1.Precision special nut & turned part 2.Good quality at competitive price ... mould. Such as precision metal turned parts,rivet,screw & nut,pin,shaft,terminal etc; which are widely used in ... , construction, electron, machinery, military project, metallurgy, mould, hydraulic, auto industries. They are made of iron, Stainless steel, copper, aluminium ... and the ISO Certification. precision non-standard nut