After the nut is removed, this is how the separate pieces are installed. Arrow 1 points to the fiber washer that prevents wear on the U-shaped tab riveted to the bottom of the window frame. Arrow 2 points to the second fiber washer on the top side of the bracket. Pulling the stud out of the frame will release all the washers. We placed all our small parts in a plastic cup to prevent items from getting up and walking away.