The clip comprises a first part (2) on a second part (3) with a head (5) defined by a support face (8) adapted to co-operate with the first part. The device also comprises an elastically deformable part (7) of the L form extending from the face and cooperating with second part. The first branch (12) of the L is deformable and comprises a widened part (15). This part cooperates with a complementary support surface (16) on the first part. <IMAGE>
