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| PartNumber | MS27508E18A53S | MS27508E18A53S-LC | MS27508E18A66P |
| Description | Circular MIL Spec Connector 53P SZ 18 SOCKET | Circular MIL Spec Connector JT 53C 53#22 SKT RECP | Circular MIL Spec Connector RECEPT |
| Manufacturer | Amphenol | Amphenol | Amphenol |
| Product Category | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| RoHS | N | - | - |
| Number of Positions | 53 Position | - | 66 Position |
| Insert Arrangement | 18-53 | - | 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 |
| Mounting Style | Panel | - | - |
| Termination Style | Crimp | - | - |
| Current Rating | 5 A | - | - |
| Contact Plating | Gold | - | - |
| Series | MS 38999 II | D38999 III | MS 38999 II |
| Mounting Angle | Straight | - | - |
| Voltage Rating | 500 V | - | - |
| Brand | Amphenol Aerospace | Amphenol Aerospace | Amphenol Aerospace |
| Shell Plating | Cadmium | - | Cadmium |
| Product Type | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| Qualification | EREL | - | - |
| Factory Pack Quantity | 1 | 1 | 1 |
| Subcategory | Circular Connectors | Circular Connectors | Circular Connectors |
| Tradename | 38999 | 38999 | 38999 |
| Wire Gauge | 22 | - | - |
| Part # Aliases | 87-463036-53S | - | 87-463036-66P |