ISO INTERNATIONAL STANDARD 15872 Second edition 2017-03 Aerospace UNJ threads Gauging Aeronautique et espace-FiletageUNJ-Verificationparcalibres Referencenumber IS015872:2017(E) Intemational Organization for Standardization @IS02017 e=ZHEJIANG INSTOFSTANDARDIZATION C15956617 No reproduction or itted without license from IHS IS015872:2017(E) COPYRIGHTPROTECTEDDOCUMENT IS02017,Published in Switzerland 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 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 Uicensee-ZHEJIANG INSTOF STANDARDIZRoISQl.7 -All rights reserved etworking permitted without license from IHS Not for Resale, 2017/5/16 00:37:00 IS015872:2017(E) Contents Page Foreword ..iv 1 Scope. ..1 2 Normativereferences ..1 3 Terms, definitions, symbols and abbreviated terms 3.1 Terms and definitions .1 3.2 Symbolsandabbreviatedterms 2 Types of gauges. ..3 4.1 Gauges and setting plugs for external threaded products 3 4.2 Gaugesforinternalthreadedproducts 3 5 Referencetemperature 6 Function, design and use of gauges 6.1 Gauges for external threads. 4 6.1.1 Virtual pitch diameter indicating thread gauges .4 6.1.2 Solid or adjustable GO screw ringgauges 4 6.1.3 Simple pitch diameter indicating thread gauges .4 6.1.4 Major diameter gauges. .5 6.1.5 Minor diameter gauges. .5 6.1.6 Optical comparator checks 5 6.2 Gauging for internal threads. 5 6.2.1 GO screw plug gauges. .5 6.2.2 NOT GO screw plug gauges .5 6.2.3 Minor diameter gauges .5 6.2.4 Virtualpitch diameterindicatingthreadgauges 5 6.2.5 Simple pitch diameter indicating thread gauges .6 7 Setting ofgauges ..6 7.1 Setting gauges for external threads. .6 7.2 Setting ring gauge for indication thread gauges .6 8 Gauging of threads ..6 8.1 General. .6 8.2 Internalthreadsevaluation .7 Bibliography .22 iii 2e=ZHEJIANG INSTOFSTANDARDIZATION C15956617 ithoutlicense from IHS Not for Resale, 2017/5/16 00:37:00