... manufacturer2. NANTE has two main manufacture bases, 5 main factories with 12 product lines of machining, welding, heat treatment, assembly, painting ... , casting ect.,3. bolts and nuts(1)Grade: 4.8 -- 12.9,A2, A4(2 ... )Packing: Standard export packing or According to customer's requirement high quality sorts of plow bolts and hex nuts