Used on forrestal class cv; oliver perry class ffg; sturgeon class ssn (637); spruance class dd (963); tarawa class lha; ticonderoga class cg (47); arleigh burke class ddg; austin ship class lpd-4 amphibious transport docks; sirius class t-afs 8; nimitz class cvn. weapon system essential
2b single mounting facility thread class 5.188" overall length 2.547" overall width 24 single mounting facility thread quantity per inch tap, circuit selector unc single mounting facility thread series
2a single mounting facility thread class right-hand single mounting facility 1.625" overall length 1.406" overall width 32 single mounting facility thread quantity per inch unc single mounting facility thread series