oSIST prEN ISO 898-6:2010

Mechanical properties of fasteners made of carbon steel and alloy steel - Part 6: Nuts with specified proof load values - Fine pitch thread (ISO/DIS 898-6:2010)

2011-01-18 EMA: WI deleted following cancellation of project in ISO (see dataservice notification from 2011-01-18). According to ISO/TPM, the content of Part 6 will be merged into Part 2.

Mechanische Eigenschaften von Verbindungselementen aus Kohlenstoffstahl und legiertem Stahl - Teil 6: Muttern mit festgelegten Prüfkräften - Feingewinde (ISO/DIS 898-6:2010)

Dieser Teil von ISO 898 legt mechanische und physikalische Eigenschaften von Muttern aus Kohlenstoffstahl
und legiertem Stahl mit Feingewinde fest, die in einem Bereich der Umgebungstemperatur von 10 °C bis
35 °C geprüft werden.
Muttern, die den Anforderungen dieser Norm entsprechen, werden in diesem Bereich der Umgebungstemperatur
bewertet. Es kann sein, dass sie die festgelegten mechanischen und physikalischen Eigenschaften bei
höheren Temperaturen und/oder niedrigeren Temperaturen nicht beibehalten.
ANMERKUNG 1 Muttern, die den Anforderungen dieser Norm entsprechen, werden für Anwendungen im Bereich von
−50 °C bis +150 °C eingesetzt. Anwender sollten für Temperaturen außerhalb des Bereiches von −50 °C und +150 °C
sowie bis zu einer Höchsttemperatur von +300 °C einen erfahrenen Metallurgen für Verbindungselemente konsultieren,
um die geeignete Wahl für die vorgesehene Anwendung zu treffen.
ANMERKUNG 2 Informationen zur Auswahl und Anwendung von Stählen für den Einsatz bei niedrigeren und höheren
Temperaturen sind z. B. in EN 10269, ASTM F2281 und ASTM A 320/A 320 M enthalten.
Dieser Teil von ISO 898 gilt für Muttern:
- aus Kohlenstoffstahl oder legiertem Stahl;
- mit Feingewinde M8 × 1 ≤ D ≤ M39 × 3;
- mit metrischem ISO-Gewinde nach ISO 68-1 und ISO 262 (Feingewinde);
- mit Durchmesser-Steigungs-Kombinationen nach ISO 261 (Feingewinde);
- mit festgelegten Festigkeitsklassen einschließlich Prüfkraft;
- unterschiedlicher Muttertypen;
- mit einer Mindesthöhe m ≥ 0,45 D;
- mit einem Mindestaußendurchmesser oder einer Mindestschlüsselweite s ≥ 1,45 D;
- die zu Schrauben mit mechanischen Eigenschaften nach ISO 898-1 passen.
ANMERKUNG 3 Muttern mit Regelgewinde sind in ISO 898-2 festgelegt.
Zu feuerverzinkten Schraubenverbindungen mit nachgeschnittenen Muttern siehe außerdem ISO 10684.
Er legt keine Anforderungen für Eigenschaften fest wie:
- Sicherungseigenschaften (siehe ISO 2320);
(...)

Caractéristiques mécaniques des éléments de fixation en acier au carbone et en acier allié - Partie 6: Écrous avec charges d'épreuve spécifiées - Filetages à pas fin (ISO/DIS 898-6:2010)

Mehanske lastnosti veznih elementov, narejenih iz ogljikovega jekla in jeklene zlitine - 6. del: Matice z drobnim navojem z določeno preskusno obremenitvijo (ISO/DIS 898-6:2010)

General Information

• Status: Not Published
• Public Enquiry End Date: 31-May-2010
• ICS: 21.060.20 - Nuts
• Technical Committee: ISEL - Mechanical elements
• Current Stage: 98 - Abandoned project (Adopted Project)
• Start Date: 09-Feb-2017
• Due Date: 14-Feb-2017
• Completion Date: 09-Feb-2017
• Ref Project: prEN ISO 898-6 - Mechanical properties of fasteners made of carbon steel and alloy steel - Part 6: Nuts with specified proof load values - Fine pitch thread (ISO/DIS 898-6:2010)

