3b thread class right-hand 1.8125" overall length 0.3120" bore diameter 24 thread quantity per inch cadmium rod end body surface treated ball type unf thread series
3a thread class right-hand 2.7750" overall length 0.3745" bore diameter 20 thread quantity per inch hole in shank end 0.218 in. dia by 1.060 in. deep cadmium rod end body surface treated ball type unf thread series