Product review (1 stars): Knob does not work for all washers even if it says correct part number
Although the knob is supposed to work with my washer, it just does not fit.  I have read this from other customers as well but decided to take the chance.  Bad idea.  Somewhere along the line the stem in the washer changed size and since it is such an old machine, no one appears to have bothered to do the research.  The washer uses a 1/4 in wide shaft with 20 threads per inch.  THAT is what we should have looked for.  We ended up getting a simple wing nut with that spec and it is working fine for us.