metric flareless connectionsdin 3901/3902l 3901/3902s the most popular ... in both a light and heavy series and is designed for mediumand high pressure ... respectively the two series have different parallel thread sizes in relationship ... to the nominal tube outsidediameter but share a common sleeve this style ... parallel thread the series can be determined by measuring the seat counterbore which ... is the approximate tube outsidediameterand comparing it to the thread size ... compare these di-mensions to those shown in figure 6 to determine ... series the nominal sleeve size is taken directly from the tube outsidediameter ... dimension application metric metric thread male ... thread tube size size diameter mm mm mm in 6 m14x1.5 14 .551 9 m18x1.5 ...
