ISO INTERNATIONAL STANDARD 7043 Third edition 2012-09-01 Prevailing torque type hexagon nuts with flange (with non-metallic insert), style 2 — Product grades A and B Ecrous hexagonaux a embase, autofreines (a anneau non metallique), style 2—Grades A et B Referencenumber ISO 7043:2012(E) @ISO 2012 ISO 7043:2012(E) COPYRIGHTPROTECTEDDOCUMENT ISO 2012 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 + 4122749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland ii @ ISO 2012 -All rights reserved ISO7043:2012(E) Contents Page Foreword 1 Scope. 2 Normativereferences 1 3 Dimensions. 4 Requirements and reference International Standards 5 Designation. AnnexA(informative)Gauging of hexagon nuts withflange. Bibliography @ ISO 2012-Allrights reserved ili ISO 7043:2012(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies non-governmental, in liaison with isO, also take part in the work. isO collaborates closely with the International Electrotechnical Commission (IEC) on allmatters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEc 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. ISO7043waspreparedbyTechnicalCommitteeISO/TC2,Fasteners,SubcommitteeSC12,Fastenerswith metric internal thread. This third edition cancels and replaces the second edition (isO 7043:1997), of which it constitutes a minor revision. iv @ISO 2012-All rights reserved ISO 7043:2012(E) INTERNATIONALSTANDARD Prevailing torque type hexagon nuts with flange (with non- metallic insert), style 2 Product grades A and B 1 Scope This International Standard specifies the characteristics of prevailing torque type hexagon nuts with flange and including M16 and product grade B for threads above M16, and with property classes 8, 9 and 10. NOTE The dimensions of the nuts correspond to those given in Iso 4161 plus prevailing torque feature. If other specifications are required, they can be selected from existing International Standards, for example 2 Normativereferences The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies.Forundated references, thelatest edition of the referenced document (including anyamendments)applies. Iso225,Fasteners—Bolts,screws,studsandnuts-Symbolsanddescriptionsofdimensions ISO261,/sOgeneralpurposemetricscrewthreads-Generalplan IsO724,/sOgeneral-purposemetricscrewthreads—Basicdimensions Iso 898-2,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 965-2,/sOgeneral purpose metric screwthreads-Tolerances-Part 2:Limitsof sizesforgeneral purpose externalandinternalscrewthreads-Mediumquality Iso2320,PrevailingtorquetypesteelnutsMechanicalandperformanceproperties Iso3269,Fasteners—Acceptanceinspection Iso 4042,FastenersElectroplated coatings IsO4759-1,Tolerances forfasteners—Part 1:Bolts,screws,studs and nuts-Product gradesA,BandC Iso6157-2,Fasteners-Surfacediscontinuities—Part2:Nuts Iso8992,Fasteners-G