Relations

• Revised: SIST EN ISO 898-6:1996 - Mechanical properties of fasteners - Part 6: Nuts with specified proof load values - Fine pitch thread (ISO 898-6:1994)
• Effective Date: 01-May-2010
• Revised: SIST EN ISO 898-6:1996 - Mechanical properties of fasteners - Part 6: Nuts with specified proof load values - Fine pitch thread (ISO 898-6:1994)
• Effective Date: 18-Jan-2023
• Revised: SIST EN ISO 898-6:1996 - Mechanical properties of fasteners - Part 6: Nuts with specified proof load values - Fine pitch thread (ISO 898-6:1994)
• Effective Date: 19-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN ISO 898-6:2010
01-maj-2010
0HKDQVNHODVWQRVWLYH]QLKHOHPHQWRYQDUHMHQLKL]RJOMLNRYHJDMHNODLQMHNOHQH
]OLWLQHGHO0DWLFH]GUREQLPQDYRMHP]GRORþHQRSUHVNXVQRREUHPHQLWYLMR
,62',6
Mechanical properties of fasteners made of carbon steel and alloy steel - Part 6: Nuts
with specified proof load values - Fine pitch thread (ISO/DIS 898-6:2010)
Mechanische Eigenschaften von Verbindungselementen aus Kohlenstoffstahl und
legiertem Stahl - Teil 6: Muttern mit festgelegten Prüfkräften - Feingewinde (ISO/DIS 898
-6:2010)
Caractéristiques mécaniques des éléments de fixation en acier au carbone et en acier
allié - Partie 6: Écrous avec charges d'épreuve spécifiées - Filetages à pas fin (ISO/DIS
898-6:2010)
Ta slovenski standard je istoveten z: prEN ISO 898-6
ICS:
21.060.20 Matice Nuts
oSIST prEN ISO 898-6:2010 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 898-6:2010

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oSIST prEN ISO 898-6:2010


EUROPEAN STANDARD
DRAFT
prEN ISO 898-6
NORME EUROPÉENNE

EUROPÄISCHE NORM

January 2010
ICS 21.060.20 Will supersede EN ISO 898-6:1995
English Version
Mechanical properties of fasteners made of carbon steel and
alloy steel - Part 6: Nuts with specified proof load values - Fine
pitch thread (ISO/DIS 898-6:2010)
Caractéristiques mécaniques des éléments de fixation en Mechanische Eigenschaften von Verbindungselementen
acier au carbone et en acier allié - Partie 6: Écrous avec aus Kohlenstoffstahl und legiertem Stahl - Teil 6: Muttern
charges d'épreuve spécifiées - Filetages à pas fin (ISO/DIS mit festgelegten Prüfkräften - Feingewinde (ISO/DIS 898-
898-6:2010) 6:2010)
This draft European Standard is submitted to CEN members for parallel enquiry. It has been drawn up by the Technical Committee
CEN/TC 185.

If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other language
made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the
same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.


EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN ISO 898-6:2010: E
worldwide for CEN national Members.

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oSIST prEN ISO 898-6:2010
prEN ISO 898-6:2010 (E)
Contents Page
Foreword .3

2

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oSIST prEN ISO 898-6:2010
prEN ISO 898-6:2010 (E)
Foreword
This document (prEN ISO 898-6:2010) has been prepared by Technical Committee ISO/TC 2 "Fasteners" in
collaboration with Technical Committee CEN/TC 185 “Fasteners” the secretariat of which is held by DIN.
This document is currently submitted to the parallel Enquiry.
This document will supersede EN ISO 898-6:1995.
Endorsement notice
The text of ISO/DIS 898-6:2010 has been approved by CEN as a prEN ISO 898-6:2010 without any
modification.

3

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oSIST prEN ISO 898-6:2010

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oSIST prEN ISO 898-6:2010
DRAFT INTERNATIONAL STANDARD ISO/DIS 898-6
ISO/TC 2/SC 1 Secretariat: DIN
Voting begins on: Voting terminates on:
2010-01-14 2010-06-14
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION • МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ • ORGANISATION INTERNATIONALE DE NORMALISATION
Mechanical properties of fasteners made of carbon steel and
alloy steel —
Part 6:
Nuts with specified proof load values — Fine pitch thread
Caractéristiques mécaniques des éléments de fixation en acier au carbone et en acier allié —
Partie 6: Écrous avec charges d'épreuve spécifiées — Filetages à pas fin
[Revision of second edition (ISO 898-6:1994)]
ICS 21.060.20

