High strength bolting assemblies for preloading EN 14399-3 5 – M12X30 EN14399-3 GR8.8 HDG 425 – M16X45 EN14399-3 GR8.8 HDG 327 – M20X50 EN14399-3 GR8.8 HDG 88 – M20X60 EN14399-3 GR8.8 HDG 176 – M24X90 EN14399-3 GR8.8 HDG 53 – M30X90 EN14399-3 GR8.8 HDG 70 – M36X95 EN14399-3 GR8.8 HDG