... 9001:2008 4.Surface: black, g mild steel couplingsBS DIN ANSI Standard Carbon Steel Mild Steel Couplings screwed half couplingMaterialCarbon ... , BS, NPT, Metric, BSPT, BSP, NPS (ISO7/1, DIN 2999, ANSI B1.20.1)DimensionBS EN10241, ASTM A733, DIN2982TypeFull ... kinds of mild steel couplings, British standard, American standard and DIN standard Kinds of mild steel couplings : bends, elbows ,tees ...