Used on hemtt family (heavy expanded mobility tactical trucks). 2a 1st end thread class 18 1st end thread quantity per inch weapon system essential nptf 2nd end thread series
3a 1st end thread class 12 1st end thread quantity per inch machined groove in flared end to accommodate seal ring per KC103 passivate surface treated anpt 2nd end thread series
3a 1st end thread class 12 1st end thread quantity per inch machined groove in flared end to accommodate seal ring per KC103 passivate surface treated anpt 2nd end thread series