The ornamental design for a shaft for medicalinstrument, as shown and described.
FIG. 1 is a left side perspective view of a shaft for medical instrument in accordance with the new design;
FIG. 2 is a left side view thereof;
FIG. 3 is a right side view thereof;
FIG. 4 is a top view thereof;
FIG. 5 is a bottom view thereof;
FIG. 6 is a rear view thereof; and,
FIG. 7 is a front view thereof.
FIGS. 1–5 shown as broken in the middle and embraced with a bracket are to indicate that no particular length is claimed.
The broken lines immediately adjacent to the shaded areas represent the bounds of the claimed design while all other broken line showing portions of the shaft for medical instrument is included for illustrating environmental structure and forms no part of the claimed design.