2a single mounting facility thread class 0.469" single mounting facility thread length 4.157" overall length tap, circular, bushing mount unef single mounting facility thread series
2b single mounting facility thread class 5.875" overall length 2.812" 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 7.813" overall length 2.812" overall width 24 single mounting facility thread quantity per inch tap, circuit selector unc single mounting facility thread series
5.156" overall length 4.031" overall width three 0.250 in. dia mtg holes on a t, two holes 2.500 in. c to c, one 2.750 in. hole on horizontal center line