Securing apparatus for a threaded rod of a sanitary fitting, comprising: a housing; a nut which is arranged in the housing so as to be able to be rotated about an output shaft of the securing apparatus and in the housing so as to be displaceable along the output shaft between an engagement position and a release position, wherein said nut is formed from two or more segments (41; 42) which are arranged so as to be able to be moved relative to each other, wherein the two or more segments (41; 42) form for the threaded rod a receiving member which extends around the output shaft and wherein at least one of the two or more segments (41; 42) is constructed as a threaded segment (41; 42) with a segment inner thread (411; 421); and an activation element, via which the nut can be rotated about the output shaft; wherein the securing apparatus is constructed in such a manner that the nut can be displaced by activating the activation element independently of the threaded rod from the release position into the engagement position, and wherein the activation element comprises a sleeve, wherein the sleeve can be rotatably driven from the outer side and has a hollow space and wherein the nut is displaceably received along the output shaft in the hollow space of the sleeve, characterised in that the at least one threaded segment (41; 42) or at least one of the threaded segments (41, 42) is supported by at least one, preferably by two pivot pins which protrude radially with respect to the output shaft and which form a pivot axis which is transverse relative to the output shaft, so as to be able to be pivoted in the sleeve and so as to be rotationally secure with respect to a rotation about the output shaft with the sleeve. a housing; a nut which is arranged in the housing so as to be able to be rotated about an output shaft of the securing apparatus and in the housing so as to be displaceable along the output shaft between an engagement position and a release position, wherein said nut is formed from two or more segments (41; 42) which are arranged so as to be able to be moved relative to each other, wherein the two or more segments (41; 42) form for the threaded rod a receiving member which extends around the output shaft and wherein at least one of the two or more segments (41; 42) is constructed as a threaded segment (41; 42) with a segment inner thread (411; 421); and an activation element, via which the nut can be rotated about the output shaft; wherein the securing apparatus is constructed in such a manner that the nut can be displaced by activating the activation element independently of the threaded rod from the release position into the engagement position, and wherein the activation element comprises a sleeve, wherein the sleeve can be rotatably driven from the outer side and has a hollow space and wherein the nut is displaceably received along the output shaft in the hollow space of the sleeve, characterised in that the at least one threaded segment (41; 42) or at least one of the threaded segments (41, 42) is supported by at least one, preferably by two pivot pins which protrude radially with respect to the output shaft and which form a pivot axis which is transverse relative to the output shaft, so as to be able to be pivoted in the sleeve and so as to be rotationally secure with respect to a rotation about the output shaft with the sleeve.