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| PartNumber | MS27508E18F66S | MS27508E18F66P | MS27508E18F66P-LC |
| Description | Circular MIL Spec Connector 66P SZ 18 SOCKET | Circular MIL Spec Connector RECEPT | Circular MIL Spec Connector 66P Sz 18 Back Panel Box Mt Recpt Crimp |
| Manufacturer | Amphenol | Amphenol | - |
| Product Category | Circular MIL Spec Connector | Circular MIL Spec Connector | - |
| RoHS | N | - | - |
| Number of Positions | 66 Position | 66 Position | - |
| Insert Arrangement | 18-66 | 18-66 | - |
| Contact Gender | Socket (Female) | Pin (Male) | - |
| MIL Type | MIL-DTL-38999 II | MIL-DTL-38999 II | - |
| Product | Receptacles | Receptacles | - |
| Shell Size | 18 | 18 | - |
| Shell Style | Box Mount | Box Mount | - |
| Termination Style | Crimp | Crimp | - |
| Current Rating | 5 A | 5 A | - |
| Series | MS 38999 II | MS 38999 II | - |
| Brand | Amphenol Aerospace | Amphenol Aerospace | - |
| Shell Plating | Passivated Steel | Passivated Steel | - |
| Product Type | Circular MIL Spec Connector | Circular MIL Spec Connector | - |
| Qualification | EREL | EREL | - |
| Factory Pack Quantity | 1 | - | - |
| Subcategory | Circular Connectors | Circular Connectors | - |
| Tradename | 38999 | 38999 | - |
| Part # Aliases | 91-542006-66S | 91-542006-66P | - |