Carbon Steeel Q235 U Bolt 1.Material:Carbon Steel 2.Standard:GB,ADSI,DIN, ... JIS,SP,ISO 3.Welcom:OEM Carbon Steeel Q235 U Bolt Welcome OEMNonstandeard U bolt widely used for fastening in construction place ... .Diameter: 3-20mm4.Standard:GB,ADSI,DIN,JIS,SP,ISO, High quality Carbon Steeel Q235 U Bolt