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| PartNumber | MS3456L28-21B | MS3456L28-21P | MS3456L28-21PW |
| Description | Circular MIL Spec Connector PLUG | Circular MIL Spec Connector 37P MS Series MIL-DTL-5015 | Circular MIL Spec Connector 37P MS Series MIL-DTL-5015 |
| Manufacturer | Amphenol | Amphenol Aerospace | - |
| Product Category | Circular MIL Spec Connector | Contacts - Multi Purpose | - |
| Number of Positions | 37 Position | 37 Position | - |
| Insert Arrangement | 28-21 | 28-21 | - |
| Contact Gender | Without Socket Contacts | Pin (Male) | - |
| MIL Type | MIL-DTL-5015 | MIL-DTL-5015 | - |
| Product | Plugs | Plugs | - |
| Shell Size | 28 | 28 | - |
| Shell Style | In-Line | In-Line | - |
| Series | Matrix | Matrix 5015 | - |
| Packaging | Bulk | - | - |
| Brand | Amphenol Aerospace | - | - |
| Shell Plating | Electroless Nickel | Electroless Nickel | - |
| Mating Style | Threaded | Threaded | - |
| Product Type | Circular MIL Spec Connector | - | - |
| Shell Material | Aluminum | Aluminum | - |
| Factory Pack Quantity | 1 | - | - |
| Subcategory | Circular Connectors | - | - |
| Part # Aliases | 3456L2821B | - | - |
| Part Aliases | - | 3456L2821P | - |
| Mounting Style | - | Cable | - |
| Current Rating | - | 13 A | - |
| Termination Style | - | Crimp | - |
| Voltage Rating | - | 2 kV | - |
| Tradename | - | 5015 | - |
| Qualification | - | EREL | - |
| Wire Gauge | - | 20-16 | - |
| Mounting Angle | - | Straight | - |