ISO/CEN PARALLEL PROCESSING
This draft has been developed within the International Organization for Standardization (ISO), and
processed under the ISO-lead mode of collaboration as defined in the Vienna Agreement.
This draft is hereby submitted to the ISO member bodies and to the CEN member bodies for a parallel
five-month enquiry.
Should this draft be accepted, a final draft, established on the basis of comments received, will be
submitted to a parallel two-month approval vote in ISO and formal vote in CEN.
To expedite distribution, this document is circulated as received from the committee secretariat.
ISO Central Secretariat work of editing and text composition will be undertaken at publication
stage.
Pour accélérer la distribution, le présent document est distribué tel qu'il est parvenu du
secrétariat du comité. Le travail de rédaction et de composition de texte sera effectué au
Secrétariat central de l'ISO au stade de publication.
THIS DOCUMENT IS A DRAFT CIRCULATED FOR COMMENT AND APPROVAL. IT IS THEREFORE SUBJECT TO CHANGE AND MAY NOT BE
REFERRED TO AS AN INTERNATIONAL STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS BEING ACCEPTABLE FOR INDUSTRIAL, TECHNOLOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT, WITH THEIR COMMENTS, NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPORTING DOCUMENTATION.
©
International Organization for Standardization, 2010

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oSIST prEN ISO 898-6:2010
ISO/DIS 898-6
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Violators may be prosecuted.
©
ii ISO 2010 – All rights reserved

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oSIST prEN ISO 898-6:2010
ISO/DIS 898-6
Contents Page
Foreword .v
1 Scope.1
2 Normative references.2
3 Symbols.2
4 Designation systems.3
4.1 Designation for nut styles .3
4.2 Designation for property classes .3
4.2.1 General.3
4.2.2 Regular nuts (style 1) and high nuts (style 2).3
4.2.3 Thin nuts (style 0).3
4.3 Range of nominal diameters in relation to nut style and property class .3
5 Design of bolt/nut assemblies .4
5.1 General.4
5.2 Bolt/nut combinations.4
6 Materials.4
7 Mechanical properties.5
8 Control.7
8.1 Manufacturer's control.7
8.2 Supplier's control.7
8.3 Purchaser's control.7
9 Test methods.7
9.1 Proof load test .7
9.1.1 General.7
9.1.2 Applicability.8
9.1.3 Apparatus.8
9.1.4 Testing device.8
9.1.5 Test procedure.9
9.1.6 Test results.10
9.1.7 Requirements.10
9.2 Hardness test.10
9.2.1 Applicability.10
9.2.2 Test methods.10
9.2.3 Test procedures.10
9.2.4 Requirements.11
9.3 Surface integrity test.11
10 Marking.11
10.1 General.11
10.2 Identification mark of the manufacturer.11
10.3 Marking of property classes.12
10.3.1 General.12
10.3.2 Regular nuts (style 1) and high nuts (style 2).12
10.3.3 Thin nuts (style 0).12
10.4 Identification.13
10.4.1 Hexagon nuts.13
10.4.2 Other type of nuts.13
10.5 Marking of left-hand thread .13
10.6 Marking of packages .14
© ISO 2009 – All rights reserved iii

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oSIST prEN ISO 898-6:2010
ISO/DIS 898-6
Annex A (informative) Design principles of nuts .15
A.1 Basic design principles of nuts.15
A.2 Nuts with thread tolerance wider than 6H.16
A.3 Thin nuts.16
Bibliography .17

Figures
Figure 1 — Axial tensile test . 8
Figure 2 — Axial compressive test . 9
Figure 3 — Examples of marking with designation symbol. 13
Figure 4 — Examples of marking with clock-face system (alternative marking) . 13
Figure 5 — Marking of left-hand thread. 13
Figure 6 — Alternative marking of left-hand thread. 14

Tables
Table 1 — Range of nominal diameters in relation to nut style and property class . 3
Table 2 — Combination of regular nuts (style 1) and high nuts (style 2) with bolt property classes. 4
Table 3 — Combination of thin nuts (style 0) with bolt property classes. 4
Table 4 — Steels . 5
Table 5 — Proof load values for nuts . 6
Table 6 — Hardness properties for nuts. 7
Table 7 — Hole diameter for the grip. 9
Table 8 — Marking symbols of property classes for regular nuts (style 1) and high nuts (style 2). 12
Table 9 — Clock face system for marking property classes for regular nuts (style 1) and high nuts (style 2). 12
Table 10 — Marking symbols of property classes for thin nuts (style 0) . 12
Table A.1 — Reduction in thread strength. 16
Table A.2 — Minimum stripping strength of nuts as a percentage of the proof load of bolts. 16

