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| PartNumber | D38999/24FG75SN | D38999/24FG75SE | D38999/24FG75SE-LC |
| Description | Circular MIL Spec Connector 4P SIZE 21 JAM NUT RECEPTACLE SKT | Circular MIL Spec Connector TV 4C 4#8(TWIN) SKT J/N RECP | Circular MIL Spec Connector TV 4C 4#8(TWIN) SKT J/N RECP |
| Manufacturer | Amphenol | Amphenol | Amphenol |
| Product Category | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| RoHS | Y | Y | Y |
| Number of Positions | 4 Position | - | - |
| Insert Arrangement | 21 - 75 | - | - |
| Contact Gender | Socket (Female) | - | Without Socket Contacts |
| MIL Type | MIL-DTL-38999 III | - | MIL-DTL-38999 III |
| Product | Receptacles | - | - |
| Shell Size | 21 | - | - |
| Shell Style | Jam Nut | - | - |
| Mounting Style | Panel | - | - |
| Termination Style | Crimp | - | - |
| Current Rating | 46 A | - | - |
| Contact Plating | Gold | - | - |
| Contact Material | Copper Alloy | - | - |
| Series | D38999 III | D38999 III | D38999 III |
| Mounting Angle | Straight | - | - |
| Brand | Amphenol Aerospace | Amphenol Aerospace | Amphenol Aerospace |
| Shell Plating | Nickel | - | - |
| Mating Style | Self Locking | - | - |
| Product Type | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| Shell Material | Aluminum | - | - |
| Factory Pack Quantity | 1 | 1 | 1 |
| Subcategory | Circular Connectors | Circular Connectors | Circular Connectors |
| Tradename | 38999 | 38999 | 38999 |
| Part # Aliases | 91-552067-ABS | - | - |
| Unit Weight | 0.035274 oz | - | - |