| PartNumber | MS3100E28-51S | MS3100E28-3S | MS3100E28-51P |
| Description | Circular MIL Spec Connector ER 12C 12#12 SKT RECP WALL | Circular MIL Spec Connector ER 3C 3#8 SKT RECP | Circular MIL Spec Connector ER 12C 12#12 PIN RECP WALL |
| Manufacturer | Amphenol | Amphenol | Amphenol |
| Product Category | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| Number of Positions | 12 Position | 3 Position | 12 Position |
| Insert Arrangement | 28-51 | 28-3 | 28-51 |
| Contact Gender | Socket (Female) | Socket (Female) | Pin (Male) |
| MIL Type | MIL-DTL-5015 | MIL-DTL-5015 | MIL-DTL-5015 |
| Product | Receptacles | Receptacles | Receptacles |
| Shell Size | 28 | 28 | 28 |
| Shell Style | Wall Mount | Wall Mount | Wall Mount |
| Series | MS | MS | MS |
| Brand | Amphenol Industrial | Amphenol Industrial | Amphenol Industrial |
| Shell Plating | Olive Drab Chromate over Cadmium | Olive Drab Chromate over Cadmium | Olive Drab Chromate over Cadmium |
| Product Type | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| Subcategory | Circular Connectors | Circular Connectors | Circular Connectors |
| Factory Pack Quantity | - | 1 | - |