Hex screws: 1 Materials:aluminum, copper,steel, stainless steel etc. 2 Any sizs,any head shape with your drawing. Hex screws:1 Materials:aluminum, copper,steel, stainless steel etc.2 Any sizs,any head shape with your drawing. You can order both standard and non-standard precision machining parts in our factory. Main equipment:CNC lathe,automatic lathe,hand lathe grinder,thread rolling machine, ...