... 10 years supplier 3.ISO,SGS certification 4.Canon Machine Bolt A: SpecificationMaterial:stainless steel, aluminum,carbon steelSurface ... or service pls let us know without any hesitationContactAmy fax:86-769-86734870 Material1.Stainless Steel: SS201, SS303, ... DIN,JIS,ANSI,BSWManufacture ProcessHeading/washer assembly/Threading/Secondary machine/heat treatment/plating/Anti-slipping/Baking/QA/Package/ ...