CE認證：螺栓螺母EN142992015-01-06
EN14399-4:2005 預載荷高強度結構螺栓連接副-第4部分:HV系統-連接副的螺栓和螺母。
EN14399-4:2005 High-strength structural bolting assemblies for preloading-Part 4: System HV-Hexagon bolt and nut assemblies.
EN14399-4:2005 High-strength structural bolting assemblies for preloading-Part 4: System HV-Hexagon bolt and nut assemblies.
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