Precision resistor for current sensor and current sensor unit

The invention relates to a measuring resistor (107) for a battery pole, which is designed bolt-shaped essentially of a central portion (127), two opposite end portions (147, 167), and one each between the central portion (127) and one of the end portions (147 having 167 arranged) sealing surface (177), wherein an outer wall of each sealing surface (177) has two adjacently arranged conical portions (701, 702) has.