Patent ID: 8327517

Claim:
A method for producing a vehicle brake hydraulic pressure control unit comprising: drilling a bottomed mounting hole portion in a base body comprising a brake fluid flow path so as to communicate with the flow path; inserting an assembled part which comprises a locking groove on an outer circumferential surface thereof into the mounting hole portion so that a lower end surface of the assembled part is brought into abutment with a bottom surface of the mounting hole portion; and forming a plastically deformed portion on a hole wall of the mounting hole portion by pressing the hole wall of the mounting hole portion towards the bottom surface of the mounting hole portion so as to bring the plastically deformed portion into engagement with the locking groove to thereby fix the assembled part in place, wherein: an upper side of the locking groove is cylindrical, an outside diameter at an upper side of the locking groove is made smaller than an outside diameter at a lower side of the locking groove which is cylindrical, and in a state where the plastically defaulted portion is formed, the cylindrical upper side of the locking groove protrudes from a bottom surface of a recessed portion of the mounting hole portion and an inner circumferential surface of the mounting hole portion makes contact with an outer circumferential surface of the cylindrical upper side of the locking groove.