EN ISO 2320:2015
(Main)Fasteners - Prevailing torque steel nuts - Functional properties (ISO 2320:2015)
Fasteners - Prevailing torque steel nuts - Functional properties (ISO 2320:2015)
ISO 2320:2015 specifies the functional properties for prevailing torque steel nuts when tested at an ambient temperature range of +10 °C to +35 °C. It includes a combined test method to determine the prevailing torque properties and the torque/clamp force properties at the same time.
It applies to prevailing torque all metal type nuts and prevailing torque non-metallic insert type nuts:
- with triangular ISO thread in accordance with ISO 68‑1;
- with diameter/pitch combination in accordance with ISO 261 and ISO 262;
- with coarse pitch thread M5 to M39 or with fine pitch thread M8 × 1 to M39 × 3;
- with thread tolerances in accordance with ISO 965-2;
- with mechanical properties in accordance with ISO 898‑2;
Prevailing torque values specified in this standard are based on laboratory test conditions.
NOTE 1 Actual prevailing torques in practical application can vary.
NOTE 2 All metal type nuts conforming to the requirements of this International Standard are used in applications ranging from −50 °C to +150 °C.
NOTE 3 Non-metallic insert type nuts conforming to the requirements of this International Standard are used in applications ranging from −50 °C to +120 °C.
WARNING ? Temperatures outside the ambient temperature range can influence the functional properties (torque/clamp force and prevailing torque properties), see Annex A.
Mechanische Verbindungselemente - Muttern aus Stahl mit Klemmteil - Funktionelle Eigenschaften (ISO 2320:2015)
Diese Internationale Norm legt funktionelle Eigenschaften für Muttern mit Klemmteil fest, wenn sie in einem Umgebungstemperaturbereich von +10 °C bis +35 °C geprüft werden. Sie enthält ein kombiniertes Prüfver¬fahren zur gleichzeitigen Bestimmung der Klemmdrehmomenteigenschaften und der Drehmoment/Vor¬spannkraft-Eigenschaften.
Sie gilt für Ganzmetallmuttern mit Klemmteil und für Muttern mit Klemmteil mit nichtmetallischem Einsatz
mit ISO-Gewindeprofil nach ISO 68 1;
mit Durchmesser/Steigungs-Kombination nach ISO 261 und ISO 262;
mit Regelgewinde M5 bis M39 oder mit Feingewinde M8×1 bis M39×3;
mit den Gewindetoleranzen nach ISO 965 2;
mit den mechanischen Eigenschaften nach ISO 898 2.
Die in dieser Norm festgelegten Klemmdrehmomentwerte basieren auf Laborprüfbedingungen.
ANMERKUNG 1 Die tatsächlichen Klemmdrehmomente können in der praktischen Anwendung abweichen.
ANMERKUNG 2 Ganzmetallmuttern, die die Anforderungen dieser Internationalen Norm erfüllen, werden in Anwen¬dungen in einem Temperaturbereich von −50 °C bis +150 °C verwendet.
ANMERKUNG 3 Muttern mit nichtmetallischem Einsatz, die die Anforderungen dieser Internationalen Norm erfüllen, werden in Anwendungen in einem Temperaturbereich von −50 °C bis +120 °C verwendet.
WARNUNG — Temperaturen außerhalb des Umgebungstemperaturbereichs können die funktionellen Eigenschaften (Drehmoment/Vorspannkraft- und Klemmdrehmomenteigenschaften) beeinflussen, siehe Anhang A.
Fixations - Écrous autofreinés en acier - Caractéristiques fonctionnelles (ISO 2320:2015)
ISO 2320:2015 spécifie les caractéristiques fonctionnelles des écrous autofreinés en acier, essayés dans une plage de températures ambiantes de + 10 °C à + 35 °C. Elle comprend un essai unique destiné à déterminer simultanément les caractéristiques d'autofreinage et les caractéristiques couple/tension.
