20 mm x 42 mm x 12 mm NKE 6004-RS2 deep groove ball bearings

The online 20 mm x 42 mm x 12 mm NKE 6004-RS2 deep groove ball bearings parts store 20 mm x 42 mm x 12 mm gives you immediate access to a selection of more than 1.4 million New Condition: new, used, remanufactured. LYC BEARING CORP.OF German LTD. 3.4 Static Load Rating (kN):

What is 6004-RS2 bearing cross reference？