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| PartNumber | MS27473T18A66P | MS27473T18A66S | MS27473T18A66PA |
| Description | Circular MIL Spec Connector 66P Sz 18 Straight Plug Pin | Circular MIL Spec Connector 66P Sz 18 Straight Plug Socket | Conn Subminiature Cylindrical PIN 66 POS Crimp ST Cable Mount 66 Terminal 1 Port |
| Manufacturer | Amphenol | Amphenol | - |
| Product Category | Circular MIL Spec Connector | Circular MIL Spec Connector | - |
| Number of Positions | 66 Position | 66 Position | - |
| Insert Arrangement | 18-66 | 18-66 | - |
| Contact Gender | Pin (Male) | Socket (Female) | - |
| MIL Type | MIL-DTL-38999 II | MIL-DTL-38999 II | - |
| Product | Plugs | Plugs | - |
| Shell Size | 18 | 18 | - |
| Shell Style | In-Line | In-Line | - |
| Series | MS 38999 II | MS 38999 II | - |
| Brand | Amphenol Aerospace | Amphenol Aerospace | - |
| Shell Plating | Cadmium | Cadmium | - |
| Product Type | Circular MIL Spec Connector | Circular MIL Spec Connector | - |
| Factory Pack Quantity | 1 | 1 | - |
| Subcategory | Circular Connectors | Circular Connectors | - |
| Tradename | 38999 | 38999 | - |
| Part # Aliases | 87-443251-66P | 87-443251-66S | - |