Abstract: An elastic terminal ferrule includes an annular body, a limit structure formed on the annular body, and a mating limit structure formed on the annular body for mating with the limit structure. When the annular body is in a natural state without radial expansion, the limit structure and the mating limit structure are spaced apart from each other in a circumferential direction. When the outer diameter of the annular body is expanded to a predetermined value, the limit structure and the mating limit structure abut against each other in the circumferential direction to prevent further radial expansion of the elastic terminal ferrule.