76,2 mm x 127 mm x 31,001 mm NSK 42688/42620 tapered roller bearings

76,2 mm x 127 mm x 31,001 mm NSK 42688/42620 tapered roller bearings SEARCH NTN PRECISION AXLE CORP. - Whether it's agriculture or construction equipment your working on, Has thetapered roller bearings 76,2 mm x 127 mm x 31,001 mm you need.

What is 42688/42620 bearing interchange？