Fasteners - Hexagon socket set screws with cup point (ISO 4029:2026)

This document specifies the characteristics of hexagon socket set screws with cup point, with metric coarse pitch threads M1,6 to M30 for steel and M1,6 to M24 for stainless steel, and with product grade A.
Set screws are not intended for use under tensile load.
If in certain cases other specifications are requested, hardness classes and stainless steel grades can be selected from ISO 898-5 or ISO 3506-3, and dimensional options from ISO 888, ISO 965-1 or ISO 4753.

Verbindungselemente - Gewindestifte mit Innensechskant und Ringschneide (ISO 4029:2026)

Fixations - Vis sans tête à six pans creux, à bout cuvette (ISO 4029:2026)

Le présent document spécifie les caractéristiques des vis sans tête à six pans creux à bout cuvette, à filetage métrique à pas gros M1,6 à M30 pour l'acier et M1,6 à M24 pour l'acier inoxydable, et de grade A.
Les vis sans tête ne sont pas prévues pour être utilisées sous charge de traction.
Si dans certains cas d’autres spécifications sont requises, les classes de dureté et les grades d’acier inoxydable peuvent être choisis dans l’ISO 898-5 ou l’ISO 3506-3, et les options dimensionnelles dans l'ISO 888, l'ISO 965-1 ou l'ISO 4753.

Vezni element - Navojni zatiči z notranjim šestkotnikom in obročastim rezilom (ISO 4029:2026)

Ta dokument določa lastnosti imbus vijakov s čepom s koničasto konico, z metričnimi grobimi navoji od M1,6 do M30 za jeklo in od M1,6 do M24 za nerjavno jeklo ter s kakovostnim razredom A.
Imbus vijaki niso namenjeni uporabi pod natezno obremenitvijo.
Če so v določenih primerih zahtevane druge specifikacije, se lahko razredi trdote in vrste nerjavnega jekla izberejo iz ISO 898-5 ali ISO 3506-3, dimenzijske možnosti pa iz ISO 888, ISO 965-1 ali ISO 4753.

General Information

Status
Published
Public Enquiry End Date
06-Jul-2025
Publication Date
02-Apr-2026
Technical Committee
ISEL - Mechanical elements
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
18-Mar-2026
Due Date
23-May-2026
Completion Date
03-Apr-2026

Relations

Effective Date
04-Mar-2026
Effective Date
08-Nov-2023

Overview

The oSIST prEN ISO 4029:2025:2025 standard, titled Fasteners - Hexagon socket set screws with cup point, is a critical international document developed by CEN in collaboration with ISO/TC 2/SC 11. It specifies the dimensions, requirements, mechanical properties, and marking of hexagon socket set screws with cup points for metric threads ranging from M1.6 up to M30 for steel, and M1.6 to M24 for stainless steel, under product grade A.

This updated 2025 edition supersedes the previous ISO 4029:2003, incorporating enhanced technical revisions, such as the addition of M30 sizes for steel screws, updated marking and labeling requirements, and the exclusion of non-ferrous metal screws.

Key Topics

  • Scope & Application:
    Applies to hexagon socket set screws with cup point and coarse metric pitch threads from M1.6 up to M30 (steel) or M24 (stainless steel). Designed primarily for fastening applications where tensile loads are not predominant.

  • Dimensions & Tolerances:
    Comprehensive dimensional specifications, including thread pitch, lengths, and socket geometry, conforming to related ISO standards such as ISO 225, ISO 724, and ISO 4759-1.

    • Standard and short lengths with chamfering options detailed.
    • Dimensional tolerances ensure interchangeability and quality control.
  • Materials & Mechanical Properties:
    The standard covers steel and stainless steel variants with prescribed hardness classes:

    • Steel: Hardness class 45H.
    • Stainless steel: Grades A1, A2, A3, A4, A5 with hardness classes 12H to 21H according to ISO 3506-3.
      Additional requirements for coatings and surface finishes include electroplated and non-electrolytically applied zinc flake coatings.
  • Coatings & Surface Integrity:
    Surface conditions range from as-processed to passivated for stainless steel, ensuring corrosion resistance and durability, as governed by ISO 4042 and ISO 10683.

  • Marking & Labelling:
    Product marking on screws is optional unless specified by purchaser. Packaging labeling must include:

    • Reference to ISO 4029 standard, thread size, nominal length, hardness or grade class, surface finish, manufacturer identification, batch number, and quantity.
  • Designation System:
    Descriptions follow ISO 8991 guidelines, incorporating thread size, product grade, material hardness, and surface condition. Examples illustrate the proper designation format for steel and stainless steel screws.

Applications

Hexagon socket set screws with cup points are widely used in industries requiring secure fastening without external heads, for applications including:

  • Mechanical assemblies
  • Automotive components
  • Machinery where flush fastening is critical
  • Precision instruments
  • Electrical and electronic assemblies requiring reliable, adjustable fastening without tensile load

The cup point ensures firm gripping of assembled parts, preventing loosening under vibration or stress. Their metric sizing and standardized dimensions guarantee compatibility across global manufacturing and maintenance operations.

