1. EN 14399-4:2015-04 High-strength structural bolting assemblies for preloading – Part 4: System HV – Hexagon bolt and nut assemblies.
2. EN 14399-3:2015-04 High-strength structural bolting assemblies for preloading – Part 3: System HR – Hexagon bolt and nut assemblies.
3. EN 14399-9:2019-06 High-strength structural bolting assemblies for preloading – Part 9: System HR or HV – Direct tension indicators for bolt and nut assemblies.
4. EN 14399-10:2019-06 High-strength structural bolting assemblies for preloading – Part 10: System HRC – Bolt and nut assemblies with calibrated preload.
5. abZ Z-14.4-584 HV-Verbindungen in Stahlkonstruktionen mit TCB Standard und TCB Studs. Allgemeine bauaufsichtliche Zulassung des Deutschen Instituts für Bautechnik. Zulassungsbescheid vom 20.02.2012.