A single or multiple-row antifriction bearing used with or without inner or outer races characterized by relatively small size rollers usually not ranging above 0.250 inch (6.35mm) diameter and generally longer in length in relation to diameter.
19.88 millimeters minimum and 20.00 millimeters maximum overall width, 21.989 millimeters minimum and 22.002 millimeters maximum overall outside diameter, rigid alignment type, 9.992 millimeters minimum and 10.002 millimeters maximum bore diameter, steel overall material