ISO INTERNATIONAL STANDARD 5864 Second edition 1993-12-15 IsO inch screw threads -- Allowances and tolerances Filetages sO en inches Jeux et tolérances ISO Referencenumber ISO 5864:1993(E) er license with ISC /9972545001 prking permitted without license from IHS ISO5864:1993(E) Contents Page 1 Scope 2 Normative references 3 Definitions 4 Symbois and abbreviations 5 Sizes and series 6 Thread classes 2 7 Allowances and formulae 2 8 Tolerancesandformulae 2 9 Accuracy 10 Design profiles (maximum material profile) and disposition of tolerances 3 11 Modified threads 3 12 Lengths of thread engagement 3 13 Root radius control 14 Designation ISO1993 All rights reserved. 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 per mission in writing from the publisher. International Organization for Standardization Case Postale 56: CH-1211 Geneve 20 : Switzerland Printed in Switzerland ii Copyright International Organization for Standardization 997254500 ISO5864:1993(E) Foreword ISO(the International Organization for Standardization) is a worldwide federation of national standards bodies (lSO 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 (lEC)onallmattersofelectrotechnicalstandardization. circulated to the member bodies for voting. Publication as an International a vote. International Standard ISO 5864 was prepared by Technical Committee ISO/TC 1, Screw threads, Sub-Committee sC 2, Tolerances. This second edition cancels and replaces the first edition (IS0 5864:1978), tables 2 and 4 of which have been technically revised. iii Copyrightitemational Organizationfor Standardization /9972545001 tworking permitted without license from IHS