ISO INTERNATIONAL STANDARD 12126 Second edition 2012-09-01 Prevailing torque type all-metal hexagon nuts with flange with metric fine pitch thread, style 2 Product grades A and B Ecrous hexagonaux a embase, autofreines, tout metal, a filetage métrique a pas fin, style 2 Grades A et B Reference number ISO12126:2012(E) LSO ISO2012 ISO 12126:2012(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-1211Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland = @ ISO 2012 -All rights reserved ISO12126:2012(E) Contents Page Foreword 1 Scope. 2 Normativereferences 7 3 Dimensions.. 4 Requirements and reference International Standards 4 5 Designation.. Annex A (informative) Gauging of hexagon nuts with flange. @ ISO 2012-Allrights reserved ili