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| PartNumber | D38999/20FC4PN-LC | D38999/20FC4PN-CGMSS1 | D38999/20FC4PN |
| Description | Circular MIL Spec Connector 4P Sz 13 Wall Mt Pin Pin Receptacle | Circular MIL Spec Connector TV 4C 4#16 PIN RECP | Circular MIL Spec Connector DTS 4C 4#16 PIN REC P |
| Manufacturer | Amphenol | Amphenol | TE Connectivity |
| Product Category | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| RoHS | N | Y | Y |
| Number of Positions | 4 Position | - | 4 Position |
| Insert Arrangement | 13-4 | - | 13 - 4 |
| Contact Gender | Without Pin Contacts | - | Pin (Male) |
| 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 |
| Contact Plating | - | - | Gold |
| Contact Material | - | - | Copper Alloy |
| Series | D38999 III | D38999 III | D38999 Series III |
| Mounting Angle | Straight | - | Straight |
| Brand | Amphenol Aerospace | Amphenol Aerospace | TE Connectivity / DEUTSCH |
| Shell Plating | Electroless Nickel | - | Nickel |
| Mating Style | Self Locking | - | Threaded |
| Product Type | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| Shell Material | Aluminum | - | Aluminum |
| Factory Pack Quantity | 1 | 1 | 1 |
| Subcategory | Circular Connectors | Circular Connectors | Circular Connectors |
| Tradename | 38999 | 38999 | D38999 |
| Part # Aliases | D38999/20FC04PN-LC | - | - |
| Unit Weight | 0.582791 oz | 2.569844 oz | 0.806145 oz |
| Current Rating | - | - | 13 A |
| Wire Gauge | - | - | 20 AWG - 16 AWG |