I don't see why you are making a big fuss over this as no one else seems to have a problem. Maybe they are not the "perfect" bolt to your standards.

you posted this pic which seems to show a different size head.
when i asked you didn't answer the question but just said they where within tolerance.
i still don't know the head size. your drawing shows sharp edges but your screws don't.
china manufacturers are often loose on there tolerances so i don't know if it is between the .720-.740 you have listed.
all you had to do was mic a screw and post the size to my original question. this shouldn't be a hard question.