2a thread class right-hand 0.2500" thread length 1.0312" overall length 28 thread quantity per inch hexagonal wrench socket in head cam follower unf thread series
3a thread class right-hand 0.4220" thread length 2.1100" overall length 20 thread quantity per inch lubricator in flanged end of stud cadmium stud surface treated cam follower unjf thread series