1, thrust roller bearings 2, ABEC-1,material:bearing steel 3, 30202 to 30218,30303 to 30318 4, 32004X to 32018X, 1, thrust roller bearings2, ABEC-1,material:bearing steel3, 30202 to 30218,30303 to 303184, 32004X to 32018X,5, LM1749/10 L68149/10,etc. thrust roller bearings