ISO 4229:2017
(Main)Assembly tools for screws and nuts - Single-head engineer's wrenches for lower torque applications - Maximum outside dimensions of heads and test torques
Assembly tools for screws and nuts - Single-head engineer's wrenches for lower torque applications - Maximum outside dimensions of heads and test torques
ISO 13778:2017 specifies requirements of single-head engineer's wrenches with nominal width across flats from 3,2 to 120. It specifies the maximum outside dimensions of heads and gives the test torque values. The "lower torque application" designation is in accordance with the smaller head dimensions. NOTE The wrenches covered by this document are the ones identified in ISO 1703:2005 under reference Nos. 1 1 01 01 0 and 1 1 01 01 1.
Outils de manoeuvre pour vis et écrous — Clés à fourche simples pour applications aux couples plus faibles — Dimensions extérieures maximales d'encombrement des têtes et couples d'essai
ISO 4229:2017 spécifie les exigences des clés à fourche simples avec des dimensions nominales des surplats de 3,2 à 120. Il spécifie les dimensions maximales d'encombrement des têtes et donne les valeurs des couples d'essai. La désignation « application aux couples plus faibles » est conforme aux plus petites dimensions de têtes. NOTE les clés à fourche couvertes par le présent document sont celles identifiées dans l'ISO 1703:2005 sous les numéros 1 1 01 01 0 et 1 1 01 01 1.
General Information
- Status
- Published
- Publication Date
- 03-Apr-2017
- Technical Committee
- ISO/TC 29/SC 10 - Assembly tools for screws and nuts, pliers and nippers
- Drafting Committee
- ISO/TC 29/SC 10 - Assembly tools for screws and nuts, pliers and nippers
- Current Stage
- 9093 - International Standard confirmed
- Start Date
- 09-Nov-2023
- Completion Date
- 13-Dec-2025
Relations
- Effective Date
- 11-Oct-2014
Overview
ISO 4229:2017 specifies dimensional and performance requirements for single-head engineer’s wrenches for lower torque applications. It applies to wrenches with a nominal width across flats from 3.2 mm to 120 mm, defining maximum outside head dimensions and the required test torques. The standard helps manufacturers, purchasers and users ensure wrench compatibility with confined spaces and the intended lower-torque use.
Key topics and requirements
- Scope: Single-head engineer’s wrenches (nominal widths s = 3.2–120 mm). Note: the wrenches covered are those referenced in ISO 1703:2005.
- Maximum outside dimensions: Table 1 and Figure 1 in the standard give the maximum external head dimensions for each nominal width across flats. For many sizes:
- For s ≤ 85 mm: b = 2.1s + 5 (max)
- For s > 85 mm: b = 2s + 8 (max)
- For s > 13 mm: t = 0.4s
- Tolerances are referenced to ISO 691.
- Hardness: The required hardness of the wrenches is specified by reference to ISO 1711-1.
- Torque testing: Torque test requirements follow ISO 1711-1, except ISO 4229:2017 requires test torque values equal to one half of the values given in ISO 1711-1, series C, reflecting the “lower torque application” designation.
- Designation and marking:
- Designation format: e.g., “Wrench ISO 4229 – 18” for s = 18 mm.
- Permanent marking must include the wrench opening value and the manufacturer name or trademark.
Applications and who uses this standard
ISO 4229:2017 is practical for:
- Tool manufacturers designing single-head engineer’s wrenches for confined or low-torque applications.
- Procurement and quality teams specifying conformity for purchased tools.
- Design and assembly engineers checking clearance and head envelope for tight assemblies.
- Maintenance and service technicians selecting appropriate lower-torque wrenches to avoid over-torquing fasteners.
- Standards and compliance officers referencing test torque and hardness requirements during inspection and acceptance.
Practical benefits include consistent tool sizing, assured torque performance for sensitive assemblies, and clearer marking for inventory and traceability.
Related standards
- ISO 1711-1 - Technical specifications for hand-operated wrenches and sockets (hardness and torque testing reference)
- ISO 691 - Wrench and socket openings - Tolerances for general use
- ISO 1703:2005 - Designation and nomenclature (reference IDs)
- ISO 272 - Hexagon product widths across flats (some s values relate to this)
Keywords: ISO 4229:2017, single-head engineer’s wrenches, lower torque applications, maximum outside dimensions, test torque, nominal width across flats, torque testing, hardness, ISO 1711-1.
