Product review (5 stars): It Fits My 15 - Plus Year Old Kenmore
Some reviewers have complained that this item did not fit their washers, but Sears wanted $28 for a replacement.  I figured it was worth a try for $5.  It fits and works perfectly - 10 second installation!  And, as other reviewers have noted, the hub is metal rather than the original plastic and will probably outlast the rest of the life of the machine.