prEN ISO 8742

Fasteners - Grooved pins - One-third-length center grooves (ISO/DIS 8742:2023)

Verbindungselemente - Knebelkerbstifte mit kurzen Kerben (ISO/DIS 8742:2023)

Fixations - Goupilles cannelées - Cannelures centrales sur le tiers de la longueur (ISO/DIS 8742:2023)

La présente Norme internationale prescrit les caractéristiques des goupilles cannelées en acier ou en acier inoxydable austénitique, à trois cannelures centrales constantes sur le tiers de leur longueur, non débouchantes et régulièrement espacées, de diamètre nominal, d1, de 1,5 mm à 25 mm inclus. Le matériau refoulé de chaque côté des cannelures forme un renflement dont le diamètre d2, supérieur au diamètre nominal d1, permet un ajustement serré de ces goupilles cannelées lorsqu'elles sont emmanchées en force dans un trou de diamètre de perçage égal au diamètre nominal de la goupille d1 (voir article 4).

Vezni elementi - Zatiči z utori - Sredinski zatiči z utori dolžine ene tretjine celotnega zatiča (ISO/DIS 8742:2023)

General Information

• Status: Not Published
• Publication Date: 24-Jun-2025
• ICS: 21.060.50 - Pins, nails
• Technical Committee: CEN/TC 185 - Threaded and nonthreaded mechanical fasteners and accessories
• Drafting Committee: CEN/TC 185 - Threaded and nonthreaded mechanical fasteners and accessories
• Current Stage: 4098 - Decision to abandon - Enquiry
• Start Date: 12-Nov-2024
• Completion Date: 14-Apr-2025
• Ref Project: oSIST prEN ISO 8742:2024 - Fasteners - Grooved pins - One-third-length center grooves (ISO/DIS 8742:2023)

Relations

• Revises: EN ISO 8742:1997 - Grooved pins - One-third-length centre grooved (ISO 8742:1997)
• Effective Date: 18-Jan-2023

Overview

prEN ISO 8742 (ISO/DIS 8742:2023) is a CEN/ISO draft standard for fasteners - grooved pins with one‑third‑length center grooves. It specifies the characteristics, dimensions and marking requirements for grooved pins (closed groove ends) made of steel and stainless steel with nominal diameters from 1 mm to 25 mm. These pins are intended for positioning, guiding or allowing relative rotation of assembled parts and provide a medium level of pull‑out resistance due to their elastic fit.

Key topics and technical requirements

• Product scope: Grooved pins with centre grooves equal to one‑third of the pin length (closed ends), rounded ends by default (option CH for chamfered ends).
• Dimensions and tolerances: Detailed dimension tables (nominal diameters 1–25 mm) and tolerances for groove length and location. Groove location tolerance examples:
  • l ≤ 10 mm: position ±0.5 mm
  • 10 < l ≤ 50 mm: position ±1.0 mm
  • 50 < l ≤ 100 mm: position ±2.0 mm
  • 100 < l ≤ 200 mm: position ±4.0 mm
    Groove length tolerance (l/3) examples:
  • l ≤ 10 mm: l/3 ± 0.3 mm
  • 10 < l ≤ 50 mm: l/3 ± 0.6 mm
  • 50 < l ≤ 100 mm: l/3 ± 1.0 mm
  • 100 < l ≤ 200 mm: l/3 ± 1.5 mm
• Geometric features: Groove angle reference 70°; angle between two grooves 120° ±20°. The pin diameter d applies where grooves are absent.
• Functional controls: Control of expanded diameter (d) and pin straightness (t) are referenced to ISO 13669 (general grooved‑pin requirements).
• Materials and finishes: Steel and stainless steel (grades added such as A2, A4, C1, F1). Surface conditions and coatings referenced to ISO 4042, ISO 10683 and ISO 9717; mechanical properties per ISO 13669 and ISO 3506‑6 for stainless selection.
• Testing and inspection: References include shear tests (ISO 8749), Vickers hardness (ISO 6507‑1), and acceptance inspection (ISO 3269).
• Labelling and designation: Mandatory package labelling (standard reference, nominal diameter/length, material symbol, finish, lot number, quantity, manufacturer).

Applications and users

• Who uses it: Fastener manufacturers, mechanical designers, procurement teams, assembly engineers and quality/inspection personnel.
• Typical applications: Hinges, pivots, locating and guiding components in machinery, automotive assemblies, consumer products and industrial equipment where a symmetrical pin with medium pull‑out resistance and easy installation is required.

Related standards

• ISO 13669 - Fasteners: grooved pins general requirements
• ISO 3506‑6, ISO 4042, ISO 10683, ISO 9717 - material and coating guidance
• ISO 8749, ISO 6507‑1, ISO 3269, ISO 1891‑4 - testing, hardness, inspection and labelling

This draft standard (ISO/DIS 8742:2023) is part of ISO/CEN parallel processing and replaces earlier editions when published. Keywords: ISO 8742, grooved pins, fasteners, one‑third‑length center grooves, pin dimensions, pin tolerances, expanded diameter, pin straightness, stainless steel pins.

