... Passivate, Oxidation, Phosphorization, Radiant PlatedStandardsJIS, ANSI, DIN, GB, ASME, BSW, ISOProcess Heading, Threading, Angle-cutting/Slotting, Heat treatment, ... Hexagon socket button head and etc.3. by type of drive insertsPhillilps, Slotted, Pillips/slotted combination, Cross recess ... .We can process standard and non-standard screws of different materials and surface treatment that are suitable ...