We claim the ornamental design for a head rail for a covering for an architectural opening, as shown and described.
FIG. 1 is a front isometric view of a head rail for a covering for an architectural opening in accordance with the present design.
FIG. 2 is a rear isometric view thereof.
FIG. 3 is a front elevation view thereof.
FIG. 4 is a rear elevation view thereof.
FIG. 5 is a right side elevation view thereof.
FIG. 6 is a left side elevation view thereof.
FIG. 7 is a top plan view thereof; and,
FIG. 8 is a bottom plan view thereof.
The dash-dash broken lines illustrate features of the head rail for a covering for an architectural opening that form no part of the claimed design. The dash-dot-dash broken lines illustrate a boundary between claimed features and non-claimed features.
The break lines shown in FIGS. 1-4 and 7-8 symbolize breaks in the length of the article in which the claimed design is embodied. The appearance of any portion of the article between the break lines forms no part of the claimed design.