ISO 4229:2017 - Assembly tools for screws and nuts -- Single-head engineer's wrenches for lower torque applications -- Maximum outside dimensions of heads and test torques
ISO 4229:2017 - Outils de manoeuvre pour vis et écrous -- Clés a fourche simples pour applications aux couples plus faibles -- Dimensions extérieures maximales d'encombrement des tetes et couples d'essai
Frequently Asked Questions
ISO 4229:2017 is a standard published by the International Organization for Standardization (ISO). Its full title is "Assembly tools for screws and nuts - Single-head engineer's wrenches for lower torque applications - Maximum outside dimensions of heads and test torques". This standard covers: ISO 13778:2017 specifies requirements of single-head engineer's wrenches with nominal width across flats from 3,2 to 120. It specifies the maximum outside dimensions of heads and gives the test torque values. The "lower torque application" designation is in accordance with the smaller head dimensions. NOTE The wrenches covered by this document are the ones identified in ISO 1703:2005 under reference Nos. 1 1 01 01 0 and 1 1 01 01 1.
ISO 13778:2017 specifies requirements of single-head engineer's wrenches with nominal width across flats from 3,2 to 120. It specifies the maximum outside dimensions of heads and gives the test torque values. The "lower torque application" designation is in accordance with the smaller head dimensions. NOTE The wrenches covered by this document are the ones identified in ISO 1703:2005 under reference Nos. 1 1 01 01 0 and 1 1 01 01 1.
ISO 4229:2017 is classified under the following ICS (International Classification for Standards) categories: 25.140.30 - Hand-operated tools. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO 4229:2017 has the following relationships with other standards: It is inter standard links to ISO 4229:2009. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase ISO 4229:2017 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of ISO standards.
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 4229
Third edition
2017-04
Assembly tools for screws and nuts —
Single-head engineer’s wrenches
for lower torque applications —
Maximum outside dimensions of
heads and test torques
Outils de manœuvre pour vis et écrous — Clés à fourche simples
pour applications aux couples plus faibles — Dimensions extérieures
maximales d’encombrement des têtes et couples d’essai
Reference number
©
ISO 2017
© ISO 2017, 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 +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Maximum outside dimensions of heads . 1
5 Technical specifications . 3
5.1 Hardness . 3
5.2 Torque testing . 3
6 Designation . 4
7 Marking . 4
Bibliography . 5
Foreword
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ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
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Attention is drawn to the possibility that some of the elements of this document may be the subject of
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Any trade name used in this document is information
...
NORME ISO
INTERNATIONALE 4229
Troisième édition
2017-04
Outils de manoeuvre pour vis et
écrous — Clés à fourche simples
pour applications aux couples plus
faibles — Dimensions extérieures
maximales d’encombrement des
têtes et couples d’essai
Assembly tools for screws and nuts — Single-head engineer’s
wrenches for lower torque applications — Maximum outside
dimensions of heads and test torques
Numéro de référence
©
ISO 2017
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2017, Publié en Suisse
Droits de reproduction réservés. Sauf indication contraire, 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, l’affichage sur
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l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – Tous droits réservés
Sommaire Page
Avant-propos .iv
1 Domaine d’application . 1
2 Références normatives . 1
3 Termes et définitions . 1
4 Dimensions maximales d’encombrement des têtes . 1
5 Spécifications techniques . 3
5.1 Dureté . 3
5.2 Couples d’essai . 3
6 Désignation . 4
7 Marquage . 4
Bibliographie . 5
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
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gouvernementales et non gouvernementales, en liaison avec l’ISO participent également aux travaux.
L’ISO collabore étroitement avec la Commission électrotechnique internationale (IEC) en ce qui
concerne la normalisation électrotechnique.
Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont
décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier de prendre note des différents
critères d’approbation requis pour les différents types de documents ISO. Le présent document a été
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Les appellations commerciales éventuellement mentionnées dans le présent document sont données
pour information, par souci de commodité à l’intention des utilisateurs et ne sauraient constitu
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