3a thread class right-hand 1.9370" overall length 0.2495" bore diameter 24 thread quantity per inch nas 513 keyway in shank chromium inner member surface treated ball type unf thread series
0.1875" bore diameter three ring assembly consisting of single row bearing within double row bearing; three equally spaced holes through flange on 0.750 in. nom bolt circle, 0.083 in. dia min to 0.085 in. dia max phosphate ball surface treated