iv © ISO 2009 – All rights reserved

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oSIST prEN ISO 898-6:2010
ISO/DIS 898-6
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 898-6 was prepared by Technical Committee ISO/TC 2, Fasteners, Subcommittee SC 1, Mechanical
properties of fasteners.
This third edition cancels and replaces the second edition (ISO 898-6:1994), which has been technically
revised.
ISO 898 consists of the following parts, under the general title Mechanical properties of fasteners made of
carbon steel and alloy steel:
⎯ Part 1: Bolts, screws and studs with specified property classes — Coarse thread and fine pitch thread
⎯ Part 2: Nuts with specified proof load values — Coarse thread
⎯ Part 5: Set screws and similar threaded fasteners not under tensile stresses
⎯ Part 6: Nuts with specified proof load values — Fine pitch thread
⎯ Part 7: Torsional test and minimum torques for bolts and screws with nominal diameters 1 mm to 10 mm
© ISO 2009 – All rights reserved v

DRAFT 2010

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oSIST prEN ISO 898-6:2010

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oSIST prEN ISO 898-6:2010
DRAFT INTERNATIONAL STANDARD ISO/DIS 898-6

Mechanical properties of fasteners made of carbon steel and
alloy steel —
Part 6:
Nuts with specified proof load values — Fine pitch thread
1 Scope
This part of ISO 898 specifies mechanical and physical properties of nuts with fine pitch thread made of
carbon steel and alloy steel when tested at an ambient temperature range of 10 °C to 35 °C.
Nuts conforming to the requirements of this standard are evaluated at that ambient temperature range. They
may not retain the specified mechanical and physical properties at elevated and/or lower temperatures.
NOTE 1 Nuts conforming to the requirements of this standard have been used in applications ranging from – 50 °C to
+ 150 °C. Users should consult an experienced fastener materials expert for temperatures outside the range of – 50 °C to
+ 150 °C and up to a maximum temperature of +300°C to determine appropriate choices for a given application.
NOTE 2 Information for the selection and application of steels for use at lower and elevated temperatures is given for
instance in EN 10269, ASTM F2281 and in ASTM A 320/A 320 M.
This part of ISO 898 applies to nuts:
⎯ made of carbon steel or alloy steel;
⎯ with fine pitch thread M8×1 ≤ D ≤ M39×3;
⎯ with triangular ISO metric thread according to ISO 68-1 and ISO 262 (fine pitch thread);
⎯ with diameter/pitch combinations according to ISO 261 (fine pitch thread);
⎯ with specified property classes, including proof load;
⎯ with different nut styles;
⎯ with minimum height m ≥ 0,45 D;
⎯ with a minimum outside diameter or width across flats s ≥ 1,45 D;
⎯ able to mate with bolts, screws and studs with mechanical properties according to ISO 898-1.
NOTE 3 Nuts with coarse thread are defined in ISO 898-2.
For hot dip galvanized assemblies with overtapped nuts, see ISO 10684 in addition.
It does not specify requirements for such properties as
⎯ prevailing torque properties (see ISO 2320);
⎯ torque/clamp force properties (see ISO 16047 for test method);
⎯ weldability;
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oSIST prEN ISO 898-6:2010
ISO/DIS 898-6
⎯ corrosion resistance.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 68-1, ISO general purpose screw threads — Basic profile — Part 1: Metric screw threads
ISO 261, ISO general purpose metric screw threads — General plan
ISO 262, ISO general purpose metric screw threads — Selected sizes for screws, bolts and nuts
ISO 286-2, ISO system of limits and fits — Part 2: Tables of standard tolerance grades and limit deviations for
holes and shafts
ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel — Part 1: Bolts, screws
and studs with specified property classes — Coarse thread and fine pitch thread
ISO 2320, Prevailing torque type steel nuts — Mechanical and performance properties
ISO 6157-2, Fasteners — Surface discontinuities — Part 2: Nuts
ISO 6506-1, Metallic materials — Brinell hardness test — Part 1: Test method
ISO 6507-1, Metallic materials — Hardness test — Vickers test — Part 1: Test method
ISO 6508-1, Metallic materials — Rockwell hardness test — Part 1: Test method (scales A, B, C, D, E, F, G,
H, K, N, T)
ISO 6892, Metallic materials — Tensile testing at ambient temperature
ISO 7500-1, Metallic materials — Verification of static uniaxial testing machines — Part 1:
Torsion/compression testing machines; Verification and calibration of the force-measuring system
ISO 10684:2004, Fasteners — Hot dip galvanized coatings
ISO 16047, Fasteners — Torque/clamp force testing
ISO 16426, Fasteners — Quality assurance system
3 Symbols
The following symbols are applied in this standard.
D  nominal thread diameter of the nut, in mm
d  hole diameter of the grip, in mm
h
F load, in N
h  thickness of the grip, in mm
m height of the nut, in mm
P  thread pitch, in mm
s width across flats, in mm
2 © ISO 2009 – All rights reserved

