Bolt, Nut, Customized Fastener manufacturer / supplier in China, offering Factory Direct A193 B7 Alloy Steel Hex Bolt High Pressure Oil Pipeline Fastener, Oilfield Heavy Duty 904L Hex Head Bolt ANSI Standard Stainless Steel Fastener, Customized M6-M100 Nickle Alloy Steel 12Cr13 Hex Nut for Oil&Gas Industry High Temperature 1-1/2 Stainless Steel 12Cr13 Hex Nut for Heavy Industry and so on.