... high tensile bolts and nuts: 1Used for steel structures 2We can produce by customer ... Tortous type high tensile bolts and nuts washers for steel structures 10.9 >> We manufacture ASTM E1852 ... Apply to railway, highway, bridge, boiler with steel structure,industry workshop,high civil buildings, hoisting machinery and ... Welcome your visit! ASTM E1852 for steel structures 10.9 high tensile bolts and nuts