Used on aircraft f-111(fms only),support equipment for b-52 aircraft. 2a thread class 0.615" overall length 0.250" overall width 40 thread quantity per inch uns thread series
2b single mounting facility thread class 6.345" 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 pressure connection thread class 5.875" overall length 0.438" single connection outside diameter 2.812" overall width rectangular unf single pressure connection thread series
2b single pressure connection thread class 0.438" single connection inside diameter 5.188" overall length 2.812" overall width rectangular unf single pressure connection thread series