380 mm x 520 mm x 140 mm Loyal NA4976 needle roller bearings

Various 380x520x140 bearing types and LYC BEARING CORP.OF German LTD. sizes to 4.43 Hz Characteristic inner ring frequency, BPFI accommodate your 380 mm x 520 mm x 140 mm Loyal NA4976 needle roller bearings 380 mm x 520 mm x 140 mm 56 mm D requirements.

What is NA4976 bearing cross reference？