Element for connecting two parts

A connecting element for connecting two parts (1, 2) at a general connection plane (P), said element comprising:

• first means (4) for connecting the element (3) relative to a first of the parts (1) and second means (5) for connecting the element (3) relative to a second of the parts (2), said second means (5) comprising actuation members (6) which on relative movement of the parts along the connection plane (P) move the parts toward each other, said actuation members (6) comprising ridges which are inclined relative to the connection plane (P), said ridges having a fluke-like design so as to present, on movement of the parts (1, 2) in a first direction toward each other, a relatively small resistance to pressing of the ridges into the second part (2) but, on the contrary, present a relatively great resistance to withdrawal of the ridges from the second part (2) in a second opposite direction, said first means (4) being shaped to connect the element (3) relative to the first part (1) sufficiently rigidly to avoid loosening of the element from the first part (1) under influence of forces occurring when the parts (1, 2) are moved relative to each other along the connection plane (P) in order to make the actuation members (6) operate to tighten the parts (1, 2) against each other, said second means (5) comprising a plate portion (11), the actuation members comprising at least two of said ridges arranged and aligned with each other on the plate portion (11), on opposite flat sides of the plate portion, the second means (5) being shape to penetrate into a groove (12) in the second part (2), the actuation members (6) being adapted to grippingly cooperate with walls of the groove (12) in the second part (2), and the first means (4) comprising a pin adapted for reception in a hole (9) in the first part (1).