... , DIN ,NPT 2.ISO CIQ SGS 3. hot galv black Good quality Cast Iron Pipe Fitting Hydraulic Quick CouplerMaterial: malleable ironFinish: galvanized ... , backnuts, crosses over, round caps etc.Cast Iron Pipe Fitting Hydraulic Quick Coupler:Product ItemMalleable iron pipe fittings: elbows, tees, sockets, bends ... joining pipe lines of team, gas, oil, air Cast Iron Pipe Fitting Hydraulic Quick Coupler Thread