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EN 14399 consists of the following parts, under the general tile High-strength structural bolting assemblies for
preloading:
— Part 1: General requirements.
— Part 2: Suitability for preloading.
— Part 3: System HR — Hexagon bolt and nut assemblies.
— Part 4: System HV — Hexagon bolt and nut assemblies.
— Part 5: Plain washers.
— Part 6: Plain chamfered washers.
— Part 7: System HR — Countersunk head bolt and nut assemblies.
— Part 8: System HV — Hexagon fit bolt and nut assemblies.
— Part 9: System HR or HV — Direct tension indicators for bolt and nut assemblies.
— Part 10: System HRC — Bolt and nut assemblies with calibrated preload.