SN EN 20898-2 : 1995
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
MECHANICAL PROPERTIES OF FASTENERS - PART 2: NUTS WITH SPECIFIED PROOF LOAD VALUES; COARSE THREAD
01-06-2012
12-01-2013
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
8. Test methods
9. Marking
Annex
Loadability of bolted connections
Tables
1. Designation system for nuts with nominal heights
>/= 0,8 D
2. Designation system and proof stresses for nuts with
nominal heights >/= 0,5 D < 0,8 D
3. Limits of chemical composition
4. Mechanical properties (coarse thread)
5. Proof load values - Coarse thread
6. Minimum bolt stress when stripping occurs
7. Marking symbols for nuts with property classes
according to 3.1
8. Marking for nuts with property classes according to
3.2
9. Property classes for bolts and screws
10. Heights of hexagon nuts
11. Nut designs and property classes
12. Mechanical properties (coarse thread)
13. Influence of the thread tolerance upon the test load
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)
National annex NB (informative)
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