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| PartNumber | D38999/20JH55PB | D38999/20JH55PA | D38999/20JH55PA-LC |
| Description | Circular MIL Spec Connector SQUARE FLANGE RECEPTACLE | Circular MIL Spec Connector SQUARE FLANGE RECEPTACLE | Circular MIL Spec Connector 55P Size 20 Wall Mount Recept Pin |
| Manufacturer | TE Connectivity | TE Connectivity | Amphenol |
| Product Category | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| RoHS | N | N | N |
| Number of Positions | 55 Position | 55 Position | - |
| Insert Arrangement | 23 - 55 | 23 - 55 | - |
| Contact Gender | Pin (Male) | Pin (Male) | Without Pin Contacts |
| MIL Type | MIL-DTL-38999 III | MIL-DTL-38999 III | MIL-DTL-38999 III |
| Product | Receptacles | Receptacles | - |
| Shell Size | 23 | 23 | - |
| Shell Style | Wall Mount | Wall Mount | - |
| Mounting Style | Panel | Panel | - |
| Termination Style | Crimp | Crimp | - |
| Current Rating | 7.5 A | 7.5 A | - |
| Brand | TE Connectivity / DEUTSCH | TE Connectivity / DEUTSCH | Amphenol Aerospace |
| Shell Plating | Olive Drab Cadmium | Olive Drab Cadmium | - |
| Product Type | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| Shell Material | Composite | Composite | - |
| Factory Pack Quantity | 1 | 1 | 1 |
| Subcategory | Circular Connectors | Circular Connectors | Circular Connectors |
| Contact Plating | - | - | - |
| Contact Material | - | - | - |
| Series | - | - | D38999 III |
| Tradename | - | - | 38999 |