3a thread class right-hand 3.0620" overall length 0.3120" bore diameter 20 thread quantity per inch chromium inner member surface treated ball type unf thread series
2b thread class right-hand 3.2500" overall length 0.6245" bore diameter 18 thread quantity per inch cadmium surface treated shouldered ball type unf thread series
2a thread class right-hand 2.4380" overall length 0.3745" bore diameter 24 thread quantity per inch chromium inner member surface treated ball type unf thread series
3a thread class right-hand 1.1250" thread length 3.7812" overall length 14 thread quantity per inch means for relubrication cam follower unf thread series