EN ISO 898-2:2012

Mechanical properties of fasteners made of carbon steel and alloy steel - Part 2: Nuts with specified property classes - Coarse thread and fine pitch thread (ISO 898-2:2012)

This part of ISO 898 specifies mechanical and physical properties of nuts with coarse thread and 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 part of ISO 898 are evaluated at that ambient temperature range.
It is possible that they do not retain the specified mechanical and physical properties at elevated and/or lower
temperatures.
NOTE 1 Nuts conforming to the requirements of this part of ISO 898 have been used in applications
ranging from ?50 °C to +150 °C. It is the responsibility of users to 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 A320/A320M.
This part of ISO 898 is applicable to nuts:
a) made of carbon steel or alloy steel;
b) with coarse thread M5 ≤ D ≤ M39, and fine pitch thread M8×1 ≤ D ≤ M39×3;
c) with triangular ISO metric thread according to ISO 68-1;
d) with diameter/pitch combinations according to ISO 261 and ISO 262;
e) with specified property classes, including proof load;
f) with different nut styles: thin nuts, regular nuts and high nuts;
g) with minimum height m ≥ 0,45D;
h) with a minimum outside diameter or width across flats s ≥ 1,45D (see Annex A);
i) able to mate with bolts, screws and studs with property classes according to ISO 898-1.
For hot dip galvanized nuts, see ISO 10684.
This part of ISO 898 does not specify requirements for properties such as:
— prevailing torque properties (see ISO 2320);
— torque/clamp force properties (see ISO 16047 for test method);
— weldability;
— corrosion resistance.

Mechanische Eigenschaften von Verbindungselementen aus Kohlenstoffstahl und legiertem Stahl - Teil 2: Muttern mit festgelegten Festigkeitsklassen - Regelgewinde und Feingewinde (ISO 898-2:2012)

Dieser Teil von ISO 898 legt mechanische und physikalische Eigenschaften von Muttern aus Kohlenstoffstahl
und legiertem Stahl mit Regelgewinde und Feingewinde fest, die in einem Bereich der Umgebungstemperatur
von 10 °C bis 35 °C geprüft werden.
Muttern, die den Anforderungen dieses Teils von ISO 898 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 dieses Teils von ISO 898 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 A320/A320M enthalten.
Dieser Teil von ISO 898 ist anwendbar für Muttern:
a) aus Kohlenstoffstahl oder legiertem Stahl;
b) mit Regelgewinde M5 ≤ D ≤ M39 und Feingewinde M8×1 ≤ D ≤ M39×3;
c) mit metrischem ISO-Gewinde nach ISO 68-1;
d) mit Durchmesser-Steigungskombinationen nach ISO 261 und ISO 262;
e) mit festgelegten Festigkeitsklassen einschließlich Prüfkraft;
f) unterschiedlicher Muttertypen: flache Muttern, normale Muttern und hohe Muttern;
g) mit einer Mindesthöhe m ≥ 0,45D;
h) mit einem Mindestaußendurchmesser oder einer Mindestschlüsselweite s ≥ 1,45D (siehe Anhang A);
i) die zu Schrauben mit Festigkeitsklassen nach ISO 898-1 passen.
Zu feuerverzinkten Muttern siehe ISO 10684.
Dieser Teil von ISO 898 legt keine Anforderungen für Eigenschaften fest wie:
 Sicherungseigenschaften (siehe ISO 2320);
 Drehmoment/Vorspannkraft (siehe ISO 16047 für entsprechende Prüfverfahren);
 Schweißbarkeit;
 Korrosionsbeständigkeit.

Caractéristiques mécaniques des éléments de fixation en acier au carbone et en acier allié - Partie 2: Écrous de classes de qualité spécifiées - Filetages à pas gros et filetages à pas fin (ISO 898-2:2012)

