The ornamental design for a pre-tied tie knot, as shown and described.
FIG. 1 is a front elevation view of a pre-tied tie knot showing my new design;
FIG. 2 is a rear elevation view of the pre-tied tie knot;
FIG. 3 is a left side elevation view of the pre-tied tie knot;
FIG. 4 is a right side elevation view of the pre-tied tie knot;
FIG. 5 is a top plan view of the pre-tied tie knot; and,
FIG. 6 is a bottom plan view of the pre-tied tie knot.
The broken lines immediately adjacent to the edges of the claim represent boundaries of the claim and form no part of the claimed design. All other broken lines represent environmental structure that forms no part of the claimed design.