... .Standard:GB,ADSI,DIN,JIS,SP,ISO 3.Welcom:OEM Carbon Steel 22H U Bolt Welcome OEMNonstandeard U bolt widely used ... other places.1.Material:Stainless steel,carbon steel,Brass, Alloy,etc.2.Surface:Galvanied,Dacromet Zinc,HDG,Mechanical plating,etc.3.Diameter ... : 3-20mm4.Standard:GB,ADSI,DIN,JIS,SP,ISO, Carbon Steel 22H ...