2b single mounting facility thread class 4.278" overall length 2.812" overall width 24 single mounting facility thread quantity per inch tap, circuit selector unc single mounting facility thread series
Used on kidd class ddg, tarawa class lha, forrestal class cv, ticonderoga class cg (47), wasp class lhd, spruance class dd (963), nimitz class cvn, oliver perry class ffg, los angeles class ssn (688).. 2b all threaded hole thread class 2.432" overall width 32 all threaded hole thread quantity per inch weapon system essential unc all threaded hole thread series