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| PartNumber | MS3121P20-41P | MS3121P20-39P | MS3121P20-16S |
| Description | Circular MIL Spec Connector CONN ASSEMBLY | Circular MIL Spec Connector CONN ASSEMBLY | Circular MIL Spec Connector CONN ASSEMBLY |
| Manufacturer | Amphenol | Amphenol | Amphenol |
| Product Category | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| Number of Positions | 41 Position | 39 Position | 16 Position |
| Insert Arrangement | 20-41 | 20-39 | 20-16 |
| Contact Gender | Pin (Male) | Pin (Male) | Socket (Female) |
| MIL Type | MIL-DTL-26482 | MIL-DTL-26482 | MIL-DTL-26482 |
| Product | Receptacles | Receptacles | Receptacles |
| Shell Size | 20 | 20 | 20 |
| Shell Style | In-Line | In-Line | In-Line |
| Mounting Style | Wire | Wire | Wire |
| Termination Style | Crimp | Crimp | Crimp |
| Contact Plating | Gold | Gold | Gold |
| Contact Material | Copper Alloy | Copper Alloy | Copper Alloy |
| Series | MS | MS | MS |
| Mounting Angle | Straight | Straight | Straight |
| Brand | Amphenol Industrial | Amphenol Industrial | Amphenol Industrial |
| Shell Plating | Olive Drab Chromate over Cadmium | Olive Drab Chromate over Cadmium | Olive Drab Chromate over Cadmium |
| Mating Style | Bayonet | Bayonet | Bayonet |
| Product Type | Circular MIL Spec Connector | Circular MIL Spec Connector | Circular MIL Spec Connector |
| Shell Material | Aluminum Alloy | Aluminum Alloy | Aluminum Alloy |
| Subcategory | Circular Connectors | Circular Connectors | Circular Connectors |