Adjusting nut for handbrake cable for use on vehicles of the Citroën 11CV and 15CV type. The nut allows precise adjustment of the tension of the handbrake cable. The component is used in the mechanical braking system and supports a consistent function of the parking brake. The threaded design enables removal and installation during service or replacement of the cable. The nut uses metric thread and fits a compact cable connection within the braking system of these vehicles. It serves as a small, functional link between cable, lever and bracket in the handbrake actuation.