OK - so you're using two opposing loads, rather than a load and a constraint. I also notice that you've deleted the symmetry cut you had earlier.
Try setting the model up using a 3.6° cyclic symmetry and only one of the two threads, as I suggested. Cut it and constrain it on the plane that's shown just under the OK button.
Then check Review Total Load (you should have 8250 lbf in Z) and we can have a closer look at the area with the highest stress - do a screenshot of the results, zoomed right in, with Show Element Edges selected. As it stands, the model is going to have way too many elements if we use the mesh density we need to get good results.