... years supplier 3.ISO,SGS certification 4.Canon Machine Bolt A: SpecificationMaterial:stainless steel, aluminum,carbon steelSurface Finish ... etc7,.Carbon steel:C1006,C1010,C1018,C1022,C1035K,C10458, Alloy steel: SCM435,C10B21,C10B33Specification& gaugeM4-M33Surface FinishingZn- Plated, ... wishes from clients. We are not only offering good bolt products but also offering chipboard Screw, machine Screw , ...