The ornamental design for a conduitnipplegrounding bushing, as shown and described.
FIG. 1 is a front perspective view of the conduit nipple grounding bushing, showing my new design.
FIG. 2 is a front view thereof.
FIG. 3 is a rear view thereof.
FIG. 4 is a right side view thereof.
FIG. 5 is a top view thereof.
FIG. 6 is a left side view thereof; and,
FIG. 7 is a perspective view thereof, shown with environment.
The dashed lines shown in FIG. 7 are for the purpose of illustrating a grounding lug attached to the conduit nipple grounding bushing that form no part of the claimed design.