... Standard Carbon Steel Screwed Half Coupling screwed half couplingMaterialCarbon steel, Stainless steel, Alloy and Malleable ironStandardANSI B1.20.1 ... many kinds of screwed half coupling, British standard, American standard and DIN standard Kinds of screwed half coupling: bends, ... ,alloy steel . Surface of screwed half coupling: cold galvanizing,hot galvanizing,and black Egdes: banded, beaded or plain ...