The invention relates to a housing component (2) of a housing (10) of a vehicle device (1) conducting pressure medium, with at least one connecting bore (12, 14), which is provided with an internal thread, for the screwing-in of a connecting element provided with an external thread, for feeding the pressure medium to, and/or for removing same from, the device (1). The invention provides that the material of the housing component (2) is composed, at least in the region of the connecting bore (12, 14), of a thermoplastic in the form of PPA (polyphthalamide). This results in a release moment of the threaded connection after temperature ageing, said release moment being greater than 25% of the failure moment.