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| PartNumber | D38999/20FJ37SD | D38999/20FJ37SB | D38999/20FJ37SE-LC |
| Description | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| Manufacturer | Glenair | Glenair | Glenair |
| Product Category | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| Number of Positions | 37 Position | 37 Position | 37 Position |
| Insert Arrangement | 25 - 37 | 25 - 37 | 25-37 |
| Contact Gender | Socket (Female) | Socket (Female) | Socket (Female) |
| MIL Type | MIL-DTL-38999 III | MIL-DTL-38999 III | MIL-DTL-38999 III |
| Product | Receptacles | Receptacles | Receptacles |
| Shell Size | 25 | 25 | 25 |
| Shell Style | Wall Mount | Wall Mount | Flange Mount |
| Mounting Style | Panel | Panel | Panel |
| Termination Style | Crimp | Crimp | - |
| Current Rating | 13 A | 13 A | - |
| Brand | Glenair | Glenair | Glenair |
| Shell Plating | Nickel | Nickel | Nickel |
| Product Type | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| Shell Material | Aluminum | Aluminum | Aluminum Alloy |
| Factory Pack Quantity | 1 | 1 | 1 |
| Subcategory | Circular Connectors | Circular Connectors | Circular Connectors |
| Contact Plating | - | - | - |
| Contact Material | - | - | - |
| Mating Style | - | - | Bayonet |