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| PartNumber | D38999/20TH55SN | D38999/20TH55SA-LC | D38999/20TH55SA |
| Description | Circular MIL Spec Connector 55P Sz 23 Wall Mount Recpt Durmalon Skt | Circular MIL Spec Connector TV 55C 55#20 SKT RECP | Circular MIL Spec Connector TV 55C 55#20 SKT RECP |
| Manufacturer | Amphenol | Amphenol | Amphenol |
| Product Category | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| RoHS | Y | Y | - |
| Number of Positions | 55 Position | - | 55 Position |
| Insert Arrangement | 23 - 55 | - | 23 - 55 |
| Contact Gender | Socket (Female) | Without Socket Contacts | Socket (Female) |
| MIL Type | MIL-DTL-38999 III | MIL-DTL-38999 III | MIL-DTL-38999 III |
| Product | Receptacles | - | Receptacles |
| Shell Size | 23 | - | 23 |
| Shell Style | Wall Mount | - | Wall Mount |
| Mounting Style | Panel | - | Panel |
| Termination Style | Crimp | - | Crimp |
| Current Rating | 7.5 A | - | 7.5 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-PTFE | - | Nickel-PTFE |
| Mating Style | Self Locking | - | - |
| 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 | 38999 |
| Part # Aliases | F7-552008-55S | - | - |