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| PartNumber | D38999/20MJ35SA-LC | D38999/20MJ35SA | D38999/20MJ35SB |
| Description | Circular MIL Spec Connector 128P RCPT SZ 25 SKT WL MNT | Circular MIL Spec Connector SQUARE FLANGE RECEPTACLE | Circular MIL Spec Connector 128P WL mnt soc sz 25 |
| Manufacturer | Amphenol | TE Connectivity | - |
| Product Category | Circular MIL Spec Connector | Circular MIL Spec Connector | - |
| RoHS | Y | Y | - |
| Number of Positions | 128 Position | 128 Position | - |
| Insert Arrangement | 25-35 | 25 - 35 | - |
| Contact Gender | Without Socket Contacts | Socket (Female) | - |
| MIL Type | 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 | - |
| Current Rating | 5 A | 5 A | - |
| Contact Plating | - | - | - |
| Contact Material | - | - | - |
| Series | D38999 III | - | - |
| Mounting Angle | Straight | - | - |
| Brand | Amphenol Aerospace | TE Connectivity / DEUTSCH | - |
| Shell Plating | Electroless Nickel | Nickel | - |
| Mating Style | Self Locking | - | - |
| Product Type | Circular MIL Spec Connector | Circular MIL Spec Connector | - |
| Qualification | EREL | - | - |
| Shell Material | Aluminum | Composite | - |
| Factory Pack Quantity | 1 | 1 | - |
| Subcategory | Circular Connectors | Circular Connectors | - |
| Tradename | 38999 | - | - |
| Part # Aliases | 91-578899-35H | - | - |
| Unit Weight | 0.035274 oz | 0.035274 oz | - |