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| PartNumber | D38999/20JJ35HA-LC | D38999/20JJ35HB | D38999/20JJ35HA |
| Description | Circular MIL Spec Connector 128P Size 20 Wall Mount Recept Pin | Circular MIL Spec Connector SQUARE FLANGE RECEPTACLE | Circular MIL Spec Connector SQUARE FLANGE RECEPTACLE |
| Manufacturer | Amphenol | TE Connectivity | TE Connectivity |
| Product Category | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| RoHS | N | N | N |
| Contact Gender | Without Pin Contacts | - | Pin (Male) |
| MIL Type | MIL-DTL-38999 III | - | MIL-DTL-38999 III |
| Termination Style | - | - | Crimp |
| Contact Plating | - | - | Gold |
| Contact Material | - | - | Copper Alloy |
| Series | D38999 III | - | - |
| Brand | Amphenol Aerospace | TE Connectivity / DEUTSCH | TE Connectivity / DEUTSCH |
| Product Type | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| Factory Pack Quantity | 1 | 1 | 1 |
| Subcategory | Circular Connectors | Circular Connectors | Circular Connectors |
| Tradename | 38999 | - | - |
| Unit Weight | 0.035274 oz | 0.035274 oz | 0.035274 oz |
| Number of Positions | - | - | 128 Position |
| Insert Arrangement | - | - | 25-35 |
| Product | - | - | Receptacles |
| Shell Size | - | - | 25 |
| Shell Style | - | - | Wall Mount |
| Mounting Style | - | - | Panel |
| Mounting Angle | - | - | Straight |
| Shell Plating | - | - | Olive Drab Cadmium |
| Mating Style | - | - | Self Locking |
| Shell Material | - | - | Aluminum |