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oSIST prEN ISO 898-6:2010
ISO/DIS 898-6
4 Designation systems
4.1 Designation for nut styles
This standard specifies requirements for three styles of nuts according to their height:
⎯ style 2: high nut with minimum height m ≥ 0,9 D
⎯ style 1: regular nut with minimum height m ≥ 0,8 D
⎯ style 0: thin nut with minimum height 0,45 D ≤ m < 0,8 D.
4.2 Designation for property classes
4.2.1 General
Marking and labelling of nuts with property classes is specified in Clause 10 only for nuts which meet all
requirements of this part of ISO 898.
4.2.2 Regular nuts (style 1) and high nuts (style 2)
The symbol for property classes of regular nuts (style 1) and high nuts (style 2) consists of one number. It
corresponds to the number to the left of the maximum appropriate property class of bolts, screws and studs
with which they can be mated.
4.2.3 Thin nuts (style 0)
The symbol for property classes of thin nuts (style 0) consists of two numbers:
— the first number is zero, indicating that the loadability of the nut is reduced in comparison with the
loadability of a regular nut or a high nut according to 4.2.2 and therefore thread stripping may occur when
overloaded;
— the second number corresponds to 1/100 of the nominal stress under proof load on a hardened test
mandrel, in MPa.
4.3 Range of nominal diameters in relation to nut style and property class
See Table 1.
Table 1 — Range of nominal diameters in relation to nut style and property class
Range of nominal diameters D
Property class
Regular nut (style 1) High nut (style 2) Thin nut (style 0)
04 — — M8 ≤ D ≤ M39
05 — —
M8 ≤ D ≤ M39
5 M8 ≤ D ≤ M39 — —
6 M8 ≤ D ≤ M39 — —
8
M8 ≤ D ≤ M39 M8 ≤ D ≤ M16 —
10 —
M8 ≤ D ≤ M16 M8 ≤ D ≤ M39
12 — M8 ≤ D ≤ M16 —
© ISO 2009 – All rights reserved 3

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oSIST prEN ISO 898-6:2010
ISO/DIS 898-6
5 Design of bolt/nut assemblies
5.1 General
Explanations on the basic design principles of nuts and the loadability of bolted assemblies are given in
Annex A.
5.2 Bolt/nut combinations
Regular nuts (style 1) and high nuts (style 2) shall be mated to externally threaded fasteners according to
Table 2. However, nuts of a higher property class can replace nuts of a lower property class.
Table 2 — Combination of regular nuts (style 1) and high nuts (style 2) with bolt property classes
Property class of bolt, screw and stud Minimum property class for the mating nut
4.6  4.8  5.6  5.8 5
6.8 6
8.8 8
10.9 10
12.9 12

Thin nuts (style 0) have a reduced loadability compared to regular nuts or high nuts, and are not designed to
provide resistance to stripping.
Thin nut (style 0) shall be mated to externally threaded fasteners according to Table 3. However, nuts of
property class 05 can replace nuts of property class 04.
NOTE Thin nuts used as jam nuts should be assembled together with a regular nut or a high nut, see Annex A.
Table 3 — Combination of thin nuts (style 0) with bolt property classes
Property class of bolt, screw and stud Minimum property class for the mating thin nut
4.6  4.8  5.6  5.8  6.8  8.8  9.8 04
10.9 05

6 Materials
Table 4 specifies materials and heat treatment for the different property classes of nuts.
Nuts of property classes 05, 8 (regular nuts (style 1) with D > M16), 10 and 12 shall be quenched and
tempered.
The chemical composition shall be assessed in accordance with the relevant ISO standards.
4 © ISO 2009 – All rights reserved

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oSIST prEN ISO 898-6:2010
ISO/DIS
...