Patent attributes
An attachment element (1; 31; 51), includes at least one engagement member (7.1; 7.2; 38.1; 55) insertable in a mounting opening (3.1; 3.2; 53) of a hollow body (2.1; 2.2; 41.1; 54) in its first position and engaging holding projections (4.1; 4.2; 40.1; 40.2; 60.1; 60.2) provided on the hollow body (2.1; 2.2; 41.1; 54) in its second position, at least one stop (6; 52) for engaging outer end sides of hollow body rims which limit the mounting opening (3.1; 3.2; 53), and at least one fastening element (8.1; 8.2; 32.1; 32.2; 57) having an expansion body (16.1; 33.1; 59) for laterally displacing the at least one engagement member (7.1; 7.2; 38.1; 55) from the first position thereof to the second position.