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| PartNumber | MS27508E20F39B | MS27508E20F39A | MS27508E20F39P |
| Description | Circular MIL Spec Connector RECEPT | Circular MIL Spec Connector 39P 20 SIZE BOX MOUNT RECEPTACLE PIN | Circular MIL Spec Connector 39P Sz 20 Box Mount Recpt Pin |
| Manufacturer | Amphenol | Amphenol | Amphenol |
| Product Category | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| Series | D38999 III | MS 38999 II | 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 | 91-553077-39S | 91-553077-39P | 91-542007-39P |
| RoHS | - | N | - |
| Number of Positions | - | 39 Position | 39 Position |
| Insert Arrangement | - | 20-39 | 20-39 |
| Contact Gender | - | Without Pin Contacts | Pin (Male) |
| MIL Type | - | MIL-DTL-38999 II | MIL-DTL-38999 II |
| Product | - | Receptacles | Receptacles |
| Shell Size | - | 20 | 20 |
| Shell Style | - | Box Mount | Box Mount |
| Mounting Style | - | Panel | - |
| Termination Style | - | Crimp | Crimp |
| Current Rating | - | 7.5 A, 13 A | 7.5 A |
| Contact Plating | - | Gold | - |
| Mounting Angle | - | Straight | - |
| Voltage Rating | - | 850 V | - |
| Shell Plating | - | Passivated Steel | Passivated Steel |
| Qualification | - | EREL | EREL |
| Shell Material | - | Aluminum Alloy | - |
| Wire Gauge | - | 20, 16 | - |
| Factory Pack Quantity | - | - | 1 |