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| PartNumber | D38999/20WG39BC | D38999/20WG39BB | D38999/20WG39BA |
| Description | Circular MIL Spec Connector 39C 37#20, 2#16 | Circular MIL Spec Connector 39P Skt Sz 21 Square Flange Rcpt | Circular MIL Spec Connector |
| Manufacturer | TE Connectivity | Souriau | Glenair |
| Product Category | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| RoHS | N | - | - |
| Series | D38999 Series III | D38999 | - |
| Brand | TE Connectivity / DEUTSCH | Souriau | Glenair |
| Product Type | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| Factory Pack Quantity | 1 | - | 1 |
| Subcategory | Circular Connectors | Circular Connectors | Circular Connectors |
| Tradename | D38999 | - | - |
| Unit Weight | 0.035274 oz | - | - |
| Number of Positions | - | 39 Position | 39 Position |
| Insert Arrangement | - | 21 - 39 | 21 - 39 |
| Contact Gender | - | Socket (Female) | Without Socket Contacts |
| MIL Type | - | MIL-DTL-38999 III | MIL-DTL-38999 III |
| Product | - | Receptacles | Receptacles |
| Shell Size | - | 21 | 21 |
| Shell Style | - | Wall Mount | Wall Mount |
| Mounting Style | - | Panel | Panel |
| Termination Style | - | Crimp | Crimp |
| Current Rating | - | 7.5 A, 13 A | 7.5 A, 13 A |
| Contact Plating | - | Gold | - |
| Contact Material | - | Copper Alloy | - |
| Mounting Angle | - | Straight | - |
| Voltage Rating | - | 1.8 kV | - |
| Shell Plating | - | Olive Drab Cadmium | Olive Drab Cadmium |
| Mating Style | - | Threaded | - |
| Shell Material | - | Aluminum | Aluminum |