I get what you are saying, but I got to tour a fastener fabrication and coating facility last year and they in fact do check every one! It was amazing, the simp

I get what you are saying, but I got to tour a fastener fabrication and coating facility last year and they in fact do check every one! It was amazing, the simplest machines would sort by size using graduated rails, old tech, but most of the stations used high speed photography and computer vision to validate each one.