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| PartNumber | MS27656T21B39PA | MS27656T21B39P | MS27656T21B39P-LC |
| Description | Circular MIL Spec Connector 39P Sz 21 Pin Recept Back Panel Wall Mnt | Circular MIL Spec Connector 39P 21 SIZE WALL MOUNT RECEPTACLE PIN | Circular MIL Spec Connector 39P Sz 21 Wall Mount Recpt Pin |
| Manufacturer | Amphenol | Amphenol | - |
| Product Category | Circular MIL Spec Connector | Circular MIL Spec Connector | - |
| Number of Positions | 39 Position | 39 Position | - |
| Insert Arrangement | 21-39 | 21-39 | - |
| Contact Gender | Pin (Male) | Pin (Male) | - |
| MIL Type | MIL-DTL-38999 | MIL-DTL-38999 | - |
| Product | Receptacles | Receptacles | - |
| Shell Size | 21 | 21 | - |
| Shell Style | Wall Mount | Wall Mount | - |
| Mounting Style | Wall | Panel | - |
| Termination Style | Crimp | Crimp | - |
| Current Rating | 7.5 A, 13 A | 7.5 A, 13 A | - |
| Contact Plating | Gold | Gold | - |
| Series | MS 38999 I | MS 38999 I | - |
| Packaging | Bulk | - | - |
| Voltage Rating | 850 V | 850 V | - |
| Brand | Amphenol Aerospace | Amphenol Aerospace | - |
| Shell Plating | Olive Drab Cadmium | Olive Drab Cadmium | - |
| Mating Style | Bayonet | - | - |
| Product Type | Circular MIL Spec Connector | Circular MIL Spec Connector | - |
| Shell Material | Aluminum | Aluminum Alloy | - |
| Factory Pack Quantity | 1 | 1 | - |
| Subcategory | Circular Connectors | Circular Connectors | - |
| Tradename | 38999 | 38999 | - |
| Part # Aliases | 88-463552-39E | 88-463552-39P | - |
| RoHS | - | N | - |
| Mounting Angle | - | Straight | - |
| Qualification | - | EREL | - |
| Wire Gauge | - | 20, 16 | - |
| Unit Weight | - | 1.791988 oz | - |