Abstract: An anti-rotation connector for releasable coupling a field device with an inner room of a fluidic component via an anti-rotation counter-connector includes a connector stub, an access channel, and a first connector-sided anti-rotation structure. The connector stub has a stub body that extends along a connector axis. The access channel is coaxial with respect to the connector axis and extends through the stub body. The first connector-sided anti-rotation structure is arranged at a lateral stub body surface and is rotationally symmetric of order two with respect to the connector axis. The first connector-sided anti-rotation structure is engageable with a first counter-connector-sided anti-rotation structure of the anti-rotation counter-connector by relatively displacing the connector and the counter-connector towards each other. A locking connector for the releasable coupling includes the connector stub, the access channel, and a circumferential locking structure that is arranged at a lateral stub body surface.