Coupling bolt of a plug-in coupling, first component with the coupling bolt, associated plug-in coupling and connecting structure of two components

Coupling bolt of a plug-in coupling, including

• a. a connecting portion with which the coupling bolt is fastenable to or in a first component,
• b. a shaft extending from the connecting portion, with the shaft defining a longitudinal axis of the coupling bolt, wherein
• c. along the longitudinal axis in the direction of the connecting portion, the shaft comprises a pre-fixation portion and a fastening portion and
• d. along the longitudinal axis in the direction of the connecting portion, the pre-fixation portion comprises a first cylindrical head portion with a first diameter, an adjoining first, conically tapering transition portion and a first locking portion with a second diameter which is smaller than the first diameter, wherein
• e. the fastening portion comprises along the longitudinal axis in the direction of the connecting portion a second conically widening transition portion adjacent to the first locking portion, an adjoining second cylindrical head portion with a third diameter which is larger than the first diameter, a third conically tapering transition portion and a second locking portion having a fourth diameter corresponding to the second diameter.