ISO INTERNATIONAL 3221 STANDARD Second edition 1998-11-15 Aerospace Nuts, anchor, self-locking, fixed, 9o° corner, with counterbore, with MJ threads, classifications: 1 100 MPa (at ambient temperature)/235 °C, 1 100 MPa (at ambient temperature)/315 °C and 1 100 MPa (at ambient temperature)/425 °C - Dimensions Aeronautique et espace — Ecrous a river, a freinage interne, fixes, na11 d'angle 90°, avec chambrage, a filetage MJ, classifications: 1 100 MPa (a température ambiante)/235 °C, 1 100 MPa (a température ambiante)/315 °C et 1 100 MPa (a température ambiante)/425 °C- Dimensions 1011 inn AADRINKA ISO Reference number ISO 3221:1998(E) ISO 3221:1998(E) Foreword ISO(theInternational 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 technicalcommittees.Eachmemberbodyinterestedina subjectforwhich 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. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. 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. International Standard ISO 3221 was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles, Subcommittee SC 4, Aerospace fastener systems. This second edition cancels and replaces the first edition (ISO 3221:1989), which has been technically revised. mn 1011 inn inn 1IL1 ISO 1998 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced microfilm, without permission in writing from the publisher. InternationalOrganizationforStandardization Case postale 56 . CH-1211 Geneve 20 . Switzerland Internet iso@iso.ch Printed in Switzerland ii ISO 3221:1998(E) @ ISO Introduction The dimensions specified in this International Standard have been determined to allow production of a part which will satisfy the requirements of the procurement specification IsO 5858. na11 101 mn inn inn 11IL1 AANRINKA ii