Abstract: A coupling part (1) for a fluid line coupling is provided with a locking element for locking in place a plug-in part that is to be introduced into the coupling (1), and with a checking element (8) to verify proper locking of the plug-in part. The checking element (8) is equipped with axially flexible spring arms (11, 12), which comprise an engagement structure (14, 15) devised to engage with a latching structure (15), and which, in a first checking position, block the checking element (8) from shifting into a second checking position if the plug-in part is not properly locked. After the second checking position has been assumed, as a result of the actuation by the plug-in part of an actuating structure formed on each spring arm (11, 12), the checking element (8) is out of engagement with the plug-in part, and it is therefore possible to remove the plug-in part from the coupling part in the second checking position of the checking part (8), as well, by actuating the locking element (5).

Abstract: A coupling part (1) for a fluid line coupling is provided with a locking element for locking in place a plug-in part that is to be introduced into the coupling (1), and with a checking element (8) to verify proper locking of the plug-in part. The checking element (8) is equipped with axially flexible spring arms (11, 12), which comprise an engagement structure (14, 15) devised to engage with a latching structure (15), and which, in a first checking position, block the checking element (8) from shifting into a second checking position if the plug-in part is not properly locked. After the second checking position has been assumed, as a result of the actuation by the plug-in part of an actuating structure formed on each spring arm (11, 12), the checking element (8) is out of engagement with the plug-in part, and it is therefore possible to remove the plug-in part from the coupling part in the second checking position of the checking part (8), as well, by actuating the locking element (5).