Used on aircraft starlifter c-141; aircraft, stratofortress b-52; velocity pool reparable piece parts; nimitz class cvn; helicopter, mh-53e; aircraft, stratolifter c-135; aircraft, galaxy c-5; aircraft, eagle f-15; forrestal class cv. 2a thread class right-hand 0.875" overall length 32 thread quantity per inch weapon system essential unef thread series