Patterned Datums
You can assign datums to hole patterns, concentric holes with gaps between them, width patterns, and concentric bosses. You can create datums as individual features or patterns using counterbores and countersinks.
| Four-hole pattern used as secondary datum |
| Two concentric hole pattern used as secondary datum |
| Five-hole radial pattern used as primary datum |
| Two boss features used to define datum A |
| Two width features used to define datum B |
| Two counterbore holes used to define datum C |
| Two countersink holes used to define datum B |