DS DS/EN 14399-3
DS DSEN 14399-3 2005-APR-08 Hgh-strenght structural boltng assembles for preloadng - Part 3 System HR - Hexagon bolt and nut assembles
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This standard specifies, together with EN 14399-1, the requirements for assemblies of high-strength structural bolts and nuts of system HR suitable for preloaded joints with large widths across flats, thread sizes M12 to M36 and property classes 8.8/8 and 10.9/10.