... *270 3Surface:Black,Zinc,Dacro 4Certificate:ISO9 Different types of grade 8.8 bolt specification Details of the product:1Materials: 1045, 45#, 40Cr ... s drawings.9 Certificate:ISO9001:2008,SGSOur strength on exporting:1.Our company (Suzhou Sudelan Railway Parts Co., Ltd.) ... , Japan, Singapore, Malaysia and Africa and so on.Pictures:1.certificate:2. Various honorary certificates:3.products:Zinc, Black, ...