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| PartNumber | MS27508E22F55A | MS27508E22F55AA | MS27508E22F55P |
| Description | Circular MIL Spec Connector RECPT 5P SZ 22 | Circular MIL Spec Connector RECEPT | Circular MIL Spec Connector 55P FM SZ 22 PIN |
| Manufacturer | Amphenol | Amphenol | - |
| Product Category | Circular MIL Spec Connector | Circular MIL Spec Connector | - |
| RoHS | N | - | - |
| Number of Positions | 55 Position | 55 Position | - |
| Insert Arrangement | 22-55 | 22-55 | - |
| Contact Gender | Without Pin Contacts | Without Pin Contacts | - |
| MIL Type | MIL-DTL-38999 II | MIL-DTL-38999 II | - |
| Product | Receptacles | Receptacles | - |
| Shell Size | 22 | 22 | - |
| Shell Style | Box Mount | Box Mount | - |
| Mounting Style | Panel | - | - |
| Termination Style | Crimp | - | - |
| Current Rating | 7.5 A | - | - |
| Contact Plating | Gold | - | - |
| Series | MS 38999 II | MS 38999 II | - |
| Voltage Rating | 850 V | - | - |
| Brand | Amphenol Aerospace | Amphenol Aerospace | - |
| Shell Plating | Passivated Steel | Passivated Steel | - |
| Mating Style | Bayonet | - | - |
| Product Type | Circular MIL Spec Connector | Circular MIL Spec Connector | - |
| Qualification | EREL | - | - |
| Shell Material | Aluminum | - | - |
| Factory Pack Quantity | 1 | - | - |
| Subcategory | Circular Connectors | Circular Connectors | - |
| Tradename | 38999 | 38999 | - |
| Part # Aliases | 91-553078-55P | 91-553078-55E | - |