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| PartNumber | D38999/20WH55SA-LC | D38999/20WH55SA | D38999/20WH55SB |
| Description | Circular MIL Spec Connector DTS 55C 55#20 SKT R ECP | Circular MIL Spec Connector DTS 55C 55#20 SKT R ECP | Circular MIL Spec Connector 55P Sz 23 Wall Mount Socket Receptacle |
| 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 | 55 Position |
| Insert Arrangement | 23-55 | 23 - 55 | 23 - 55 |
| Contact Gender | Without Socket Contacts | Socket (Female) | Socket (Female) |
| MIL Type | MIL-DTL-38999 III | MIL-DTL-38999 III | MIL-DTL-38999 III |
| Product | Receptacles | Receptacles | Receptacles |
| Shell Size | 23 | 23 | 23 |
| Shell Style | Wall Mount | Wall Mount | Wall Mount |
| Mounting Style | Panel | Panel | Panel |
| Termination Style | - | Crimp | Crimp |
| Current Rating | 7.5 A | 7.5 A | 7.5 A |
| Contact Plating | - | - | Gold |
| Contact Material | - | - | Copper Alloy |
| Series | D38999 Series III | D38999 Series III | D38999 III |
| Mounting Angle | Straight | - | Straight |
| Brand | TE Connectivity / DEUTSCH | TE Connectivity / DEUTSCH | Amphenol Aerospace |
| Shell Plating | Olive Drab Cadmium | Olive Drab Cadmium | Olive Drab Cadmium |
| Mating Style | Self Locking | - | Self Locking |
| Product Type | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| Shell Material | Aluminum | Aluminum | Aluminum |
| Factory Pack Quantity | 1 | 1 | 1 |
| Subcategory | Circular Connectors | Circular Connectors | Circular Connectors |
| Tradename | D38999 | D38999 | 38999 |
| Unit Weight | 0.035274 oz | 3.039981 oz | - |
| Part # Aliases | - | - | 88-552008-55J |