3a thread class left-hand 2.1090" overall length 0.2495" bore diameter 24 thread quantity per inch keyway in shank for std nas 513 lockwasher chromium inner member surface treated ball type unf thread series
3a thread class right-hand 3.7350" overall length 0.7495" bore diameter 16 thread quantity per inch keyway in shank for std nas 513 lockwasher ball type unf thread series
0.1560" first hole diameter 0.8700" overall length flange end of bore c'bored 0.0620in., one (1) side of flange flatted 0.5012 to 0.5019 in. radius 22c solid, external flange one end