Connecting element and connecting arrangement

A connecting arrangement, comprising:

• a first component having a recess formed therein with a sealing surface;
• a second component each being formed with a passage opening;
• and
• a connecting element, having:
• a closure head for abutment against said first component;
• a closure foot for abutment against said second component and for bracing said second component against said first component in a rotated final installation position of said connecting element;
• a stem portion extending between said closure head and said closure foot and axially spacing said closure head and said closure foot apart from one another in the longitudinal direction of said stem portion;
• said closure head having a sealing surface extending in the longitudinal direction of said stem portion, for sealing abutment against said sealing surface of said recess formed in said first component;
• wherein, in a preassembly position, said connecting element is held on said first component and said closure foot is located in said passage opening of said first component;
• wherein said closure head has a perimeter wall and is configured with said perimeter wall to be radially elastic;
• wherein, in a final installation position, with said passage openings axially aligned with one another, said connecting element reaches through said passage openings of said first and second components and a connection between said first and second components is produced when said connecting element is rotated from an angular insertion position into an angular end position;
• wherein a pair of sealing surfaces is formed in said first component between said connecting element and said first component, with said sealing surface of said closure head sealing against said sealing surface in said recess of said first component;
• wherein said closure head is formed with an annular space and radial inner struts formed in said annular space;
• wherein said closure foot is formed with lock arms extending radially with respect to the longitudinal axis of said stem portion and having lock flanks running V-shaped or wedge-shaped with respect to one another and a lock apex connecting said lock flanks and facing said closure head;
• wherein one of said lock flanks of at least one of said lock arms runs parallel to the longitudinal axis of said stem portion and another one or said lock flanks of said lock arm runs at an angle obliquely with respect to the longitudinal axis of said stem portion;
• and
• wherein said closure head with said sealing surface, said closure foot, and said stem portion together form a single-component plastics component.