Used on aircraft, (ac-130a, ac-130h, mc-130h,ec-13. 3a all ends thread class 12 1st end thread quantity per inch anodize surface treated unj 2nd end thread series
Used on support equipment (se), b-2 bomber aircraft. 3a all ends thread class 1.170" overall length passivate body surface treated male coupling half unjf all ends thread series