La présente partie de l'ISO 898 spécifie les caractéristiques mécaniques et physiques des écrous à filetages
à pas gros et filetages à pas fin, en acier au carbone et en acier allié, lorsqu'ils sont soumis à essai dans une
plage de températures ambiantes de 10 °C à 35 °C.
Les écrous satisfaisant aux exigences de la présente partie de l'ISO 898 sont évalués dans cette plage de
températures ambiantes. Il se peut qu'ils ne conservent pas les caractéristiques mécaniques et physiques
spécifiées à des températures plus élevées et/ou plus basses.
NOTE 1 Les écrous satisfaisant aux exigences de la présente partie de l'ISO 898 ont été utilisés pour des applications
entre −50 °C et +150 °C. Il est de la responsabilité des utilisateurs de consulter un expert en matériaux de fixation pour les
températures situées hors de la plage allant de −50 °C à +150 °C et jusqu'à une température maximale de +300 °C afin de
déterminer les choix appropriés pour une application donnée.
NOTE 2 Des informations sur la sélection et l'application des aciers pour une utilisation à basses et hautes températures
sont données par exemple dans l'EN 10269, l'ASTM F2281 et l'ASTM A320/A320M.
La présente partie de l'ISO 898 s'applique aux écrous:
a) fabriqués en acier au carbone ou en acier allié;
b) à filetage à pas gros M5 ≤ D ≤ M39, et à filetage à pas fin M8×1 ≤ D ≤ M39×3;
c) à filetage métrique ISO triangulaire conforme à l'ISO 68‑1;
d) à combinaisons diamètre/pas conformes à l'ISO 261 et ISO 262;
e) de classes de qualité spécifiées, comprenant la charge d'épreuve;
f) de différents styles: écrous bas, écrous normaux et écrous hauts;
g) de hauteur minimale m ≥ 0,45D;
h) de diamètre extérieur ou de dimensions des surplats minimum s ≥ 1,45D (voir aussi Annexe A);
i) conçus pour être utilisés avec des vis, goujons et tiges filetées de classes de qualité conformes à l'ISO 898‑1.
Pour les écrous galvanisés à chaud, voir l'ISO 10684.
La présente partie de l'ISO 898 ne spécifie pas d'exigence pour les caractéristiques telles que:
— l'autofreinage (voir l'ISO 2320);
— la relation couple/tension (voir l'ISO 16047 pour la méthode d'essai);
— la soudabilité;
— la résistance à la corrosion.

Mehanske lastnosti veznih elementov, narejenih iz ogljikovega jekla in jeklene zlitine - 2. del: Matice z določenimi razredi trdnosti - Grobi in fini navoj (ISO 898-2:2012)

Ta del standarda ISO 898 določa mehanske in fizikalne lastnosti matic z grobim in finim navojem, izdelanih iz ogljikovega jekla ter jeklene zlitine, kadar se preskušajo pri temperaturi okolja od 10 °C do 35 °C. Matice, ki izpolnjujejo zahteve iz tega dela standarda ISO 898, se ovrednotijo pri tem temperaturnem razponu okolja. Možno je, da matice pri višjih in/ali nižjih temperaturah ne ohranijo določenih mehanskih in fizikalnih lastnosti.

General Information

• Status: Withdrawn
• Publication Date: 14-Mar-2012
• Withdrawal Date: 25-Oct-2022
• ICS: 21.060.20 - Nuts
• Technical Committee: CEN/TC 185 - Threaded and nonthreaded mechanical fasteners and accessories
• Drafting Committee: CEN/TC 185 - Threaded and nonthreaded mechanical fasteners and accessories
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Completion Date: 26-Oct-2022
• Directive: 2009/105/EC - DIRECTIVE 2009/105/EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 16 September 2009 relating to simple pressure vessels
• Directive: 2009/105//EC - DIRECTIVE 2009/105/EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 16 September 2009 relating to simple pressure vessels
• Directive: 2014/29/EU - Directive 2014/29/EU of The European Parliament and of the Council of 26 February 2016 on the harmonisation of the laws of the Member States relating to the making available on the market of simple pressure vessels
• Directive: 87/404/EEC - Simple pressure vessels
• Ref Project: SIST EN ISO 898-2:2012 - Mechanical properties of fasteners made of carbon steel and alloy steel - Part 2: Nuts with specified property classes - Coarse thread and fine pitch thread (ISO 898-2:2012)

Relations

• Replaces: EN ISO 898-6:1995 - Mechanical properties of fasteners - Part 6: Nuts with specified proof load values - Fine pitch thread (ISO 898-6:1994)
• Effective Date: 11-Apr-2012
• Replaces: EN 20898-2:1993 - Mechanical properties of fasteners - Part 2: Nuts with specified proof load values - Coarse thread (ISO 898-2:1992)
• Effective Date: 28-Mar-2012
• Replaced By: EN ISO 898-2:2022 - Fasteners - Mechanical properties of fasteners made of carbon steel and alloy steel - Part 2: Nuts with specified property classes (ISO 898-2:2022)
• Effective Date: 28-Aug-2019

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2012
1DGRPHãþD
SIST EN 20898-2:1996
SIST EN ISO 898-6:1996
0HKDQVNHODVWQRVWLYH]QLKHOHPHQWRYQDUHMHQLKL]RJOMLNRYHJDMHNODLQMHNOHQH
]OLWLQHGHO0DWLFH]GRORþHQLPLUD]UHGLWUGQRVWL*URELLQILQLQDYRM,62

