Seam on texture

Hello. The model on the texture shows a seam that goes behind the sweep. I tried to make a reamer already, so it was not visible this seam, but it still goes behind the reamer (no red anymore) but in the end it still turns out that 2 straight lines longer than 1 straight (4 screenshot). This seam is not in blender, it only appears in the unity. What to do? I need to have this seam does not go beyond the scan, and 1 and 2 straight (4 screenshot) were the same length. Texture settings 3 screenshot

(i used a translator)

 

Texture sampling is not precise. You just need to add a few pixels of padding around your uv islands.