2a thread class right-hand 3.850" overall length 0.250" overall width 56 thread quantity per inch additional polarization provided by cutting off pin number 33 flush with the mating surface unc thread series
2a thread class right-hand 4.600" overall length 0.340" overall width 56 thread quantity per inch two 0.098 in. diameter mounting holes spaced 3.800 in. apart on side unc thread series