ISO 1478:1999
(Main)Tapping screws thread
Tapping screws thread
Filetage de vis à tôle
La présente Norme internationale spécifie les dimensions des filetages et des extrémités de filetage des vis à tôle de filetage ST1,5 à ST9,5 inclus.
General Information
- Status
- Published
- Publication Date
- 03-Nov-1999
- Technical Committee
- ISO/TC 2/SC 13 - Fasteners with non-metric thread
- Drafting Committee
- ISO/TC 2/SC 13 - Fasteners with non-metric thread
- Current Stage
- 9093 - International Standard confirmed
- Start Date
- 10-Jul-2024
- Completion Date
- 13-Dec-2025
Relations
- Effective Date
- 15-Apr-2008
Overview
ISO 1478:1999 defines the thread form and thread ends for tapping screws (sheet metal screws). This International Standard - prepared by ISO/TC 2 (Fasteners) - covers tapping screw thread sizes ST1,5 to ST9,5 inclusive and provides dimensional limits, pitches and end-type requirements intended for consistent manufacture and interchangeability.
Key Topics
- Scope: Thread geometry and thread-end forms for tapping screws (sheet metal screws) sized ST1,5 → ST9,5.
- Dimensions and tolerances: Detailed thread pitches, maximum and minimum diameters, and reference dimensions are provided in the standard’s Table 1 and associated figures. These establish acceptable size ranges for manufacturing and inspection.
- Thread ends: Specifies permitted end types (notably Type C cone end, Type F, and Type R) and requirements for points:
- Type C: No extrusion of excess metal beyond the apex resulting from thread rolling; a slight rounding or truncation of the point is desirable.
- General note: ends should not be sharp to the touch; some rounding is acceptable.
- Incomplete thread length: Reference lengths for incomplete threads (thread run-out) are included.
- Designation: The standard gives the format for naming a tapping screw thread (example: “Tapping screw thread ISO 1478 - ST3,5”). Product standards may require the thread-end type to be specified in product designations.
Applications
ISO 1478 is used wherever consistent tapping screw threads are required:
- Manufacturers of sheet metal screws and fasteners - for tooling, thread rolling and quality control.
- Design and product engineers specifying sheet metal fastenings in electronics, appliance, automotive and construction assemblies.
- Quality inspectors and testing labs - to verify thread geometry and end conditions against standardized limits.
- Procurement and standards managers - to ensure purchased tapping screws meet internationally recognized dimensions and interchangeability criteria. Using ISO 1478 helps reduce assembly problems (poor fit, cross-threading, point damage) and ensures compatibility across suppliers.
Related Standards
- Prepared by ISO/TC 2 (Fasteners); users should reference relevant product standards for tapping screw materials, mechanical properties and head types. For complete fastening system requirements, combine ISO 1478 thread specifications with applicable product and material standards.
Keywords: ISO 1478, tapping screws, sheet metal screws, thread dimensions, thread ends, ST1.5, ST9.5, fastener standards.
Frequently Asked Questions
ISO 1478:1999 is a standard published by the International Organization for Standardization (ISO). Its full title is "Tapping screws thread". This standard covers: La présente Norme internationale spécifie les dimensions des filetages et des extrémités de filetage des vis à tôle de filetage ST1,5 à ST9,5 inclus.
La présente Norme internationale spécifie les dimensions des filetages et des extrémités de filetage des vis à tôle de filetage ST1,5 à ST9,5 inclus.
ISO 1478:1999 is classified under the following ICS (International Classification for Standards) categories: 21.040.30 - Special screw threads. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO 1478:1999 has the following relationships with other standards: It is inter standard links to ISO 1478:1983. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ISO 1478:1999 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 1478
Second edition
1999-08-01
Tapping screws thread
Filetage de vis à tôle
A
Reference number
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
committees. Each member body interested in a subject for which a technical committee has been established has
the right to be represented on that committee. International organizations, governmental and non-governmental, in
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/IEC Directives, Part 3.
Draft International Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.
International Standard ISO 1478 was prepared by Technical Committee ISO/TC 2, Fasteners.
This second edition cancels and replaces the first edition (ISO 1478:1983) which has been technically revised.
© ISO 1999
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic
or mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case postale 56 • CH-1211 Genève 20 • Switzerland
Internet iso@iso.ch
Printed in Switzerland
ii
INTERNATIONAL STANDARD © ISO ISO 1478:1999(E)
Tapping screws thread
1 Scope
This International Standard specifies the thread and thread ends for tapping screws (sheet metal screws) with
thread sizes from ST1,5 to ST9,5 inclusive.
2 Dimensions
See Figures 1 and 2 and Tab
...
NORME ISO
INTERNATIONALE 1478
Deuxième édition
1999-08-01
Filetage de vis à tôle
Tapping screws thread
A
Numéro de référence
Avant-propos
L'ISO (Organisation internationale de normalisation) est une fédération mondiale d'organismes nationaux de
normalisation (comités membres de l'ISO). L'élaboration des Normes internationales est en général confiée aux
comités techniques de l'ISO. Chaque comité membre intéressé par une étude a le droit de faire partie du comité
technique créé à cet effet. Les organisations internationales, gouvernementales et non gouvernementales, en
liaison avec l'ISO, participent également aux travaux. L'ISO collabore étroitement avec la Commission
électrotechnique internationale (CEI) en ce qui concerne la normalisation électrotechnique.
Les Normes internationales sont rédigées conformément aux règles données dans les Directives ISO/CEI, Partie 3.
Les projets de Normes internationales adoptés par les comités techniques sont soumis aux comités membres pour
vote. Leur publication comme Normes internationales requiert l'approbation de 75 % au moins des comités
membres votants.
La Norme internationale ISO 1478 a été élaborée par le comité technique ISO/TC 2, Éléments de fixation.
Cette deuxième édition annule et remplace la première édition (ISO 1478:1983), dont elle constitue une révision
technique.
© ISO 1999
Droits de reproduction réservés. Sauf prescription différente, aucune partie de cette publication ne peut être reproduite ni utilisée sous quelque
forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et les microfilms, sans l'accord écrit de l'éditeur.
Organisation internationale de normalisation
Case postale 56 • CH-1211 Genève 20 • Suisse
Internet iso@iso.ch
Imprimé en Suisse
ii
NORME INTERNATIONALE © ISO ISO 1478:1999(F)
Filetage de vis à tôle
1 Domaine d’application
La présente Norme internationale spécifie les dimensions des filetages et des extrémités de filetage des vis à tôle
de filetage ST1,5 à ST9,5 inclus.
2 Dimensions
Voir Figures 1 et 2 et Tableau
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.
Loading comments...