The present disclosure discloses a threaded nut. The threaded nut comprises a body, a plurality of threaded blocks, and a pushing cover. The body comprises a first through hole and a mounting cavity connected to the first through hole. The plurality of threaded blocks is configured to move in the mounting cavity in a radial direction. An inner wall of each of the plurality of threaded blocks is disposed with an internal thread, and an outer wall of each of the plurality of threaded blocks is disposed with a first inclined surface and a first straight surface. The pushing cover is disposed with a second through hole, at least one second straight surface, and at least one second inclined surface.