Fixing element for inserting into a longitudinal cavity of a carrier

A fixing element of plastic for insertion into an oblong hole of a carrier plate, comprising:

• a foot part including a head corresponding in size to the edge of the oblong hole;
• a shaft adapted to the width of the oblong hole, such that the fixing element can be locked in the oblong hole after the insertion of the head by a quarter turn under elastic deformation of the shaft, wherein the shaft includes a middle strut connecting to the head and the strut corresponds to the width of the oblong hole;
• a shank formed on each of the two edges of the middle strut at a right angle and in opposite directions, such that the shanks are adapted to be elastically bent towards the middle strut during the screwing in of the shaft through the edge of the oblong hole and after a quarter turn return to their original position due to the elastic return force of the plastic;
• pressing ramps on two outer ends of the head for extending, during screwing in, over the edge of the oblong hole, to prevent a rotation in the opposite direction;
• and
• a countershank formed on each of the two edges of the middle strut in opposite directions.