A fastening device for attaching a module element to a support structure in an aircraft includes a stud having a first end defining a broadened head configured to engage the support structure, a section which adjoins the head and defines a first lateral dimension and a second lateral dimension that is larger than, and is disposed at least substantially perpendicularly to, the first lateral dimension, and a second opposite end connected to a lever which is movable between open and closed positions relative to the stud. A bushing, which may be electrically conductive, is provided on and longitudinally movable along the stud, which is configured to contact the support structure and to support an outer wall of the module element. An eccentric may be actuated by the lever and is responsive to movement of the lever into the closed position to move the bushing along the stud towards the head.