The ornamental design for a fishinglinethreadingdevice, as shown and described.
FIG. 1 is a front perspective view of a fishing line threading device, shown with a gripping head extended from a sleeve of the fishing line threading device with the gripping head in an expanded configuration;
FIG. 2 is a left side elevation view thereof;
FIG. 3 is a front elevation view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a right side elevation view thereof;
FIG. 6 is a rear elevation view thereof;
FIG. 7 is a top plan view thereof, shown with the gripping head withdrawn into the sleeve, which is shown in cross section taken along the lines 7-7 of FIG. 1, with the gripping head in a contracted configuration within the sleeve; and,
FIG. 8 is an exploded perspective view thereof.
The broken lines depict environmental structure and are for illustrative purposes only and form no part of the claimed design.