... NPT threads 5.Standard,Heavy series Elbow 90 degree 3/8 inch, NPT, Galvanized Malleable Iron Shijiazhuang Jizhong Malleable iron Co., ... the thread are of British standard, American standard & DIN with accurate geometrical dimensions, widely used in connecting various pipelines ... GOOD FAITH CAST BRAND and established friendly business relationship with many foreign trade companies. We have won a good ...