... kinds of precision hardware part,plastic & mould. Such as precision metal turned parts,rivet,screw & nut,pin,shaft,terminal etc; which are ... communication, aerospace, construction, electron, machinery, military project, metallurgy, mould, hydraulic, auto industries. They are made of iron, Stainless steel, copper, aluminium ... steel and meet the ROHS and the ISO Certification precision non-standard screw