... DIN Thread Standard 3 Black,Galvanized 4 ISO,SGS,CIQ Cast Iron Pipe Fitting Hydraulic Quick water Coupler size: 1/8 ... , nipples, unions, crosses, flanges, plugs, backnuts, crosses over, round caps etc. Cast Iron Pipe Fitting Hydraulic Quick Coupler, size: 1/8'-6 ... ' Product ItemMalleable iron pipe fittings: elbows, tees, sockets, bends, ...