The ornamental design for an adjustablehangingdevice, as shown and described.
FIG. 1 is a top, front, and right side perspective view of an adjustable hanging device showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a left side elevational view thereof; and,
FIG. 6 is a right side elevational view thereof.
The broken-line disclosure is understood to represent portions of the article in which the claimed design is embodied, but which form no part of the claimed design, as well as environment shown for illustrative purposes only. Portions of the article are shown broken away to indicate unclaimed length, and broken lines along the edge of a claimed surface are understood to represent an unclaimed boundary between claimed and unclaimed areas.