4851903 0618028 053 INTERNATIONAL ISO STANDARD 6157-2 First edition 1995-08-01 Fasteners - Surface discontinuities Part 2: Nuts Eléments de fixation -Defauts de surface Partie 2: Ecrous ISO Reference number ISO6157-2:1995(E) Copyright International Organization for Standardization Not for Resale 4851903 0618029 T9T ISO 6157-2:1995(E) Foreword IsO (the International Organization for Standardization) is a worldwide of preparing International Standards is normally carried out through IsO technicalcommittees. 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. ISO/TC 2. Fasteners, Subcommittee SC 1, Mechanical properties of fasteners. ISO Fasteners - Surface discontinuities: Part1:Boits,screwsandstudsforgeneralrequirements -- Part 2: Nuts Part3:Bolts,screwsandstudsforspecialrequirements CISO1995 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 the publisher. InternationaiOrganizationforStandardization CasePostale56·CH-1211Geneve20·Switzerland Printed in Switzerland 1 Copyright International Organization for Standardization e from IHS Not for Resale 4851903 0618030701 INTERNATIONAL STANDARD ISO ISO 6157-2:1995(E) Fasteners - Surface discontinuities -- Part 2: Nuts 1 Scope This part of IsO 6157 establishes limits for various types of surface discontinuities on nuts. It applies to nuts with - nominal thread diameters from 5 mm up to and including 39 mm; product grades A and B: agreed between supplier and purchaser. 2 Normative references of Is 6157. At the time of publication, the editions indicated were valid. All standards are subject to revision, and most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. thread. Iso 898-6:1994, Mechanical properties of fasteners - Part 6: Nuts with specified proof load values Fine pitch thread. Iso 2320:1983, Prevailing torque type steel hexagon nuts -- Mechanical and performance properties. IsO 3269:1988, Fasteners - -Acceptance inspection. Iso 10484:-1), Widening test on nuts. Iso10485:1991, Coneproof load teston nuts. 1) To be published. Copyright Intemational Organization for Standardizatio Not for Resale