high tension bolt: 1Materials:1045/5140/35Cr-Mo 2Surface: Black, ZP, HDG, ... .8,10.9,12.9 Railway fastener torshear high tension bolt 10.9 >> We manufacture ASTM E1852 & GB/T 3632 ... can be with customers' drawings and requirements.6. Payment:L/C,T/T >> Apply to railway, highway, bridge, boiler with ... so on. THE SAMPLE OF THIS KIND OF HIGH STRENGTH BOLT, GB/T 3632 Our strength on exporting:1.Our company ...