... 270 3Surface:Black,Zinc,Dacro 4Certificate:ISO9 Different types of grade 8.8 bolt specification Details of the product:1Materials: 1045, 45#, ... (Suzhou Sudelan Railway Parts Co., Ltd.) is specializing in producing railway fasteners. We have certified by ISO9001:2008 ... A., Canada, Cuba, Germany, Japan, Singapore, Malaysia and Africa and so on.Pictures:1.certificate:2. Various honorary certificates:3 ...