NBN EN ISO 898-6 : 1997

Committees responsible
National foreword
Foreword
Specification
1 Scope
2 Normative references
3 Designation system
4 Materials
5 Mechanical properties
6 Proof load values
7 Failure loads for nuts with nominal heights of
     > 0.5d and < 0.8d
8 Test methods
9 Marking
Annex
ZA (normative) Normative references to international
     publications with their relevant European
     publications
Tables
1 Reduction in thread strength
2 Designation system for nuts with nominal heights
     > 0.8d
3 Designation system and stresses under proof load
     for nuts with nominal heights > 0.5d and < 0.8d
4 Limits of chemical composition
5 Mechanical properties
6 Proof load values
7 Minimum stripping strength of nuts as a percentage
     of the proof load of bolts
8 Marking for nuts with property classes in accordance
     with 3.1
9 Marking for nuts with property classes in accordance
     with 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

Specifies the mechanical properties of nuts with specified proof load values when tested at a +10 degrees C to +35 degrees C ambient temperature range. Does not apply to nuts requiring special properties.