Used on los angeles class ssn (688), forrestal class cv, sturgeon class ssn (637), spruance class dd (963), nimitz class cvn, ticonderoga class cg (47), virginia class cgn (41), kidd class ddg; radar set, lightweight 3d (an/tps-59); an/uyk-7(v) sonar/fire control tactical computer. 2a thread class 32 thread quantity per inch weapon system essential uns thread series
