... g screwed half coupling Black BS1387 Standard Carbon Steel Screwed Half Coupling screwed half couplingMaterialCarbon steel, Stainless steel, Alloy and ... American standard and DIN standard Kinds of screwed half coupling: bends, elbows ,tees, crosses, sockets, caps, ... connection etc. Materials: carbon steel ,stainless steel ,alloy steel . Surface of screwed half coupling: cold galvanizing,hot galvanizing ...