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| PartNumber | D38999/20JC4BC | D38999/20JC4BD | D38999/20JC4BN |
| Description | Circular MIL Spec Connector 4C 4#16 SKT REC | Circular MIL Spec Connector CTV 4C 4#16 SKT RECP | |
| Manufacturer | Amphenol | Amphenol | TE Connectivity / DEUTSCH |
| Product Category | Circular MIL Spec Connector | Circular MIL Spec Connector | Contacts - Multi Purpose |
| Number of Positions | 4 Position | - | 4 Position |
| Insert Arrangement | 13 - 4 | - | 13-4 |
| Contact Gender | Without Socket Contacts | - | Without Socket Contacts |
| MIL Type | MIL-DTL-38999 III | - | MIL-DTL-38999 III |
| Product | Receptacles | - | Receptacles |
| Shell Size | 13 | - | 13 |
| Shell Style | Wall Mount | - | Wall Mount |
| Mounting Style | Panel | - | Panel |
| Termination Style | Crimp | - | Crimp |
| Current Rating | 13 A | - | - |
| Series | D38999 III | D38999 III | - |
| Brand | Amphenol Aerospace | Amphenol Aerospace | - |
| Shell Plating | Olive Drab Cadmium | - | Olive Drab Cadmium |
| Product Type | Circular MIL Spec Connector | Circular MIL Spec Connector | - |
| Shell Material | Composite | - | Aluminum |
| Factory Pack Quantity | 1 | 1 | - |
| Subcategory | Circular Connectors | Circular Connectors | - |
| Tradename | 38999 | 38999 | - |
| Part # Aliases | D38999/20JC04BC | 88-579773-04N | - |
| RoHS | - | N | - |
| Contact Material | - | - | Copper Alloy |
| Contact Plating | - | - | Gold |
| Mounting Angle | - | - | Straight |
| Mating Style | - | - | Self Locking |