Cap and filler assembly for fuel tanks of automotive vehicles

A cap and filler assembly for fuel tanks of automotive vehicles, characterized in that the cap comprises substantially a pair of hollow cylindrical members of plastic material, one of which has at one end a control means and a circular flange for the closure of the filler opening and at the other end first snap means for engaging and retaining a cylinder lock and second snap means for receiving a complementary portion of the other of said hollow cylindrical members, said one hollow cylindrical member having also another cylindrical wall intergrally formed with said flange and terminating with a substantially square cross-section, whereas said other hollow cylindrical member has at one end snap means for engagement with the snap means of said one hollow cylindrical member and at the other end an integral cap portion having the same square cross-section as the square cross-section portion of said hollow cylindrical member and a seat for receiving the end of said cylinder lock, both of said hollow cylindrical members, when connected by snap action to each other being capable of being rotated with respect to each other by said cylinder lock, and the filler comprises a diaphragm provided with an opening having the same square cross-section as the square cross-section of the portions of the pair of members forming said cap.