... ,UIC 2Surface:black 3Grade:8.8,10.9,12.9 4Material:Q235,45#,4Cr Rail fastener high strength structural steel nut bolt ... to railway, highway, bridge, boiler with steel structure, industry workshop, high civil buildings, hoisting machinery and so on.IV. We also ... .China. 2.From 2006, we have manufactured the products of high speed railway and now they are being used. We exported ...