120 mm x 310 mm x 72 mm ISO NU424 cylindrical roller bearings

The online 120 mm x 310 mm x 72 mm ISO NU424 cylindrical roller bearings parts store 6000 r/min Limiting speed gives 2.1 mm r1,2 min. you immediate NTN BEARING CORP.OF AMERICA access to a selection of more than 1.4 million 120 mm x 310 mm x 72 mm new, used, remanufactured.

What is NU424 bearing interchange？