![]() | Line profile | Profile | |
![]() | Circular runout | Runout | |
![]() | Total runout | Runout |