Screw: 1 Materials:aluminum, copper,steel, stainless steel etc. 2 Any sizs,any head shape,or special parts with your drawing. Screw:1 You can order both standard and non-standard precision machining parts in our factory.2 Main equipment:CNC lathe,automatic lathe,hand lathe grinder,thread rolling machine,tapping drilling machine and etc.3 Surface treatment according to customer's requirements can ...