UNI EN 14399-9 : 2009

Foreword
Introduction
1 Scope
2 Normative references
3 Direct tension indicators
  3.1 Dimensions
  3.2 Specifications and reference standards
  3.3 Performance test of direct tension indicators
  3.4 Test method for measuring compression loads (all
      finishes) on direct tension indicators
      3.4.1 General
      3.4.2 Testing apparatus
      3.4.3 Compression loading system
      3.4.4 Support blocks
      3.4.5 Bearing blocks
      3.4.6 Calibration
      3.4.7 Test Procedure
  3.5 Marking of the direct tension indicator
  3.6 Designation of the direct tension indicator
4 Nut face washers and bolt face washers
  4.1 Dimensions
  4.2 Specifications and reference standards for nut face
      washers and bolt face washers
  4.3 Marking
      4.3.1 Nut face washers
      4.3.2 Bolt face washers
  4.4 Designation
      4.4.1 Nut face washers
      4.4.2 Bolt face washers
5 Functional characteristics
  5.1 Assemblies
  5.2 Functional characteristics of direct tension indicators
      in the assembly
  5.3 Functional characteristics of the bolt/nut/washer(s)/
      direct tension indicator assembly
      5.3.1 General
      5.3.2 Test procedure
Annex A (informative) Special testing conditions and procedures
Bibliography

Describes, together with EN 14399-1, the requirements for assemblies of high-strength structural bolts and nuts, with large width across flats, of system HR or HV, including the requirements for the general dimensions, tolerances, materials and performance for two grades, H8 and H10, of compressible washer-type direct tension indicators, nut face washers and bolt face washers suitable for preloaded joints.