ISO INTERNATIONAL STANDARD 2901 Third edition 2016-09-15 IsO metric trapezoidal screw threads Basic and design profiles Filetages meétriques trapezoidaux IsoProfils de base et nominal Reference number IS0 2901:2016(E) ISO @IS02016 ational Organization for Standardizatior Provided by IHS under lic IS0 2901:2016(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2016, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form 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 Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +4122 749 09 47 [email protected] www.iso.org Provided by IHS under license with IS IS0 2901:2016(E) Contents Page Foreword ..iv 1 Scope 2 Normativereferences 3 Terms and definitions 4 Symbols. ..1 5 Basic profile. ..2 6 Design profile. ..4 Bibliography .6 IntematonalaniaionAllrightsreered ili