NF EN 20898-6 : 1992

Cooperating organizations
National foreword
Foreword
1. Scope and field of application
2. References
3. Designation system
4. Materials
5. Mechanical properties
6. Proof load values
7. Failure loads for nuts with nominal height of 0,5 D
     and < 0,8 D
8. Test methods
9. Marking
Tables
1. Designation system for nuts with nominal heights
     >/= 0,8 D
2. Designation system and stresses under proof load for
     nuts with nominal heights >/= 0,5 D < 0,8 D
3. Limits of chemical composition
4. Mechanical properties
5. Proof load values
6. Minimum stripping strength of nuts in % of the
     proofing load of bolts
7. Marking symbols for nuts with property classes
     according to 3.1
8. Marking for nuts with property classes according to
     3.2
Figures
1. Axial tensile test
2. Axial compressive test
3. Examples of marking with designation symbol
4. Examples of marking with code symbol (clock-face
     system)
5. Left-hand thread marking
6. Alternative left-hand thread marking
National annex NA (informative) Committees responsible
National annex NB (informative) Cross-references

Specifies the mechanical properties of nuts with specified proof load values. Coverage includes designation system, materials, proof load values and marking. Also includes tables and diagrams.