ISO-2320-2008.pdf
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1、 Reference number ISO 2320:2008(E) ISO 2008 INTERNATIONAL STANDARD ISO 2320 Fourth edition 2008-11-01 Prevailing torque type steel nuts Mechanical and performance properties crous autofreins en acier Caractristiques mcaniques et performances Copyright International Organization for Standardization P
2、rovided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 01/29/2009 22:36:05 MSTNo reproduction or networking permitted without license from IHS -,-,- ISO 2320:2008(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy,
3、this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobes licensing policy. The ISO Central Secr
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5、sure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2008 All rights reserved. Unless otherwise specified, no part of this publicat
6、ion 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 ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 2
7、0 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2008 All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 01/29/2009 22:
8、36:05 MSTNo reproduction or networking permitted without license from IHS -,-,- ISO 2320:2008(E) ISO 2008 All rights reserved iii Contents Page Foreword iv 1 Scope . 1 2 Normative references. 1 3 Terms and definitions. 2 4 Symbols. 2 5 Thread 3 6 Lubrication 3 7 Mechanical properties of prevailing t
9、orque type nuts 3 8 Performance requirements for prevailing torque properties. 3 9 Test method. 12 9.1 General. 12 9.2 Proof load test. 12 9.3 Prevailing torque test. 12 Annex A (normative) Temperature resistance of prevailing torque non-metallic insert type nuts. 17 Annex B (informative) Basis for
10、the evaluation of the total coefficient of friction, tot. 18 Bibliography. 19 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 01/29/2009 22:36:05 MSTNo reproduction or networking permitted without license f
11、rom IHS -,-,- ISO 2320:2008(E) iv ISO 2008 All rights reserved 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 com
12、mittees. 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
13、 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 Internatio
14、nal 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 t
15、he subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 2320 was prepared by Technical Committee ISO/TC 2, Fasteners, Subcommittee SC 1, Mechanical properties of fasteners. This fourth edition cancels and replaces the third edition (ISO 2320:
16、1997), which has been technically revised. It also incorporates the Technical Corrigendum ISO 2320:1997/Cor.1:2006. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 01/29/2009 22:36:05 MSTNo reproduction or
17、networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO 2320:2008(E) ISO 2008 All rights reserved 1 Prevailing torque type steel nuts Mechanical and performance properties 1 Scope This International Standard specifies the mechanical and performance properties for prevailing to
18、rque type steel nuts when tested at an ambient temperature range of +10 C to +35 C. It includes a single test to determine the prevailing torque properties (performance properties) and/or the torque/clamp force properties. This International Standard applies to prevailing torque all metal type nuts
19、and prevailing torque non-metallic insert type nuts: a) with triangular ISO thread according to ISO 68-1; b) with diameter/pitch combination according to ISO 261 and ISO 262; c) with coarse pitch thread M3 to M39 and mechanical properties according to ISO 898-2; d) with fine pitch thread M81 to M393
20、 and mechanical properties according to ISO 898-6; e) within the temperature range of 50 C to +150 C for prevailing torque all metal type nuts; NOTE 1 See Clause 7, paragraph 3. f) within the temperature range of 50 C to +120 C for prevailing torque non-metallic insert type nuts. NOTE 2 See Clause 7
21、, paragraph 4. 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 273:197
22、9, Fasteners Clearance holes for bolts and screws ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel Part 1: Bolts, screws and studs ISO 898-2, Mechanical properties of fasteners Part 2: Nuts with specified proof load values Coarse thread ISO 898-6, Mechanical propert
23、ies of fasteners Part 6: Nuts with specified proof load values Fine pitch thread ISO 965-2, ISO general purpose metric screw threads Tolerances Part 2: Limits of sizes for general purpose external and internal screw threads Medium quality ISO 16047, Fasteners Torque/clamp force testing Copyright Int
24、ernational Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 01/29/2009 22:36:05 MSTNo reproduction or networking permitted without license from IHS -,-,- ISO 2320:2008(E) 2 ISO 2008 All rights reserved 3 Terms and definitions For t
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