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| PartNumber | D38999/24TG75SB-LC | D38999/24TG75SA | D38999/24TG75SN |
| Description | Circular MIL Spec Connector TV 4C 4#8(TWIN) SKT J/N RECP | Circular MIL Spec Connector 4P Sz 21 Jam Nut Recpt Durmalon Skt | Circular MIL Spec Connector 4P Sz 21 Jam Nut Recpt Durmalon Skt |
| Manufacturer | Amphenol | Amphenol | Amphenol |
| Product Category | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| RoHS | Y | Y | Y |
| Contact Gender | Without Socket Contacts | Socket (Female) | Socket (Female) |
| MIL Type | MIL-DTL-38999 III | MIL-DTL-38999 III | MIL-DTL-38999 III |
| Termination Style | - | Crimp | Crimp |
| Contact Plating | - | Gold | Gold |
| Contact Material | - | Copper Alloy | Copper Alloy |
| Series | D38999 III | D38999 III | D38999 III |
| Brand | Amphenol Aerospace | Amphenol Aerospace | Amphenol Aerospace |
| Product Type | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| Factory Pack Quantity | 1 | 1 | 1 |
| Subcategory | Circular Connectors | Circular Connectors | Circular Connectors |
| Tradename | 38999 | 38999 | 38999 |
| Number of Positions | - | 4 Position | 4 Position |
| Insert Arrangement | - | 21 - 75 | 21 - 75 |
| Product | - | Receptacles | Receptacles |
| Shell Size | - | 21 | 21 |
| Shell Style | - | Jam Nut | Jam Nut |
| Mounting Style | - | Panel | Panel |
| Current Rating | - | 46 A | 46 A |
| Mounting Angle | - | Straight | Straight |
| Shell Plating | - | Nickel-PTFE | Nickel-PTFE |
| Mating Style | - | Self Locking | Self Locking |
| Shell Material | - | Aluminum | Aluminum |
| Part # Aliases | - | F7-552067-ABH | F7-552067-ABS |