3b 1st end thread class 18 1st end thread quantity per inch adapter, reducer, female beam seal to external swage tub size for 1st end is 0.625 in (nom) , passivate surface treated long w/ offset wrenching facility unjs 1st end thread series
3b 3rd end thread class 20 3rd end thread quantity per inch tee, external swage on run, female beam seal on side passivate surface treated tee unjs 3rd end thread series
Used on 2355-01-559-0791. 12 1st end thread quantity per inch industrial fitting straight thread connection a: male straight thread o-ring; connection b: female straightthread o-ring boss zinc surface treated