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| PartNumber | D38999/20FD18SA-LC | D38999/20FD18SB | D38999/20FD18SC-LC |
| Description | Circular MIL Spec Connector | Circular MIL Spec Connector DTS 18C 18#20 SK | Circular MIL Spec Connector |
| Manufacturer | Glenair | TE Connectivity | Glenair |
| Product Category | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| Number of Positions | 18 Position | 18 Position | - |
| Insert Arrangement | 15-18 | 15 - 18 | - |
| Contact Gender | Without Socket Contacts | Socket (Female) | - |
| MIL Type | MIL-DTL-38999 III | MIL-DTL-38999 III | - |
| Product | Receptacles | Receptacles | - |
| Shell Size | 15 | 15 | - |
| Shell Style | Wall Mount | Wall Mount | - |
| Mounting Style | Panel | Panel | - |
| Termination Style | - | Crimp | - |
| Contact Plating | - | - | - |
| Contact Material | - | - | - |
| Mounting Angle | Straight | - | - |
| Brand | Glenair | TE Connectivity / DEUTSCH | Glenair |
| Shell Plating | Electroless Nickel | Nickel | - |
| Mating Style | Self Locking | - | - |
| Product Type | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| Shell Material | Aluminum | Aluminum | - |
| Factory Pack Quantity | 1 | 1 | 1 |
| Subcategory | Circular Connectors | Circular Connectors | Circular Connectors |
| Unit Weight | 0.804846 oz | 0.035274 oz | 0.803470 oz |
| RoHS | - | Y | - |
| Current Rating | - | 7.5 A | - |
| Series | - | D38999 Series III | - |
| Tradename | - | D38999 | - |