Elle s'applique aux écrous autofreinés tout métal et aux écrous autofreinés à anneau non métallique:
- à filetage ISO triangulaire conforme à l'ISO 68-1;
- de combinaison diamètre/pas conforme à l'ISO 261 et l'ISO 262;
- de diamètres M5 à M39 pour les filetages à pas gros, ou M8x1 à M39x3 pour les filetages à pas fin;
- ayant des tolérances sur filetage conformes à l'ISO 965-2;
- de caractéristiques mécaniques conformes à l'ISO 898-2.
Les valeurs de couples d'autofreinage spécifiées dans la présente Norme internationale sont basées sur des conditions d'essai de laboratoire.
NOTE 1 Les couples d'autofreinage en conditions réelles d'assemblage peuvent en différer.
NOTE 2 Les écrous autofreinés tout métal conformes aux exigences de la présente Norme internationale sont utilisés pour des applications de ? 50 °C à + 150 °C.
NOTE 3 Les écrous autofreinés à anneau non métallique conformes aux exigences de la présente Norme internationale sont utilisés pour des applications de ? 50 °C à + 120 °C.
AVERTISSEMENT ? Des températures en dehors de la plage de température ambiante peuvent influencer les caractéristiques fonctionnelles (caractéristiques couple/tension et caractéristiques d'autofreinage), voir Annexe A.
Vezni elementi - Jeklene samovarovalne matice - Mehanske in funkcionalne lastnosti (ISO 2320:2015)
Ta mednarodni standard določa funkcijske lastnosti za jeklene samovarovalne matice, preskušane pri temperaturi okolja od +10 °C do +35 °C. Vključuje kombinirano preskusno metodo za določitev lastnosti pritrditve hkrati z lastnostmi navorne/spojne sile. Uporablja se za kovinske samovarovalne matice in samovarovalne matice z nekovinskim vložkom:
– s trikotnim navojem ISO v skladu s standardom ISO 68-1;
– s kombinacijo premera in navoja v skladu s standardoma ISO 261 in ISO 262;
– z grobim navojem M5 do M39 in drobnim navojem M8×1 do M39×3;
– s tolerancami navojev v skladu s standardom ISO 965-2;
– z mehanskimi lastnostmi v skladu s standardom ISO 898-2;
Vrednosti pritrditve, podane v tem standardu, temeljijo na laboratorijskih preskusnih pogojih.
OPOMBA 1: Dejanske vrednosti pritrditve v praksi se lahko razlikujejo.
OPOMBA 2: Kovinske matice, ki izpolnjujejo zahteve tega mednarodnega standarda, se uporabljajo v izvedbah od −50 °C do +150 °C.
OPOMBA 3: Matice z nekovinskim vložkom, ki izpolnjujejo zahteve tega mednarodnega standarda, se uporabljajo v izvedbah od −50 °C do +120 °C.
OPOZORILO: Temperature zunaj navedenega razpona temperature okolja lahko vplivajo na funkcionalne lastnosti (lastnosti navorne/spojne sile in lastnosti pritrditve), glej dodatek A.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-marec-2016
1DGRPHãþD
SIST EN ISO 2320:2009
Vezni elementi - Jeklene samovarovalne matice - Mehanske in funkcionalne
lastnosti (ISO 2320:2015)
Fasteners - Prevailing torque type steel nuts - Mechanical and performance properties
(ISO 2320:2015)
Mechanische Verbindungselemente - Muttern aus Stahl mit Klemmteil - Mechanische
und funktionelle Eigenschaften (ISO 2320:2015)
Fixations - Écrous autofreinés en acier - Caractéristiques mécaniques et performances
(ISO 2320:2015)
Ta slovenski standard je istoveten z: EN ISO 2320:2015
ICS:
21.060.20 Matice Nuts
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 2320
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2015
EUROPÄISCHE NORM
ICS 21.060.20 Supersedes EN ISO 2320:2008
English Version
Fasteners - Prevailing torque steel nuts - Functional
properties (ISO 2320:2015)
Fixations - Écrous autofreinés en acier - Mechanische Verbindungselemente - Muttern aus Stahl
Caractéristiques fonctionnelles (ISO 2320:2015) mit Klemmteil - Mechanische und funktionelle
Eigenschaften (ISO 2320:2015)
This European Standard was approved by CEN on 17 October 2015.
