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| PartNumber | D38999/20MJ4HA | D38999/20MJ4HA-LC | D38999/20MJ4HB |
| Description | Circular MIL Spec Connector 56P RCPT SZ 25 PIN WL MNT | Circular MIL Spec Connector CTV 143C 48#20 8 #16 PIN RECP | Circular MIL Spec Connector |
| Manufacturer | Amphenol | Amphenol | TE Connectivity |
| Product Category | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| RoHS | Y | Y | - |
| Number of Positions | 56 Position | - | 56 Position |
| Insert Arrangement | 25-4 | - | 25-4 |
| Contact Gender | Without Pin Contacts | Without Pin Contacts | Without Socket Contacts |
| MIL Type | MIL-DTL-38999 III | MIL-DTL-38999 III | MIL-DTL-38999 III |
| Product | Receptacles | - | Receptacles |
| Shell Size | 25 | - | 25 |
| Shell Style | Wall Mount | - | Wall Mount |
| Mounting Style | Panel | - | Panel |
| Termination Style | Crimp | - | Crimp |
| Current Rating | 7.5 A | - | 7.5 A |
| Contact Plating | Gold | - | Gold |
| Contact Material | Copper Alloy | - | Copper Alloy |
| Series | D38999 III | D38999 III | - |
| Mounting Angle | Straight | - | Straight |
| Brand | Amphenol Aerospace | Amphenol Aerospace | TE Connectivity / DEUTSCH |
| Shell Plating | Electroless Nickel | - | Electroless Nickel |
| Mating Style | Self Locking | - | Self Locking |
| Product Type | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| Qualification | EREL | - | - |
| Shell Material | Aluminum | - | Aluminum |
| Factory Pack Quantity | 1 | 1 | 1 |
| Subcategory | Circular Connectors | Circular Connectors | Circular Connectors |
| Tradename | 38999 | 38999 | - |
| Part # Aliases | D38999/20MJ04HA | - | - |
| Unit Weight | - | - | 0.035274 oz |