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| PartNumber | MS27508E22B55AA | MS27508E22B55AB | MS27508E22B55A |
| Description | Circular MIL Spec Connector RECEPT | Circular MIL Spec Connector JT 55C 55#20 PIN RECP | Circular MIL Spec Connector 55C 55#20 PIN |
| Manufacturer | Amphenol | Amphenol | Amphenol |
| Product Category | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| Series | D38999 III | D38999 III | MS 38999 II |
| Brand | Amphenol Aerospace | Amphenol Aerospace | Amphenol Aerospace |
| Product Type | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| Subcategory | Circular Connectors | Circular Connectors | Circular Connectors |
| Tradename | 38999 | 38999 | 38999 |
| Part # Aliases | 88-565778-55E | 88-565778-55R | 88-565778-55P |
| RoHS | - | N | N |
| Factory Pack Quantity | - | 1 | - |
| Number of Positions | - | - | 55 Position |
| Insert Arrangement | - | - | 22-55 |
| Contact Gender | - | - | Without Pin Contacts |
| MIL Type | - | - | MIL-DTL-38999 II |
| Product | - | - | Receptacles |
| Shell Size | - | - | 22 |
| Shell Style | - | - | Box Mount |
| Mounting Style | - | - | Panel |
| Termination Style | - | - | Crimp |
| Current Rating | - | - | 7.5 A |
| Contact Plating | - | - | Gold |
| Mounting Angle | - | - | Straight |
| Voltage Rating | - | - | 850 V |
| Shell Plating | - | - | Olive Drab Cadmium |
| Qualification | - | - | EREL |
| Shell Material | - | - | Aluminum Alloy |
| Wire Gauge | - | - | 20 |