3b 1st end thread class 24 1st end thread quantity per inch drilled for two lockwire holes 180 deg apart passivate surface treated unjs 1st end thread series
3b 1st end thread class 14 1st end thread quantity per inch drilled for lockwire 0.070 in. dia 2 places passivate surface treated unjs 1st end thread series
3b 1st end thread class 20 1st end thread quantity per inch w/two lockwire holes, 3/64 in. id, drilled in outer periphery 5/16 in. from tube end passivate surface treated unj 1st end thread series