A coupling system comprising at least one male component and one female component, in which system the male component is inserted into the female component along a longitudinal axis that is common to the male and female components and is retained removably by the female component:—the male component comprising an elongate body of substantially cylindrical shape;—the female component comprising an elongate body of substantially cylindrical shape and having a longitudinal internal bore of dimensions suited to the insertion and retention of the male component and an open top end;—the male component being inserted into the female component through a movement of longitudinal displacement combined at the same time with a rotation by a quarter of a turn;—the male component comprising notches for blocking rotation and displacement along a longitudinal axis, these notches collaborating with complementary stops in the female component.