Used on f-22 raptor. fitting - electrical conduit thread size 1.750 - 16 unj - 3a; tube size 1.500; o ring size; material ams qq-a-225/8 6061-T651 aluminum; 2.500 dia. rod
Used on ch-53 a/d/e helicopter. 3a 2nd end thread class 12 1st end thread quantity per inch fitting, tee, standard passivate surface treated unj 1st end thread series