Well I got the bearings and they are going back. These bearings are single thrust type, made to carry the load but only have thrust in one direction. Most information I can find says that they would be used as a pair to carry thrust in both directions. The MAC'S normal catalog price is 94-95$ which is in line with other suppliers low end bearing. These bearings have no country of origin and are hand scribed with the part number 7212. My guess is they may be made in India.
Live and learn! I have gotten other stuff from MAC's that was just fine, this is not one of them.
Thanks for the lead on the part number to look for and suggestion to check Ebay.