Abstract: A device for mounting components, such as metal sheets, on one another, includes a clamp with external elastic U-shaped tongues that slide over an edge of a first component, and a section that is located between the tongues and includes an internal thread, and a screw that can engage the internal thread for mounting a second component on the first component. The screw has a thread pitch suitable for plastic materials and a correspondingly small flank angle. The internal thread has a region that is tapped, is located in, and helically extends from the central clamp section. The internal thread has more than one flight and one thread pitch for engaging the thread pitch of the screw thread.

Abstract: A plug for the sealing closure of an opening in a sheet includes an integral body including a cap portion having an annular shirt portion and a cover portion connected to one end of the shirt portion. The body further includes a flange portion extending obliquely outwardly and downwardly and an annular sealing surface approximately at the same level as the connection of the cover portion to the shirt portion and below the connection of the flange portion. The plug body can be urged into the opening by an axial pressure. An outward pivoting of the flange portion upon insertion of the plug body into the opening exerts a radial expansion force and/or a pivoting force on the sealing surface so that the body's material in the area of the sealing surface is formed against the other side of the sheet.

Abstract: A plug for the sealing closure of an opening in a sheet of a body or the bottom of an automobile, comprising an integral body which includes a cap portion having an annular shirt portion and a cover portion connected to one end of the shirt portion, with the shirt portion tapering on the outer side towards the free end thereof and the free end having an outer diameter which is smaller than the diameter of the opening a flange portion approximately at the level of the cover portion which extends obliquely outwardly and downwardly an annular sealing surface approximately at the same level as the connection of the cover portion to the shirt portion and below the connection of the flange, the height of the sealing surface being larger than the thickness of the sheet, the outer diameter of the sealing surface being slightly larger than the diameter of the opening with the cover portion and its connection to the shirt portion being formed such that the plug body can be urged into the opening by an axial pressure on