2b all threaded hole thread class 0.250" single connection inside diameter 2.650" overall length 0.920" overall width 32 all threaded hole thread quantity per inch rectangular w/bracket ptf-sae short single pressure connection thread series
2a single mounting facility thread class 0.400" single mounting facility thread length 1.435" overall length circular wafer, bushing mount unef single mounting facility thread series
2a single mounting facility thread class 0.437" single mounting facility thread length 2.245" overall length tap, circular, bushing mount unef single mounting facility thread series