... DIN Thread Standard 3 Black,Galvanized 4 ISO,SGS,CIQ Cast Iron Pipe Fitting Hydraulic Quick water Coupler size: 1/8'-6' ... unions, crosses, flanges, plugs, backnuts, crosses over, round caps etc. Cast Iron Pipe Fitting Hydraulic Quick Coupler, size: 1/8'-6' Product ItemMalleable ... B16.39 / B1.20.1 We can also produce malleable iron pipe fittings according to the drawing samples from customers. Welcome ...