Front Caliper Carrier Bolts

[$chlitz]

So I went to do my front brakes a few weeks ago and for the life of me, couldn't get the caliper carrier bolts off. I tried some heat, lots of penetrating fluid, breaker bar, impact gun...split a Craftsman 16mm socket in the process, and eventually gave up. The one bolt I was working on actually started to round off just a bit, so I went ahead and ordered some replacement bolts just in case...part number 34116767217 (via RealOEM).

I'm going to take another stab at it tomorrow, but just realized that the new bolts are actually 18mm, not 16. Part number on the package is correct. Did they change at some point? Did I get the wrong bolts? RealOEM doesn't list the head size. Measurements do seem to be correct (M12-1.5x41). I just don't want to pull everything apart, possibly destroying the current bolts that are in there, only to find out I have the wrong bolts. I don't have a bolt to compare to since I have yet to get them out. Any input anyone has on this would be greatly appreciated. Thanks!