Parts supplied by AppliancePartsPros to not only replace the bolt but put in a new upper agitator cam and dogs. This is the second time I have used this company to provide perfect replacement parts to keep my "vintage" Whirlpool top-loader washer that I bought used 13 years ago working like new. Actual parts replacement would have taken less than 15 minutes with only a 17mm socket wrench with an extension, but I spent an additional 30 minutes thoroughly cleaning the upper and lower agitators before reassembling.