The ornamental design for a plugkit, as shown and described.
FIG. 1 is an exploded front perspective view of a plug kit showing our new design;
FIG. 2 is an exploded rear perspective view thereof;
FIG. 3 is a front perspective view thereof;
FIG. 4 is a rear perspective view thereof;
FIG. 5 is a front view thereof;
FIG. 6 is a rear view thereof;
FIG. 7 is a top view thereof;
FIG. 8 is a side view thereof; and,
FIG. 9 is a bottom view thereof.
The uneven-length broken lines in FIG. 1 and FIG. 2 demonstrate the order of assembly of the various parts of the design in the exploded views and form no part of the claimed design. The even-length broken lines represent unclaimed subject matter and form no part of the claimed design.