3b 1st end thread class 20 1st end thread quantity per inch drilled for lockwire on tube end, one sleeve furnished passivate surface treated unjs 1st end thread series
3b 1st end thread class 28 1st end thread quantity per inch drilled 0.025 in. dia two places for lockwire passivate outside surface treated unjs 1st end thread series
3b 1st end thread class 18 1st end thread quantity per inch drilled 0.070 in. dia two places for lockwire passivate outside surface treated unjs 1st end thread series
3b 1st end thread class 24 1st end thread quantity per inch drilled 0.047 in. dia two places for lockwire passivate outside surface treated unjs 1st end thread series