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.
0.3125 inches nominal bore diameter, haynes alloy,fscm 80357 mfr ref single material response roller material document and classification, rigid alignment type, 0.4370 inches nominal overall width, 0.5005 inches nominal overall outside diameter