Threaded rivets (Rivnuts) are primarily used to:

Threaded rivets, commonly known as Rivnuts, are designed to provide a strong threaded interface in materials that may not be suitable for traditional tapping due to certain limitations, such as reduced material thickness or lack of access to both sides of a workpiece. The primary purpose of Rivnuts is to facilitate the attachment of parts or components with screws to sheet metal, enabling a reliable and secure connection.

Using Rivnuts allows for the assembly of components in applications where conventional fastening methods may not be feasible. They effectively distribute the load across the underlying material, reducing the risk of damage while providing a robust fastening solution. This is especially useful in sheet metal applications where maintaining structural integrity while allowing for disassembly and repair is critical.

The other options suggest functionalities that are not the primary purpose of Rivnuts. While they can contribute to aesthetics or weight reduction indirectly, these are not their main intention. Rivnuts mainly serve as a reliable means to create a screw attachment point in thin or inaccessible materials, making option B the most accurate representation of their primary use.