A double nut is provided in which a flange nut and an insert nut are coupled. The flange nut has a longitudinal axis and has, in an end region facing the insert nut, a stop surface and a wall surface. The insert nut has a longitudinal axis and has at least one snap element in an end region facing the flange nut. The stop surface extends over the at least one snap element radially in the direction of the longitudinal axis of the flange nut. The flange nut has a guide surface in the end region facing the insert nut which is disposed closer to the longitudinal axis of the flange nut than the wall surface.