| PartNumber | MS3100A28-21S | MS3100A28-21SX | MS3100A28-21SX-RES |
| Description | Circular MIL Spec Connector 37P #16 SKT CONTACTS | Circular MIL Spec Connector 37P Wall Mount FM Receptacle SKT 5015 | Circular MIL Spec Connector ER 37C 37#16 SKT RECP |
| Manufacturer | Amphenol | Amphenol | Amphenol |
| Product Category | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| RoHS | N | - | - |
| Number of Positions | 37 Position | 37 Position | - |
| Insert Arrangement | 28-21 | 28-21 | - |
| Contact Gender | Socket (Female) | Socket (Female) | - |
| MIL Type | MIL-DTL-5015 | MIL-DTL-5015 | - |
| Product | Receptacles | Receptacles | - |
| Shell Size | 28 | 28 | - |
| Shell Style | Wall Mount | Wall Mount | - |
| Series | MS 5015 | MS 5015 | - |
| Brand | Amphenol Industrial | Amphenol Industrial | Amphenol Industrial |
| Shell Plating | Olive Drab Chromate over Cadmium | Olive Drab Chromate over Cadmium | - |
| Product Type | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| Factory Pack Quantity | 1 | 1 | - |
| Subcategory | Circular Connectors | Circular Connectors | Circular Connectors |
| Tradename | 5015 | 5015 | - |
| Part # Aliases | MS310OA28-21S MS31O0A28-21S MS31OOA28-21S U61-168028-21S | MS310OA28-21SX MS31O0A28-21SX MS31OOA28-21SX | - |
| Unit Weight | 4.853697 oz | 4.853697 oz | - |