FIG. 1 is a perspective view of a hub for a surgical instrument showing our new design;

FIG. 2 is a side elevation view thereof;

FIG. 3 is a side elevation view thereof, opposite that shown in FIG. 2;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a rear elevation view thereof;

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

FIG. 7 is a bottom plan view thereof.