2a single mounting facility thread class 0.417" single mounting facility thread length 4.002" overall length tap, circular, bushing mount unef single mounting facility thread series
3.251" overall length 1.750" overall width 32 single mounting facility thread quantity per inch tap, square frame unc single mounting facility thread series
2b single pressure connection thread class 5.188" overall length 2.812" overall width 20 single pressure connection thread quantity per inch rectangular unf single pressure connection thread series