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, Former Yugoslav Republic of Macedonia, 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
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 2320:2015 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 2320:2015) 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 June 2016, and conflicting national standards shall be
withdrawn at the latest by June 2016.
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 ISO 2320:2008.
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, Former Yugoslav Republic of Macedonia,
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 2320:2015 has been approved by CEN as EN ISO 2320:2015 without any modification.
INTERNATIONAL ISO
STANDARD 2320
Fifth edition
2015-12-01
Fasteners — Prevailing torque steel
nuts — Functional properties
Fixations — Écrous autofreinés en acier — Caractéristiques
fonctionnelles
Reference number
ISO 2320:2015(E)
©
ISO 2015
ISO 2320:2015(E)
© ISO 2015, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
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Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
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ii © ISO 2015 – All rights reserved
ISO 2320:2015(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols . 2
5 Thread . 3
6 Lubrication . 3
7 Mechanical properties of prevailing torque nuts . 3
8 Functional requirements for prevailing torque properties . 3
9 Test method .11
9.1 General .11
9.2 Proof load test .11
9.3 Prevailing torque test .11
9.3.1 General.11
9.3.2 Test apparatus .12
9.3.3 Test parts .12
9.3.4 Test procedure .13
9.3.5 Test report .15
Annex A (normative) Temperature influence on prevailing torques of nuts with non-
metallic insert .16
Annex B (informative) Principles for the evaluation of the total coefficient of friction, μ .17
tot
Annex C (informative) Test clamp force and prevailing torques for prevailing torque nuts
M3 and M4 in property classes 8 and 10 .18
Bibliography .20
ISO 2320:2015(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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 2, Fasteners, Subcommittee SC 12, Fasteners
with metric internal thread.
This fifth edition cancels and replaces the fourth edition (ISO 2320:2008), which has been technically
revised. The following changes have been made:
— property class 9 has been deleted;
— prevailing torques for nuts M3 and M4 have been moved to Annex C;
— in the test fixture, the thread protrusion through the prevailing torque feature has been changed to
3 to 5 pitches;
— the reference surface condition for the test bolt has been specified in accordance with ISO 16047
(plain surface, uncoated and degreased, unless otherwise agreed);
— the determination of the prevailing-off torque has been changed from the upper value to the
minimum value (new point 5 in Figure 2), which changes the acceptance conditions;
— other editorial revisions.
iv © ISO 2015 – All rights reserved
INTERNATIONAL STANDARD ISO 2320:2015(E)
Fasteners — Prevailing torque steel nuts — Functional
properties
1 Scope
This International Standard specifies the functional properties for prevailing torque steel nuts when
tested at an ambient temperature range of +10 °C to +35 °C. It includes a combined test method to
determine the prevailing torque properties and the torque/clamp force properties at the same time.
It applies to prevailing torque all metal type nuts and prevailing torque non-metallic insert type nuts:
— with triangular ISO thread in accordance with ISO 68-1;
— with diameter/pitch combination in accordance with ISO 261 and ISO 262;
— with coarse pitch thread M5 to M39 or with fine pitch thread M8 × 1 to M39 × 3;
— with thread tolerances in accordance with ISO 965-2;
— with mechanical properties in accordance with ISO 898-2;
Prevailing torque values specified in this standard are based on laboratory test conditions.
NOTE 1 Actual prevailing torques in practical application can vary.
NOTE 2 All metal type nuts conforming to the requirements of this International Standard are used in
applications ranging from −50 °C to +150 °C.
NOTE 3 Non-metallic insert type nuts conforming to the requirements of this International Standard are used
in applications ranging from −50 °C to +120 °C.
WARNING — Temperatures outside the ambient temperature range can influence the functional
properties (torque/clamp force and prevailing torque properties), see Annex A.
2 Normative references
The following referenced documents,
...
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