... : black, g screwed half couplingStandard Female Threaded Steel Screwed Half Coupling screwed half couplingMaterialCarbon steel, Stainless steel, ... standard, American standard and DIN standard Kinds of screwed half coupling: bends, elbows ,tees, crosses, sockets, caps, backnuts, ... ,stainless steel ,alloy steel . Surface of screwed half coupling: cold galvanizing,hot galvanizing,and black Egdes: banded, ...