Used on misc bulk items. 3b 1st end thread class 18 1st end thread quantity per inch adapter, female beam seal to weld female beam seal to socket weld grooved unjs 1st end thread series
Used on v-22 aircraft. 3a 1st end thread class 4 2nd end bolt hole quantity 14 1st end thread quantity per inch cadmium surface treated unjf 1st end thread series
Used on b-2 bomber aircraft. 3a 2nd end thread class elbow, reducer, 45 degree flareless tube to swivel anodize surface treated unjf 2nd end thread series