3a thread class right-hand 1.8750" overall length 0.1895" bore diameter 24 thread quantity per inch chromium inner member surface treated ball type unf thread series
0.0610" first hole diameter 0.6150" overall length od ground to 0.7490 in. min, 0.7500 in. max dia, 0.0450 in. min, 0.0750 in. max lg one end 17c solid, plain, no outside flanges
3a thread class left-hand 1.9500" overall length 0.2495" bore diameter 24 thread quantity per inch keyway per NAS559 in shank ball type unf thread series