ISO INTERNATIONAL STANDARD 7091 Second edition 2000-06-01 Plain washers Normal series Product grade C Rondelles plates - Série normale - Grade C Reference number ISO 7091:2000(E) ISO @ ISO 2000 ISO 7091:2000(E) PDFdisclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, 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 area. Adobe is atrademarkof Adobe Systems Incorporated Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by isO member bodies. In the unlikely event ?ISO2000 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 22 734 10 79 E-mail [email protected] Web www.iso.ch Printed in Switzerland ii @ ISO 2000 - All rights reserved ISO 7091:2000(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 ISsO technical 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. 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 International Standard may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights International Standard ISO 7091 was prepared by Technical Committee ISO/TC 2, Fasteners. This second edition cancels and replaces the first edition (isO 7091:1983), which has been technically revised. @ ISO 2000 -All rights reserved ii ISO 7091:2000(E) INTERNATIONAL STANDARD Plain washers Normal series Product grade C 1 Scope This International Standard specifies the characteristics of normal-series, product-grade-C plain washers in the Washers of hardness class 100 HV are suitable for hexagon bolts and screws of product grade C in property classes up to and including 6.8 case-hardened thread rolling screws. given in ISO 887. When soft material pieces are clamped, or large clearance holes in the workpiece are used, the user should check the technical suitability of this type of washer. @ ISO 2000 - All rights reserved ISO 7091:2000(E) 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications donotapply.However,partiestoagreementsbasedonthisInternationalStandardareencouragedto undated references, the latest edition of the normative document referred to applies. Members of IsO and IEC maintain registers of currently valid International Standards. IsO 887:2000, Plain washers for metric bolts, screws and nuts for general purposes - General plan IsO 3269:2000, FastenersAcceptance inspection. IsO 4042:1999, Fasteners- Electroplated coatings. IsO4759-3:2000,Tolerancesforfasteners—Part3:Plainwashersforbolts,screwsandn