Standards Content (Sample)

SLOVENSKI STANDARD
01-februar-2024
Nadomešča:
SIST EN ISO 8742:2001
Vezni elementi - Zatiči z utori - Sredinski zatiči z utori dolžine ene tretjine
celotnega zatiča (ISO/DIS 8742:2023)
Fasteners - Grooved pins - One-third-length center grooves (ISO/DIS 8742:2023)
Verbindungselemente - Knebelkerbstifte mit kurzen Kerben (ISO/DIS 8742:2023)
Fixations - Goupilles cannelées - Cannelures centrales sur le tiers de la longueur
(ISO/DIS 8742:2023)
Ta slovenski standard je istoveten z: prEN ISO 8742
ICS:
21.060.50 Zatiči, žeblji Pins, nails
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT INTERNATIONAL STANDARD
ISO/DIS 8742
ISO/TC 2 Secretariat: DIN
Voting begins on: Voting terminates on:
2023-11-30 2024-02-22
Fasteners — Grooved pins — One-third-length center
grooves
Fixations — Goupilles cannelées — Cannelures centrales sur le tiers de la longueur
ICS: 21.060.50
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 8742:2023(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023

ISO/DIS 8742:2023(E)
DRAFT INTERNATIONAL STANDARD
ISO/DIS 8742
ISO/TC 2 Secretariat: DIN
Voting begins on: Voting terminates on:

Fasteners — Grooved pins — One-third-length center
grooves
Fixations — Goupilles cannelées — Cannelures centrales sur le tiers de la longueur
ICS: 21.060.50
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
© ISO 2023
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
NOT BE REFERRED TO AS AN INTERNATIONAL
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on STANDARD UNTIL PUBLISHED AS SUCH.
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
IN ADDITION TO THEIR EVALUATION AS
or ISO’s member body in the country of the requester. BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
ISO copyright office
USER PURPOSES, DRAFT INTERNATIONAL
CP 401 • Ch. de Blandonnet 8
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
CH-1214 Vernier, Geneva
POTENTIAL TO BECOME STANDARDS TO
Phone: [phone]
WHICH REFERENCE MAY BE MADE IN
Reference number
Email: [e-mail]
NATIONAL REGULATIONS.
Website: www.iso.org ISO/DIS 8742:2023(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
Published in Switzerland
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
ii
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023

ISO/DIS 8742:2023(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principles of grooved pins and assembly . 2
5 Dimensions .2
6 Requirements and reference International Standards . 5
7 Labelling on package .6
8 Designation . 6
Bibliography . 8
iii
ISO/DIS 8742:2023(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 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).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on 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 the following
URL: www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 2, Fasteners and by Technical Committee
CEN/TC 185, Fasteners in collaboration.
This third edition cancels and replaces the second edition (ISO 8742:1997) which has been technically
revised.
The main changes are as follows:
— terms and definitions, principles for grooved pins and assembly (including hole dimensions), control
of the expanded diameter d and pin straightness, mechanical and physical properties (including
shear resistance and hardness) and inspection which are common for all grooved pins (product
standards ISO 8742 to ISO 8747, ISO 13670 and ISO 13672) have been specified in the new reference
standard ISO 13669, general requirements;
— non-preferred diameters 1 mm, 3,5 mm, 7 mm, 9 mm, 14 mm and 18 mm have been added;
— values of expanded diameter d for steel pins have been slightly increased for the shortest length
range, and have been added for stainless steel pins;
— tolerances for the rounded end and values for the chamfered end have been added;
— tolerances for the length of the grooves and their location have been added;
— stainless steel grades A2, A4, C1 and F1 have been added;
— other materials (such as hardened steels, brass, aluminium) are by agreement (see Table 3);
— specifications for labelling have been added as Clause 8.
Any feedback or questions on this document should be directed to the user's national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
DRAFT INTERNATIONAL STANDARD ISO/DIS 8742:2023(E)
Fasteners — Grooved pins — One-third-length center
grooves
1 Scope
This document specifies the characteristics of grooved pins with one-third-length center grooves (with
closed ends), in steel and stainless steel, and with nominal diameter 1 mm to 25 mm.
These grooved pins are designed to fulfil the main following functions:
— relative rotation of the assembled parts, and
— positioning or guiding,
with an easy installation (due to its symmetrical shape) and a medium level of pull-out resistance (due
to the elastic fit behavior of the pin).
The general requirements (including functional principles for grooved pins and assembly) are specified
in ISO 13669.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
1)
ISO 13669 , Fasteners — Grooved pins — General requirements
ISO 1891-4, Fasteners — Vocabulary — Part 4: Control, inspection, delivery, acceptance and quality
ISO 3269, Fasteners — Acceptance inspection
ISO 3506-6, Fasteners — Mechanical properties of c
...