Prop constant force, comprising a housing, a rod with a spring, characterized in that the rod is formed stepwise, the bottom part of the rectangular section of the upper stage larger diameter is placed in the second hole of the base plate bearing the housing above the bottom of the rectangular cross section is formed self-locking external thread on which to screw the cap nut at the end of which formed a rectangular through hole for passage of rectangular cross section of the screw shank with a threaded end which threaded nesamotormozyascheysya vypo ying at the bottom of the shank, the threaded end of the screw is screwed into a threaded hole formed from the upper end of the upper stage larger rod diameter, while the cap nut with its outer cylindrical surface moves along the inner cylindrical surface of the support body and the spring is disposed between the support housing plate and the lower face the cap nut, wherein the steps of self-locking thread and nesamotormozyascheysya equal to each other, and the lower-stage small diameter rod is threaded.
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