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| PartNumber | D38999/26FG39PA | D38999/26FG39PB | D38999/26FG39PA-LC |
| Description | Circular MIL Spec Connector 39P ST PLUG PIN SZ 21 | Circular MIL Spec Connector DTS 39C 37#20 2#16 PIN PLUG | Circular MIL Spec Connector |
| Manufacturer | Amphenol | TE Connectivity | Glenair |
| Product Category | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| RoHS | Y | Y | - |
| Number of Positions | 39 Position | 39 Position | 39 Position |
| Insert Arrangement | 21 - 39 | 21 - 39 | 21-39 |
| Contact Gender | Pin (Male) | Pin (Male) | Without Pin Contacts |
| MIL Type | MIL-DTL-38999 III | MIL-DTL-38999 III | MIL-DTL-38999 III |
| Product | Plugs | Plugs | Plugs |
| Shell Size | 21 | 21 | 21 |
| Shell Style | Straight | Straight | In-Line |
| Mounting Style | Free Hanging | Free Hanging | Wire |
| Termination Style | Crimp | Crimp | - |
| Current Rating | 7.5 A, 13 A | 7.5 A, 13 A | 7.5 A |
| Contact Plating | Gold | - | - |
| Contact Material | Copper Alloy | - | - |
| Series | D38999 III | D38999 Series III | - |
| Mounting Angle | Straight | - | Straight |
| Brand | Amphenol Aerospace | TE Connectivity / DEUTSCH | Glenair |
| Shell Plating | Nickel | Nickel | Electroless Nickel |
| Mating Style | Self Locking | - | Self Locking |
| Product Type | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| Qualification | EREL | - | - |
| Shell Material | Aluminum | Aluminum | Aluminum |
| Factory Pack Quantity | 1 | 1 | 1 |
| Subcategory | Circular Connectors | Circular Connectors | Circular Connectors |
| Tradename | 38999 | D38999 | - |
| Part # Aliases | 91-552047-39G | - | - |
| Unit Weight | - | 0.035274 oz | - |