Electical connecting device

A locating face has plastically deformable shoulder on each locating face area lying tangentially opposite to each other, such that the locating face offset laterally with respect to the pilot portion when the pilot portion is inserted into a housing hole. The pilot section has radially elastic spigots mutually spaced in circumferential direction. Independent claims are also included for the following: (1) connector device usage method; and (2) fuel injector.