771 models in the NK series, 5–24 mm bore. Every row links to the full specification page and to the cross-reference page of that model.
NK series bearings follow the ISO dimension plan for this family, so a given number is dimensionally interchangeable between brands - see the cross-reference to confirm. Choose the suffix for your duty: shields for dry, clean positions, contact seals for wet or dusty ones, and a larger clearance class where the fit or temperature demands it.
Other Needle Roller Bearings series: K · RNA · NA · HK · BK · KT · IR · NKI