The ornamental design for a panelfasteningpin, as shown and described.
FIG. 1 is a top plan view of a first embodiment of a panel fastening pin
showing my new design;
FIG. 2 is a front elevational view thereof, the rear elevational view
thereof being a mirror image;
FIG. 3 is a right side elevational view thereof, a left side elevational
view thereof being a mirror image;
FIG. 4 is a bottom plan view thereof; and,
FIG. 5 is a bottom plan view of a second embodiment of a pin showing my new
design, the rest of views of the second embodiment is the same as those of
the first embodiment.