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: The invention relates to a fastening device for holding together a stack of at least two panels, comprising a female piece in the form of a clasp, and a male piece having a part in the form of a head, and a part in the form of shaft with a cross section in the form of a cam which can be axially inserted into the clasp. The device includes a component for immobilization of the male piece in the female piece which is connected with clasp and is produced in the form of finger which can be moved by deliberate action between a position of engagement in a notch of the head of the male piece, and a position of disengagement from said notch.

Abstract: The invention concerns a joining element for releasable joining of at least two plate-like, at least partially overlapping parts in a joining region. The element has a cover mounted on the parts being joined, and a spring-loaded clip that passes through the cover and the parts being joined, forcing the cover against the parts.

Abstract: The invention relates to a fastening device for holding together a stack of at least two panels, comprising a female piece in the form of a clasp, and a male piece having a part in the form of a head, and a part in the form of shaft with a cross section in the form of a cam which can be axially inserted into the clasp. The device includes a component for immobilization of the male piece in the female piece which is connected with clasp and is produced in the form of finger which can be moved by deliberate action between a position of engagement in a notch of the head of the male piece, and a position of disengagement from said notch.