A self-locking structure for a bulkhead connector, the bulkhead connector comprising a connector housing and a nut member being removably fitted to the connector housing to secure the bulkhead connector to a target plate body, wherein, an outer surface of the connector housing is formed with an outer thread, and an inner surface of the nut member is formed with an inner thread, wherein:
- the outer surface of the connector housing is provided with a groove, and the nut member is provided with an elastic locker;
- and
- upon a thread fit between the inner thread of the nut member and the outer thread of the connector housing, at least a portion of the elastic locker goes into the groove, to form a self-locking of the thread fit.