The ornamental design for a plumbing spout, as shown and described.
In a preferred embodiment, the nature of this product is a plumbing fitting in the form of a spout portion of a faucet for washing items or body parts.
FIG. 1 is a right, top, frontal perspective view of a plumbing spout according to our new design;
FIG. 2 is a right side elevational view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a rear elevational view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken line representations in the figures are for the purpose of illustration only, and form no part of the claimed design.