Related Standards

oSIST prEN ISO 4029:2025:2025 references and aligns with the following international standards to ensure consistency and interoperability:

  • ISO 225 – Symbols and descriptions of fastener dimensions
  • ISO 724 – General purpose metric screw threads
  • ISO 888 – Nominal lengths and thread lengths for fasteners
  • ISO 898-5 – Mechanical properties and hardness classes for set screws
  • ISO 3506-3 – Mechanical properties for corrosion-resistant stainless steel fasteners
  • ISO 4042 – Electroplated coating systems for fasteners
  • ISO 4759-1 – Tolerances for bolts, screws, and nuts - product grades
  • ISO 6157-1 – Surface discontinuities - inspection requirements
  • ISO 8991 and ISO 8992 – Fastener designation and general requirements
  • ISO 10683 – Zinc flake coating systems for fasteners

These referenced standards provide a comprehensive framework supporting the design, manufacture, inspection, and quality assurance of hexagon socket set screws with cup points.


Implementing oSIST prEN ISO 4029:2025:2025 facilitates international harmonization, improves product quality, enhances reliability, and supports regulatory compliance for hexagon socket set screws in diverse engineering fields. For manufacturers, distributors, and end-users, adherence to this standard ensures optimal performance and interchangeability of fasteners within metric systems.

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SIST EN ISO 4029:2026

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Frequently Asked Questions

SIST EN ISO 4029:2026 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Fasteners - Hexagon socket set screws with cup point (ISO 4029:2026)". This standard covers: This document specifies the characteristics of hexagon socket set screws with cup point, with metric coarse pitch threads M1,6 to M30 for steel and M1,6 to M24 for stainless steel, and with product grade A. Set screws are not intended for use under tensile load. If in certain cases other specifications are requested, hardness classes and stainless steel grades can be selected from ISO 898-5 or ISO 3506-3, and dimensional options from ISO 888, ISO 965-1 or ISO 4753.

This document specifies the characteristics of hexagon socket set screws with cup point, with metric coarse pitch threads M1,6 to M30 for steel and M1,6 to M24 for stainless steel, and with product grade A. Set screws are not intended for use under tensile load. If in certain cases other specifications are requested, hardness classes and stainless steel grades can be selected from ISO 898-5 or ISO 3506-3, and dimensional options from ISO 888, ISO 965-1 or ISO 4753.

SIST EN ISO 4029:2026 is classified under the following ICS (International Classification for Standards) categories: 21.060.10 - Bolts, screws, studs. The ICS classification helps identify the subject area and facilitates finding related standards.

SIST EN ISO 4029:2026 has the following relationships with other standards: It is inter standard links to SIST EN IEC 60079-0:2018, SIST EN ISO 4029:2004. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

SIST EN ISO 4029:2026 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)


SLOVENSKI STANDARD
01-maj-2026
Vezni element - Navojni zatiči z notranjim šestkotnikom in obročastim rezilom (ISO
4029:2026)
Fasteners - Hexagon socket set screws with cup point (ISO 4029:2026)
Verbindungselemente - Gewindestifte mit Innensechskant und Ringschneide (ISO
4029:2026)
Fixations - Vis sans tête à six pans creux, à bout cuvette (ISO 4029:2026)
Ta slovenski standard je istoveten z: EN ISO 4029:2026
ICS:
21.060.10 Sorniki, vijaki, stebelni vijaki Bolts, screws, studs
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 4029
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2026
EUROPÄISCHE NORM
ICS 21.060.10 Supersedes EN ISO 4029:2003
English Version
Fasteners - Hexagon socket set screws with cup point (ISO
4029:2026)
Fixations - Vis sans tête à six pans creux, à bout cuvette Verbindungselemente - Gewindestifte mit
(ISO 4029:2026) Innensechskant und Ringschneide (ISO 4029:2026)
This European Standard was approved by CEN on 8 August 2025.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 4029:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 4029:2026) has been prepared by Technical Committee ISO/TC 2 "Fasteners" in
collaboration with Technical Committee CEN/TC 185 “Fasteners” the secretariat of which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by August 2026, and conflicting national standards shall
be withdrawn at the latest by August 2026.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 4029:2003.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 4029:2026 has been approved by CEN as EN ISO 4029:2026 without any modification.

International
Standard
ISO 4029
Fourth edition
Fasteners — Hexagon socket set
2026-02
screws with cup point
Fixations — Vis sans tête à six pans creux, à bout cuvette
Reference number
ISO 4029:2026(en) © ISO 2026
ISO 4029:2026(en)
© ISO 2026
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 4029:2026(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Dimensions . 2
5 Requirements and reference International Standards . 5
6 Marking and labelling . 6
6.1 Marking on product . .6
6.2 Labelling on package .6
7 Designation . 6
Bibliography . 7

iii
ISO 4029:2026(en)
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.
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 editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 2, Fasteners, Subcommittee SC 11, Fasteners
with metric external thread, in collaboration with the European Committee for Standardization (CEN)
Technical Committee CEN/TC 185, Fasteners, in accordance with the Agreement on technical cooperation
between ISO and CEN (Vienna Agreement).
This fourth edition cancels and replaces the third editi
...

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