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| PartNumber | MS3452L28-21A | MS3452L28-21B | MS3452L28-21P |
| Description | Circular MIL Spec Connector RECEPT | Circular MIL Spec Connector RECEPT | Circular MIL Spec Connector 37P Size 28 Box Mount Receptacle |
| Manufacturer | Amphenol | Amphenol | - |
| Product Category | Circular MIL Spec Connector | Circular MIL Spec Connector | - |
| Number of Positions | 37 Position | 37 Position | - |
| Insert Arrangement | 28-21 | 28-21 | - |
| Contact Gender | Without Pin Contacts | Without Socket Contacts | - |
| MIL Type | MIL-DTL-5015 | MIL-DTL-5015 | - |
| Product | Receptacles | Receptacles | - |
| Shell Size | 28 | 28 | - |
| Shell Style | Box Mount | Box Mount | - |
| Series | Matrix | Matrix | - |
| Packaging | Bulk | Bulk | - |
| Brand | Amphenol Aerospace | Amphenol Aerospace | - |
| Shell Plating | Electroless Nickel | Electroless Nickel | - |
| Mating Style | Threaded | Threaded | - |
| Product Type | Circular MIL Spec Connector | Circular MIL Spec Connector | - |
| Shell Material | Aluminum | Aluminum | - |
| Factory Pack Quantity | 1 | 1 | - |
| Subcategory | Circular Connectors | Circular Connectors | - |
| Part # Aliases | 3452L2821A | 3452L2821B | - |