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| PartNumber | D38999/21HE55DC | D38999/21HE55DE | D38999/21HE55DB |
| Description | Circular MIL Spec Connector D38999/21HE55DC | Circular MIL Spec Connector D38999/21HE55DE | Circular MIL Spec Connector D38999/21HE55DB |
| Manufacturer | TE Connectivity | TE Connectivity | TE Connectivity |
| Product Category | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| RoHS | Y | Y | Y |
| Brand | TE Connectivity / DEUTSCH | TE Connectivity / DEUTSCH | TE Connectivity / DEUTSCH |
| Product Type | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| Factory Pack Quantity | 25 | 25 | 25 |
| Subcategory | Circular Connectors | Circular Connectors | Circular Connectors |
| Part # Aliases | YDTS20H17-55DCV001 | YDTS20H17-55DEV001 | YDTS20H17-55DBV001 |