ISO INTERNATIONAL STANDARD 3800 First edition 1993-12-15 Threaded fasteners --- Axial load fatigue testing Test methods and evaluation of results Elements de fixation filetés -- Essais de fatigue sous charge axiale Méthoded'essai etévaluation des résultats Referencenumber ISO3800:1993(E) Copyright International Organization for Standardizatior No reproduction or networking pemited without license from IHS Not for Resale ISO 3800:1993(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. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International a vote. International Standard IsO 3800 was prepared by Technical Committee ISO/TC2， Fasteners, Subcommittee e sc 1, Mechanical properties of fasteners. This first edition of ISO 3800 cancels and replaces 1SO 3800-1:1977, which has been technically revised. ISO1993 All rights reserved. Uniess 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 the publisher. International Organization for Standardization CasePostale56·CH-1211Geneve20·Switzerland Printed in Switzerland ii HS under license with I Not for Resale ISO 3800:1993(E) INTERNATIONAL STANDARD ISO Threaded fasteners Axial load fatigue testing Test methods and evaluation of results Scope based onthis InternationalStandard are encouraged to investigate the possibility of applying the most re- This International Standard specifies the conditions for cent editions of the standards indicated below. carrying out axial load fatigue tests on threaded Members of IEC and ISO maintain registers of cur- fasteners,as well as recommendations forthe evalu rently valid International Standards. ation of the results. IsO 273:1979, Fasteners - Clearanceholesforbolts Unless otherwise agreed, the tests are of the fluctu- and screws. ating tension type and are carried out at room tem perature, the loading applied being centric along the Iso 554:1976, Standard atmospheres for conditioning iongitudinal axis of the fastener. The influence of the and/or testing -- Specifications. compliance of clamped parts on the strain of the fastener is not taken into account. IsO 885:1976, General purpose bolts and screws Metric series --- Radii under the head. This method allows determination of the fatigue strength of threaded fasteners. Iso 4032:1986, Hexagon nuts, styie 1 — Product grades A and B. Thetest results canbe influencedbythe testcondi tions. For this reason,minimum reguirements are ISO 4033:1979, Hexagon nuts, style 2 — Product specified to reduce this effect. In addition, calibration grades A and B. and centring control methods for the testing appar atus are included. Iso 8673:1988, Hexagon nuts, style 1, with metric fine pitch thread - Product grades A and B. 2 Normative references Iso 8674:1988, Hexagon nuts, style 2, with metric The following standards contain provisions which, fine pitch thread Product grades A and B. through reference in this text, constitute provisions of this International Standard. At the time of publi- 3: Symbols and their designations cation, the editions indicated were valid. All standards are subject to revision, and parties to agreements See table 1. 1