De minimis is one of the two mechanisms that carry US jurisdiction into goods manufactured entirely abroad. Below the threshold the foreign item is outside the Export Administration Regulations; above it, the item and its onward movement are inside them.
Because the test is a percentage of value, it can be engineered. Published enforcement matter describes sourcing decisions taken specifically to keep controlled US content under a threshold, and the analytical response is to look at bills of materials rather than at the finished article’s declared origin.