>>gnabgi+(OP)
I'd be interested to know how BMW manufactures those screws. The patterns in the metal in the image suggest the entire hole was drilled out? The deepest part has circular marks inside that looks like the marks left by a facing tool on a lathe or similar. Then I guess the two wedges were inserted and the whole screw faced?
>>cucumb+6w
Why not? A properly set up CNC machining center would turn those out by the bucketload. That's precisely the sort of thing that BMW does regularly with exterior details, no reason why they couldn't do it for a batch of bolts.
>>jacque+az
You don't use CNC for making a billion individual screws. These would have their heads formed by being stamped in a die, just like phillips, robertson, security torx or any other screw heads.