This document belongs to the suite of European Standards EN 14399 and is designed to be read in conjunction with EN 14399 -1 for:
- general requirements
- testing for conformity evaluation
- evaluation of conformity
- regulatory marking
for assemblies of high-strength structural fit bolts and nuts of system HV suitable for preloaded joints with, thread sizes M12 to M36 and bolt property class 10.9 and EN 14399-2 for suitability testing.
This part gives requirements for:
- dimensions
- associated washer(s) according to EN 14399-6
- performance and suitability tests
for assemblies with thread sizes M12 to M36 and bolt property class 10.9.
Assemblies of hexagon fit bolts with shaft diameter (d  1 mm) and nuts according to this part of this European Standard have been designed to allow preloading of at least 0,7 fub  As ) according to EN 1993 1 8 (Eurocode 3) and to obtain ductility predominantly by deformation of the engaged thread. For this purpose the components have the following characteristics:
- nut height approximately 0,8 d
- hexagon fit bolt with short thread length.