FIG. 1 is a perspective view of a fastening unit having the ornamental design of the present invention.
FIG. 2 is a first side view of the fastening unit of FIG. 1.
FIG. 3 is an opposite side view of the fastening unit of FIG. 1.
FIG. 4 is a top view of the fastening unit of FIG. 1.
FIG. 5 is a bottom view of the fastening unit of FIG. 1.
FIG. 6 is an end view of the fastening unit of FIG. 1, shown at a larger scale.
FIG. 7 is an opposite end view of the fastening unit of FIG. 1, shown at a larger scale.
FIG. 8 is a perspective view of part of the fastening unit of FIG. 1.
FIG. 9 is a view from a first side of the part of FIG. 8.
FIG. 10 is a view from an opposite side of the part of FIG. 8.
FIG. 11 is an end view of the part of FIG. 8, shown at a larger scale.
FIG. 12 is an opposite end view of the part of FIG. 8, shown at a larger scale;
FIG. 13 is a perspective view of a part of the fastening unit of FIG. 1.
FIG. 14 is a view from a first side of the part of FIG. 13.
FIG. 15 is a view from an opposite side of the part of FIG. 13.
FIG. 16 is a top view of the part of FIG. 13.
FIG. 17 is a bottom view of the part of FIG. 13.
FIG. 18 is an end view of the part of FIG. 13; and,
FIG. 19 is an opposite end view of the part of FIG. 13.