Used on losangeles class ssn (688); ticonderoga class cg (47); nimitz class cvn; wasp class lhd; sturgeon class ssn (637); integrated underwater surveillance systems; arleigh burke class ssn; iff aims mk xii; oliver perry class ffg. 2a thread class right-hand 5.800" overall length 0.340" overall width 56 thread quantity per inch weapon system essential unc thread series