... 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) ... dacroment(4)Material:Carbon steel, stainless steel(5)Packing: Standard export packing or According to customer's requirement high quality sorts of plow ...