Product review (5 stars): it screwed easily into place and has been working like a charm ...
I ordered this part after the original upper spray arm in our dishwasher started falling off midwash. It turns out that part of the original piece had disintegrated, so it would not stay attached to the top of the dishwasher any more. A short google search led me to this product, and when it arrived, it screwed easily into place and has been working like a charm ever since!