Mechanical properties of fasteners made of carbon steel and alloy steel - Part 2: Nuts
with specified property classes - Coarse thread and fine pitch thread (ISO 898-2:2012)
Mechanische Eigenschaften von Verbindungselementen aus Kohlenstoffstahl und
legiertem Stahl - Teil 2: Muttern mit festgelegten Festigkeitsklassen - Regelgewinde und
Feingewinde (ISO 898-2:2012)
Caractéristiques mécaniques des éléments de fixation en acier au carbone et en acier
allié - Partie 2: Écrous de classes de qualité spécifiées - Filetages à pas gros et filetages
à pas fin (ISO 898-2:2012)
Ta slovenski standard je istoveten z: EN ISO 898-2:2012
ICS:
21.060.20 Matice Nuts
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 898-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2012
ICS 21.060.20 Supersedes EN 20898-2:1993, EN ISO 898-6:1995
English Version
Mechanical properties of fasteners made of carbon steel and
alloy steel - Part 2: Nuts with specified property classes - Coarse
thread and fine pitch thread (ISO 898-2:2012)
Caractéristiques mécaniques des éléments de fixation en Mechanische Eigenschaften von Verbindungselementen
acier au carbone et en acier allié - Partie 2: Écrous de aus Kohlenstoffstahl und legiertem Stahl - Teil 2: Muttern
classes de qualité spécifiées - Filetages à pas gros et mit festgelegten Festigkeitsklassen - Regelgewinde und
filetages à pas fin (ISO 898-2:2012) Feingewinde (ISO 898-2:2012)
This European Standard was approved by CEN on 14 March 2012.

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. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists 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-CENELEC 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, Turkey and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 898-2:2012: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (EN ISO 898-2:2012) 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 European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by September 2012, and conflicting national standards shall be
withdrawn at the latest by September 2012.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 20898-2:1993, EN ISO 898-6:1995.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: 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, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 898-2:2012 has been approved by CEN as a EN ISO 898-2:2012 without any modification.

INTERNATIONAL ISO
STANDARD 898-2
Third edition
2012-03-15
Mechanical properties of fasteners made
of carbon steel and alloy steel —
Part 2:
Nuts with specified property classes —
Coarse thread and fine pitch thread
Caractéristiques mécaniques des éléments de fixation en acier au
carbone et en acier allié —
Partie 2: Écrous de classes de qualité spécifiées — Filetages à pas
gros et filetages à pas fin
Reference number
ISO 898-2:2012(E)
©
ISO 2012
ISO 898-2:2012(E)
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO’s
member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.org
Published in Switzerland
ii © ISO 2012 – All rights reserved

ISO 898-2:2012(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 2
3 Symbols . 2
4 Designation systems . 2
4.1 Designation of nut styles . 2
4.2 Designation of property classes . 2
4.3 Ranges of nominal diameters in relation to nut style and property class . 3
5 Design of bolt and nut assemblies . 3
6 Materials . 4
7 Mechanical properties . 5
8 Inspection . 8
8.1 Manufacturer’s inspection . 8
8.2 Supplier’s inspection . 8
8.3 Purchaser’s inspection . 8
9 Test methods . 9
9.1 Proof load test . 9
9.2 Hardness test . 11
9.3 Surface integrity inspection .13
10 Marking .13
10.1 General .13
10.2 Identification mark of the manufacturer .13
10.3 Marking of property classes .13
10.4 Identification .14
10.5 Marking of left-hand thread .15
10.6 Marking of packages .15
Annex A (informative) Design principles of nuts .16
Annex B (informative) Thread dimensions for the test mandrel .19
Bibliography .21
ISO 898-2:2012(E)
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 898-2 was prepared by Technical Committee ISO/TC 2, Fasteners, Subcommittee SC 12, Fasteners with
metric internal thread.
This third edition cancels and replaces the second edition (ISO 898-2:1992) and ISO 898-6:1994, which have
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 property classes — Coarse thread and fine pitch thread
— Part 5: Set screws and similar threaded fasteners with specified hardness classes — Coarse thread and
fine pitch thread
1)
— Part 7: Torsional test and minimum torques for bolts and screws with nominal diameters 1 mm to 10 mm
1) It is intended that, upon revision, the main element of the title of Part 7 will be aligned with the main element of the title
of Part 1.
iv © ISO 2012 – All rights reserved

INTERNATIONAL STANDARD ISO 898-2:2012(E)
Mechanical properties of fasteners made of carbon steel and
alloy steel —
Part 2:
Nuts with specified property classes — Coarse thread and
fine pitch thread
1 Scope
This part of ISO 898 specifies mechanical and physical properties of nuts with coarse thread and 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 part of ISO 898 are evaluated at that ambient temperature range.
It is possible that they do not retain the specified mechanical and physical properties at elevated and/or lower
temperatures.
NOTE 1 Nuts conforming to the requirements of this part of ISO 898 have been used in applications
ranging from –50 °C to +150 °C. It is the responsibility of users to 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
...