Basis-RGB

Make hatch in illustrator. For using the same hatch patterns in many files, make a .ai file containing all the paterns you need. Use it for Copy/Paste as often as you like.

See: www.youtube.com/watch?v=y4J-gYnDrwE&t=208s

Also see: www.youtube.com/watch?v=oWIdYzd4Y1s&t=72s

Done