... type high tensile bolts and nuts washers for steel structures 10.9 >> We manufacture ASTM E1852 & GB/T 3632 series standard ... are being used. We exported to world markets, such as U.S.A., Canada, Cuba, Germany, Japan, Singapore, Malaysia and Africa ... viewTesting equipmentsWorkshop Welcome your visit! ASTM E1852 for steel structures 10.9 high tensile bolts and nuts