Profile: Taicang Zhongbo Railway Fastening Co., Ltd. offers railway fastenings, fixings and railway materials. We are an ISO 9001:2000 certified company. Our double coil spring washers are coated with oxide black, zinc yellow and zinc white. Our washers are packed in wooden pallets. We also provide spear and curved bolts, which are used in tunnel construction. The length of our bolt is 300-600 mm. Our nylon dowels are made of glass reinforced nylon, nylon and high density polyethylene. We produce steel coach screws for wooden sleepers. Our steel crane rail clips are formed by hot forging process with oxide black or zinc.