Ningbo chenghong precision component co.,ltd is an ISO 9001-2000 manufacturer and exporter for special fastener( nut, bolt, screw etc), pin shafts, plug screw connectors,  forging parts etc using all kinds of material. Our production section is equipped with cold forming machine ,Japan CNC walking-mandrel lathes and effective O.D. ranges from 2.0mm to 50.0mm in dia and the max length is 180mm.Other machinery include automatic walking-knife lathes, secondary processing facilities and precise testing equipment to ensure your quality guaranteed. We pursue to achieve zero-defect as our management concept. We sincerely welcome your inquiries and cooperation! Best Regards! willi