| Collar and Couplings Part Number | Description |
| 2CFM-12-12-K | 12 x 12 Metric Double Split Black Oxide Steel with Keyway |
| 2CFM-14-14-K | 14 x 14 Metric Double Split Black Oxide Steel with Keyway |
| 2CFM-15-15-K | 15 x 15 Metric Double Split Black Oxide Steel with Keyway |
| 2CFM-16-16-K | 16 x 16 Metric Double Split Black Oxide Steel with Keyway |
| 2CFM-20-20-K | 20 x 20 Metric Double Split Black Oxide Steel with Keyway |
| 2CFM-25-25-K | 25 x 25 Metric Double Split Black Oxide Steel with Keyway |
| 2CFM-30-30-K | 30 x 30 Metric Double Split Black Oxide Steel with Keyway |
| 2CFM-35-35-K | 35 x 35 Metric Double Split Black Oxide Steel with Keyway |
| 2CFM-40-40-K | 40 x 40 Metric Double Split Black Oxide Steel with Keyway |
| 2CFM-50-50-K | 50 x 50 Metric Double Split Black Oxide Steel with Keyway |
