This bolt is designed for mounting a door opener or window mechanism in classic Citroën 11CV and 15CV models. The component provides secure fastening of the mechanism to the body or door frame. The metric thread and short shank dimensions support proper load distribution within the mechanical system. The bolt helps maintain accurate alignment of moving parts and reduces unwanted play. This supports smooth operation of the opening and closing mechanism. The product is matched to existing constructions and contributes to consistent function of the door or window assembly in these vehicles.