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| PartNumber | D38999/20WG75PA-LC | D38999/20WG75PA | D38999/20WG75PB |
| Description | Circular MIL Spec Connector 4P Sz 21 Wall Mount Pin Receptacle | Circular MIL Spec Connector 4P RCPT SZ 21 PIN WL MNT | Circular MIL Spec Connector 4P Sz 21 Wall Mount Pin Receptacle |
| Manufacturer | Amphenol | Souriau Connection Technology | |
| Product Category | Circular MIL Spec Connector | IC Chips | IC Chips |
| RoHS | N | - | - |
| Number of Positions | 4 Position | 4 | - |
| Insert Arrangement | 21-75 | - | - |
| Contact Gender | Without Pin Contacts | - | - |
| MIL Type | MIL-DTL-38999 III | - | - |
| Product | Receptacles | - | - |
| Shell Size | 21 | - | - |
| Shell Style | Wall Mount | - | - |
| Mounting Style | Panel | - | - |
| Termination Style | - | - | - |
| Current Rating | 46 A | - | - |
| Contact Plating | - | - | - |
| Contact Material | - | - | - |
| Series | D38999 III | Military, MIL-DTL-38999 Series III | - |
| Mounting Angle | Straight | - | - |
| Brand | Amphenol Aerospace | - | - |
| Shell Plating | Olive Drab Cadmium | - | - |
| Mating Style | Self Locking | - | - |
| Product Type | Circular MIL Spec Connector | - | - |
| Qualification | EREL | - | - |
| Shell Material | Aluminum | - | - |
| Factory Pack Quantity | 1 | - | - |
| Subcategory | Circular Connectors | - | - |
| Tradename | 38999 | - | - |
| Packaging | - | Bulk | - |
| Termination | - | Crimp | - |
| Mounting Type | - | Panel Mount, Flange | - |
| Features | - | - | - |
| Ingress Protection | - | - | - |
| Connector Type | - | Receptacle, Male Pins | - |
| Orientation | - | A | - |
| Contact Finish | - | Gold | - |
| Shell Size Insert | - | 21-75 | - |
| Fastening Type | - | Threaded | - |
| Shell Size MIL | - | G | - |
| Shell Material Finish | - | Aluminum, Olive Drab Cadmium Plated | - |