D2 Ring
The inner diameter and inner hole patter of D2 rings are the same as the corresponding full-ring. The outer hole pattern places as many holes as possible to allow fasteners and structural elements to be positioned where they might otherwise not fit. Three sizes available.
| Part No. | Internal Diameter | Thickness | System Size |
| 2.15005 | 50mm | 3.2mm | Standard |
| 2.16605 | 66mm | 3.2mm | Standard |
| 2.18405 | 84mm | 4.7mm | Standard |
