Corner Key for Fenestration Unit Frame

FIG. 1 is a front isometric view of a corner key for fenestration unit frame showing our new design.

FIG. 2 is a front elevation view thereof.

FIG. 3 is a rear elevation view thereof.

FIG. 4 is a left side elevation view thereof.

FIG. 5 is a right side elevation view thereof.

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in the drawings illustrate portions of the corner key for fenestration unit frame which form no part of the claimed design.