2a single mounting facility thread class right-hand single mounting facility 1.594" overall length 1.500" overall width 32 single mounting facility thread quantity per inch unc single mounting facility thread series
2b single mounting facility thread class 5.363" overall length 3.688" overall width 20 single mounting facility thread quantity per inch tap, circuit selector unc single mounting facility thread series
2b single mounting facility thread class 2.375" overall length 3.000" 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 0.440" single mounting facility thread length 3.540" overall length tap, circular, bushing mount unef single mounting facility thread series