3a thread class right-hand 6.3000" overall length 0.2500" bore diameter 28 thread quantity per inch cadmium shaft surface treated single row, ball unf thread series
16.0mm overall width 50.0mm bore diameter same serial no. marked on both races 252e single row, one-direction locating, two lip inner ring, one lip outer ring, separable
0.9448" overall width 1.5748" bore diameter permanently mark same serial no. on all bearing elements 92b counterbored outer rings, non-separable, back to back mounting