Patent attributes
A fastener, in particular of a chassis component, has at least one sensor and at least one transmitter of a monitoring device for monitoring at least one mechanical fastening parameter. At least one power supply unit is associated with the transmitter, that the transmitter and the power supply unit are connected to one another by means of a switching contact, that an electrical connection can be closed by means of the switching contact, that the switching contact is designed in such a way that the electrical connection is open when the fastener is installed properly and is closed only when the fastener is released, and that the transmitter is supplied with current and transmits a signal only when the electrical connection of the switching contact is closed.