3a thread class right-hand 1.2812" overall length 0.1900" bore diameter 28 thread quantity per inch heat treated race insert chromium inner member surface treated ball type unf thread series
18.0mm overall width 55.0mm bore diameter 3 holes equally spaced on outer ring located 0.255 in. min, 0.265 in. max from one face to centerline of hole 252a single row, non-locating, two lip inner ring, cylindrical outer ring, separable