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| PartNumber | D38999/26WH21SN-QA | D38999/26WH21SN | D38999/26WH21SN-LC |
| Description | Circular MIL Spec Connector TV 21C 21#16 SKT PLUG | Circular MIL Spec Connector 21P Sz 23 Straight Plug Socket Cont | Circular MIL Spec Connector DTS 21C 21#16 SK |
| Manufacturer | Amphenol | Souriau | TE Connectivity |
| Product Category | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| Series | D38999 III | D38999 | D38999 Series III |
| Brand | Amphenol Aerospace | Souriau | TE Connectivity / DEUTSCH |
| Product Type | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| Subcategory | Circular Connectors | Circular Connectors | Circular Connectors |
| Tradename | 38999 | - | D38999 |
| RoHS | - | N | N |
| Number of Positions | - | 21 Position | 21 Position |
| Insert Arrangement | - | 23 - 21 | 23-21 |
| Contact Gender | - | Socket (Female) | Without Socket Contacts |
| MIL Type | - | MIL-DTL-38999 III | MIL-DTL-38999 III |
| Product | - | Plugs | Plugs |
| Shell Size | - | 23 | 23 |
| Shell Style | - | Straight | In-Line |
| Mounting Style | - | Free Hanging | Wire |
| Termination Style | - | Crimp | - |
| Current Rating | - | 13 A | 13 A |
| Contact Plating | - | Gold | - |
| Contact Material | - | Copper Alloy | - |
| Voltage Rating | - | 2.3 kV | - |
| Shell Plating | - | Olive Drab Cadmium | Olive Drab Chromate over Cadmium |
| Mating Style | - | Bayonet | Self Locking |
| Shell Material | - | Aluminum | Aluminum |
| Factory Pack Quantity | - | 5 | 1 |
| Mounting Angle | - | - | Straight |
| Unit Weight | - | - | 0.035274 oz |