The ornamental design for a replacementnozzle for a caulking tube, as shown and described.
FIG. 1 is a perspective view of a replacement nozzle for a caulking tube showing my new design;
FIG. 2 is a front view (back view is mirror image) thereof;
FIG. 3 is a side view (opposite side view is mirror image) thereof;
FIG. 4 is a top view thereof;
FIG. 5 is a bottom view thereof; and,
FIG. 6 is another perspective view thereof.
In FIG. 6, the broken lines showing of environmental structure for purposes of illustrating the replacement nozzle for a caulking tube in a condition of use. The broken lines and the structure they depict form no part of the claimed design.