EN 14399-4High-strength structural bolting assemblies for preloading-system HV-hex nut
EN 14399-8High-strength structural bolting assemblies for preloading-system HV-hex nut
EN 780High-strength hexagon nuts with large widths across flats for structural steel bolting
GB/T 32076.4High-strength structural bolting saaemblies for preloading-Part 4:System HV—High strength large hexagon nuts
GOST 32484.4High-strength structural bolting assemblies for preloading-system HV-hex nut
NF E25-801-4High-strength structural bolting assemblies for preloading-system HV-hex nut
NF E25-801-8High-strength structural bolting assemblies for preloading-system HV-hex nut
PN 82171High-strength hexagon nuts with large widths across flats for structural steel bolting