... coating as customer's reque Carbon Steel Sockets Couplingsteel socket material : Seamless Steel , stainless steel , carbon steelsteel socket standard according ... to ANSI/ASTM A 865 and EN10241. steel Sockets thread refers internal paralled threadsteel socket Size ... : ANSI/ASME,DIN,ISO,JIS ,GB,AND EN etc.,steel socket Application:Petroleum, chemical, power, gas, metallurgy, shipbuilding ...