ISO INTERNATIONAL STANDARD 965-5 First edition 1998-12-15 IsO general purpose metric screw threads Tolerances - Part 5: Limits of sizes for internal screw threads to mate with hot-dip galvanized external screw threads with maximum size of tolerance position h before galvanizing Filetages metriques IsO pour usages généraux - Tolérances Partie 5:Dimensions limites pour filetages interieurs pourassemblages avec des filetages extérieurs galvanisés a chaud de position de tolérance maximale h avant galvanisation ISO Referencenumber ISO 965-5:1998(E) ISO 965-5:1998(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (isO member bodies). The work of preparing International Standards is normally carried out through isO technical liaison with IsO, also take part in the work. IsO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. International Standard ISO 965-5 was prepared by Technical Committee ISO/TC 1, Screw threads, Subcommittee SC 2, Tolerances. Tolerances Part 1: Principles and basic data 一 Part 2: Limits of sizes for general purpose bolt and nut threads - Medium quality Part 3: Deviations for constructional screw threads tolerance position H or G after galvanizing Part 5: Limits of sizes for internal screw threads to mate with hot-dip galvanized external screw threads with maximum size of tolerance position h before galvanizing ISO1998 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic nternationalOrganizationforStandardizatior Case postale 56 : CH-1211 Geneve 20 · Switzerland Internet [email protected] Printed in Switzerland ii INTERNATIONAL STANDARD @ISO ISO965-5:1998(E) IsO general purpose metric screw threads Tolerances - Part 5: Limits of sizes for internal screw threads to mate with hot-dip galvanized external screw threads with maximum size of tolerance position h before galvanizing 1 Scope This part of IsO 965 specifies deviations and limits of sizes for pitch and crest diameters for IsO general purpose metric internal screw threads conforming to IsO 262 having basic profile according to ISO 68-1. maximum size of tolerance position h before hot-dip galvanizing. The limits of sizes for the tolerance quality specified are derived from tolerances specified in IsO 965-1. The fundamental deviations for internal screw threads with a tolerance position Az have been calculated according to the following formula: EIAZz = + (300 + 20P) where El is expressed in micrometres; P is expressed in millimetres. The fundamental deviations for internal screw threads with a tolerance position Ax have been calculated according to the following formula: EIAx = + (220P - 20) where El is expressed in micrometres; P is expressed in milimetres. Products made with thread tolerances according to this part of IsO 965 may show load failure when tested in accordance with IsO 898-2 without adjustment of the other mechanical properties. of thread stripping. NOTE centrifuged after hot-dip galvanizing. with heavy coating not centrifuged. 1