Used on rtf33-p-3/5/9 (c/ec-135, b-52h) aircraft engine. tf33-pw-102 (c-135e, ec-135h/k/p), sh-60f asw carrier based helicopter. mh-53e helicopter. tf-33-p-7 (c-141 a/b) aircraft engine. lamps mk iii landing system helicopter.. 3b thread class right-hand 16 thread quantity per inch weapon system essential passivate surface treated
3a 2nd end thread class 12 1st end thread quantity per inch penetrant inspection per mil-i-6866 anodize inside surface treated un 1st end thread series