2a single mounting facility thread class 0.437" single mounting facility thread length 2.385" overall length tap, circular, bushing mount unef single mounting facility thread series
2b first mounting facility thread class 4.220" overall length 3.250" overall width operate time is variable, controlled pneumatically by a calibrated dial unc first mounting facility thread series
2a single mounting facility thread class right-hand single mounting facility 1.109" overall length 0.859" overall width 48 single mounting facility thread quantity per inch unc single mounting facility thread series