31191  Snack Food Manufacturing 

This industry comprises establishments primarily engaged in one or more
of the following: (1) salting, roasting, drying, cooking, or canning
nuts; (2) processing grains or seeds into snacks; (3) manufacturing
peanut butter; and (4) manufacturing potato chips, corn chips, popped
popcorn, pretzels (except soft), pork rinds, and similar snacks.