An assembly locking device adapted to a thread (RG; FG) of a thread shaft of a thread bolt with a bolt head, so that the assembly locking device is positionable on the thread (RG; FG) of the thread shaft in a loss-proof manner and the thread bolt with assembly locking device is arrangeable in a pull-out-proof manner inserted in a component opening , wherein the assembly locking device comprises the following features: a. a cylindrical helix comprised of a plurality of helically wound turns of a wire, which, preferably in the pitch direction of a holding turn, comprises a first end and a second end , b. starting at the first end of the helix , at least one holding turn is provided, which extends over an angular range of greater than 360° about a central longitudinal axis (L) of the helix and comprises a positive pitch P H as well as an inner diameter D H , c. following the holding turn , a transition turn is provided which extends over an angular range of at least 65° about the central longitudinal axis (L) of the helix and comprises a smaller pitch P U as well as an increasing inner diameter D U compared to the holding turn , and d. adjacent to the second end of the helix , a blocking turn is provided which extends over an angular range of at least 65° about the central longitudinal axis (L) of the helix and comprises a negative pitch P B compared to the holding turn , so that at least an end portion of the blocking turn is elastically displaceable in the axial direction of the central longitudinal axis (L) between an insertion position (EP) and a blocking position (BP), wherein the end portion of the blocking turn forms the second end of the helix in the insertion position (EP) and is arranged radially outwardly of the transition turn and/or the holding turn in the blocking position (BP). a. a cylindrical helix comprised of a plurality of helically wound turns of a wire, which, preferably in the pitch direction of a holding turn, comprises a first end and a second end , b. starting at the first end of the helix , at least one holding turn is provided, which extends over an angular range of greater than 360° about a central longitudinal axis (L) of the helix and comprises a positive pitch P H as well as an inner diameter D H , c. following the holding turn , a transition turn is provided which extends over an angular range of at least 65° about the central longitudinal axis (L) of the helix and comprises a smaller pitch P U as well as an increasing inner diameter D U compared to the holding turn , and d. adjacent to the second end of the helix , a blocking turn is provided which extends over an angular range of at least 65° about the central longitudinal axis (L) of the helix and comprises a negative pitch P B compared to the holding turn , so that at least an end portion of the blocking turn is elastically displaceable in the axial direction of the central longitudinal axis (L) between an insertion position (EP) and a blocking position (BP), wherein the end portion of the blocking turn forms the second end of the helix in the insertion position (EP) and is arranged radially outwardly of the transition turn and/or the holding turn in the blocking position (BP). <EOS>