hengchang fasteners co.,ltd HENGCHANG FASTENERS CO.,LTD ,founded in 1966 in yichang city, is the biggest manufacturer and exporter of washers and pins ... ,the biggest national automobile group in china,took up 40% of all its selling in 2009.In 2010,their aim annual ... must be controlled at a good condition. Since 2006,instead of the ISO9001, it has certificated the ISO/TS 16949 SYSTERM ...