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| PartNumber | D38999/20WD18AC | D38999/20WD18AA | D38999/20WD18AB |
| Description | Circular MIL Spec Connector 18C 18#20 Pin REC | Circular MIL Spec Connector RECEPT | Circular MIL Spec Connector DTS 18C 18#20 PI |
| Manufacturer | Amphenol | Amphenol | TE Connectivity |
| Product Category | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| Number of Positions | 18 Position | 18 Position | 18 Position |
| Insert Arrangement | 15 - 18 | 15 - 18 | 15 - 18 |
| Contact Gender | Without Pin Contacts | Without Pin Contacts | Without Pin Contacts |
| MIL Type | MIL-DTL-38999 III | MIL-DTL-38999 III | MIL-DTL-38999 III |
| Product | Receptacles | Receptacles | Receptacles |
| Shell Size | 15 | 15 | 15 |
| Shell Style | Wall Mount | Wall Mount | Wall Mount |
| Mounting Style | Panel | Panel | Panel |
| Termination Style | Crimp | Crimp | Crimp |
| Current Rating | 7.5 A | 7.5 A | 7.5 A |
| Series | D38999 III | D38999 III | D38999 Series III |
| Brand | Amphenol Aerospace | Amphenol Aerospace | TE Connectivity / DEUTSCH |
| Shell Plating | Olive Drab Cadmium | Olive Drab Cadmium | Olive Drab Cadmium |
| Product Type | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| Shell Material | Aluminum | Aluminum | Aluminum |
| Factory Pack Quantity | 1 | 1 | 1 |
| Subcategory | Circular Connectors | Circular Connectors | Circular Connectors |
| Tradename | 38999 | 38999 | D38999 |
| Part # Aliases | 88-565834-18K | 88-565834-18G | - |
| RoHS | - | N | N |
| Packaging | - | Bulk | - |
| Unit Weight | - | - | 0.035274 oz |