OK, I don't know what to say. The first link is to the part number you gave and
the second link is to the specs for the stainless washers. Glad they are what you wanted.
https://www.fastenal.com/products/details/0172787?fsi=1
https://www.fastenal.com/content/pro...FEND.SS.00.pdf
These are the ones I got.
https://www.grainger.com/product/5TA...rders_WillCall
Bob