2b second mounting facility thread class right-hand second mounting facility 3.250" overall length 3.090" overall width 32 second mounting facility thread quantity per inch unc second mounting facility thread series
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 2.180" overall length 1.560" overall width 32 single mounting facility thread quantity per inch unc single mounting facility thread series
2a single mounting facility thread class 1.840" overall length 1.310" overall width 32 single mounting facility thread quantity per inch unc single mounting facility thread series
2b single mounting facility thread class 4.250" overall length 1.500" overall width 40 single mounting facility thread quantity per inch unc single mounting facility thread series
2b single mounting facility thread class 4.125" overall length 1.500" overall width 40 single mounting facility thread quantity per inch unc single mounting facility thread series
2b single mounting facility thread class 1.563" overall length 0.969" overall width 40 single mounting facility thread quantity per inch unc single mounting facility thread series