ISO INTERNATIONAL STANDARD 5855-3 Second edition 1999-10-15 Aerospace MJ threads - Part 3: Limit dimensions for fittings for fluid systems Aéronautique et espace-Filetage MJ- Partie 3: Dimensions limites pour raccordements de systemes de fluides ISO Reference number ISO 5855-3:1999(E) THS under Not for Resale ISO 5855-3:1999(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (isO memberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnical liaison with isO, also take part in the work. IsO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 3. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. International Standard ISO 5855-3 was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles Subcommittee SC 4, Aerospace fastener systems. This second edition cancels and replaces the first edition (IsO 5855-3:1988), of which it constitutes a technical revision Part 1: General requirements Part 2: Limit dimensions for bolts and nuts Part 3: Limit dimensions for fittings for fluid systems @ISO1999 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic ormechanical,includingphotocopyingandmicrotilm,withoutpermissioninwritingfromthepublisher nternationalOrganizationforStandardization Casepostale56·CH-1211Geneve20·Switzerland Internet [email protected] Printed in Switzerland tional Organization for Standardizatior ISO 5855-3:1999(E) INTERNATIONALSTANDARD @ISO Aerospace MJ threads Part 3: Limit dimensions for fittings for fluid systems 1 Scope This part of IsO 5855 specifies limit dimensions of MJ threads for fluid systems fittings for aerospace construction. 2 Normative references Thefollowingnormativedocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthis part of isO 5855. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of IsO 5855 are encouraged to investigate the possibility of applying the most recent edition of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of iSO and IEC maintain registers of currently valid International Standards. IsO 965-1:1998, IsO general-purpose metric screw threadsTolerances Part 1: Principles and basic data IsO5855-1:1999,Aerospace—MJ threads—Part1:General requirements. 3 Nominal diameters and pitches See Table 1. Table 1 Nominal diameters and pitches Dimensions in millimetres Nominal diameter Pitch Nominal diameter Pitch d or D P d or D 8 1 27 10 30 12 1,25 33 1,5 14 36 16 39 18 1,5 42 20 48 2 22 50 24 Copyright InternationalOrganizationfor Standardization Not for Resale