BS EN 14399-8:2007

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Fit bolts
5 Nuts
6 Designation of the fit bolt/nut assembly
7 Associated washers
8 Functional characteristics of the fit bolt/nut/washer(s)
  assembly
Bibliography

Provides requirements for dimensions, associated washer(s) and performance and suitability tests for assemblies with thread sizes M12 to M36 and bolt property class 10.9.

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 f_ub × A_s ¹⁾ 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.