MIL-DTL-5015 is a classic military circular connector with a bayonet coupling, used since the 1940s in military and industrial applications. The AN and MS designations are based on this specification.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | Pin A | Contact A signal or power | I/O |
| 2 | Pin B | Contact B signal | I/O |
| 3 | Pin C | Contact C signal | I/O |
| 4 | GND | Ground contact | GND |