ISO INTERNATIONAL STANDARD 10664 Third edition 2014-10-01 Hexalobular internal driving feature for bolts and screws Empreinte a six lobes internes pour vis Reference number ISO 10664:2014(E) ISO @ IS0 2014 IS0 10664:2014(E) COPYRIGHTPROTECTEDDOCUMENT @IS02014 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested 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 0111 Fax + 41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland ii @ IS0 2014 - All rights reserved IS0 10664:2014(E) Contents Page Foreword .iV 1 Scope. .1 2 Basic dimensions. 1 3 Gauging. 3.1 Principle 2 3.2 GO gauge. 3 3.3 No GO gauge 5 4 Designation L Annex A (informative) Representation of hexalobular internal driving feature contour. ..8 @ IS0 2014 -All rights reserved iii