A back body for a cable-connector assembly includes: an annular central portion; an annular mating portion that merges with one end of the central portion and is configured to mate with an outer conductor extension of a coaxial connector; and a plurality of fingers that extend axially from an opposite end of the central portion, the fingers being configured to flex inwardly to engage a jacket of a coaxial cable. The central portion, the mating portion, and the fingers define a bore configured to receive the coaxial cable. A radial clamp is configured to apply radially-inwardly directed pressure to the fingers.