... machine part 1.machine screw size,M3-M36 2.carbon, stainless steel 3.zinc plated,black,etc 4.flat,pan, etc. cnc machining part ... 1.Surface Finish: annealing, natural anodization, heat treatment, polishing, nickel plating, chrome plating, yellow passivation, gold passivation, galvanizing, satin, etc.2 ... customer1)Details: Product name cnc machining part Material1.Stainless Steel: SS201, SS303, ...