Used on support equipment, b-2 bomber.. 3a 1st end bulkhead thread class 12 1st end thread quantity per inch scope: this standard provides number for an, as, anodize surface treated unj 1st end thread series
Used on aircraft, (ac-130a, ac-130h, mc-130h, ec-130e, hc-130). 3a all ends thread class 12 1st end thread quantity per inch anodize surface treated unj 1st end thread series