A plug assembly with strain relief includes a housing and a clamping basket which has radially movable clamping fingers. The clamping basket defines an axis and is constructed to allow insertion of a cable into the housing in a direction of the axis. A rotary sleeve is supported on the housing for rotation but substantially fixed in an axial position with respect to the housing. The rotary sleeve is hereby configured to move an element (e.g. the clamping basket itself or a pinch ring) in the axial direction, when rotated, to thereby modify a radial position of the clamping fingers.