ISO/TR TECHNICAL REPORT 16224 First edition 2012-04-01 Technical aspects of nut design Aspects techniques de conception des écrous Reference number ISO/TR 16224:2012(E) ISO @ISO2012 by IHS under lic No reproduction Not for Resale ISO/TR16224:2012(E) COPYRIGHTPROTECTEDDOCUMENT ISO2012 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 + 4122 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ ISO 2012 -All rights reserved No reproductic etworking permitted without license from IHS Not for Resale ISO/TR16224:2012(E) Contents Page Foreword ..iv 1 Scope 2 Normative reference : Symbols 4 Design principle.. 3 4.1 Possible fracture modes in bolt and nut assemblies subjected to tensile load 4.2 Calculation of the fracture loads in bolt and nut assemblies 3 4.3 Influencing factors on the loadability of bolt and nut assemblies. 5 Calculation methods of bolt and nut assemblies in accordance with Alexander's theory 8 5.1 General.. 8 5.2 Minimum nut height for nuts with specific hardness range 5.3 Minimum hardness for nuts with specific nut height... 10 5.4 Proofload 11 6 Comparison among specified values in Iso 898-2 and calculated results . 11 6.1 General considerations for obtaining the specified values.. 11 6.2 Calculation of the minimum Vickers hardness (HV) and the stress under proof load (Sp) fo individual nuts of style 1 and style 2.. 11 6.3 Consequences for iso nut design.... 14 Bibliography. 15 ili e with I nse from IHS Not for Resale