3 mm x 10 mm x 4 mm FAG 623 deep groove ball bearings

The online 3 mm x 10 mm x 4 mm FAG 623 deep groove ball bearings parts store gives you immediate access to a 1.50 mm Fillet Radius ra selection NTN BEARING CORP.OF CANADA LTD. 3 mm x 10 mm x 4 mm of more than 1.4 million new, used, remanufactured.

What is 623 bearing cross reference？