Used on spruance class dd (963); kidd class ddg; forrestal class cv; oliver perry class ffg; yellowstone class ad-41. 2a single mounting facility thread class 2.430" overall length 1.620" overall width unc single mounting facility thread series
2a single mounting facility thread class 0.375" single mounting facility thread length 3.313" overall length 1.734" overall width circular wafer, bushing mount unef single mounting facility thread series