prEN ISO 8741
(Main)Fasteners - Reverse-taper grooved pins - Half-length progressive grooves (ISO/DIS 8741:2023)
Fasteners - Reverse-taper grooved pins - Half-length progressive grooves (ISO/DIS 8741:2023)
Verbindungselemente - Steckkerbstifte (ISO/DIS 8741:2023)
Fixations - Goupilles cannelées inversées - Cannelures progressives sur la moitié de la longueur (ISO/DIS 8741:2023)
La présente Norme internationale prescrit les caractéristiques des goupilles cannelées en acier ou en acier inoxydable austénitique, à trois cannelures progressives renversées sur la moitié 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 s povratnimi utori - Postopni utori polovične dolžine (ISO/DIS 8741:2023)
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Standards Content (Sample)
SLOVENSKI STANDARD
01-februar-2024
Nadomešča:
SIST EN ISO 8741:2001
Vezni elementi - Zatiči s povratnimi utori - Postopni utori polovične dolžine
(ISO/DIS 8741:2023)
Fasteners - Reverse-taper grooved pins - Half-length progressive grooves (ISO/DIS
8741:2023)
Verbindungselemente - Steckkerbstifte (ISO/DIS 8741:2023)
Fixations - Goupilles cannelées inversées - Cannelures progressives sur la moitié de la
longueur (ISO/DIS 8741:2023)
Ta slovenski standard je istoveten z: prEN ISO 8741
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 8741
ISO/TC 2 Secretariat: DIN
Voting begins on: Voting terminates on:
2023-11-30 2024-02-22
Fasteners — Reverse-taper grooved pins — Half-length
progressive grooves
Fixations — Goupilles cannelées inversées — Cannelures progressives sur la moitié 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
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Reference number
NATIONAL REGULATIONS.
ISO/DIS 8741:2023(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 8741:2023(E)
DRAFT INTERNATIONAL STANDARD
ISO/DIS 8741
ISO/TC 2 Secretariat: DIN
Voting begins on: Voting terminates on:
Fasteners — Reverse-taper grooved pins — Half-length
progressive grooves
Fixations — Goupilles cannelées inversées — Cannelures progressives sur la moitié 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.
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NATIONAL REGULATIONS.
Website: www.iso.org ISO/DIS 8741:2023(E)
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ii
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023
ISO/DIS 8741:2023(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle of grooved pins and assembly . 2
5 Dimensions .2
6 Requirements and reference International Standards . 5
7 Labelling on package .6
8 Designation . 7
Bibliography . 8
iii
ISO/DIS 8741:2023(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 8741:1997), 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 8739 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 8741:2023(E)
Fasteners — Reverse-taper grooved pins — Half-length
progressive grooves
1 Scope
This document specifies the characteristics of reverse-taper grooved pins with half-length progressive
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:
— positioning or guiding, and
— relative rotation of the assembled parts,
with an easy installation (due to its shape) and a medium level of pull-out resistance (due to the elastic
fit behaviour 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 corrosion-resistant stainless steel fasteners — Part 6:
General rules for the selection of stainless steels and nickel alloys for fasteners
ISO 4042, Fasteners — Electroplated coating systems
ISO 6507-1, Metallic materials — Vickers hardness test — Part 1: Test method
ISO 8749, Pins and grooved pins — Shear test
ISO 9717, Metallic and other inorganic coatings — Phosphate conversion coating of metals
ISO 10683, Fasteners — Non-electrolytically applied zinc flake coating systems
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 13669 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
1) Currently at DIS stage.
ISO/DIS 8741:2023(E)
4 Principle of grooved pins and assembly
The principles of grooved pins and assembly specified in ISO 13669 shall apply.
5 Dimensions
Dimensions shall be in accordance with Figure 1 and with Tables 1 and 2. The control of the expanded
diameter d and pin straightness t shall be as specified in ISO 13669.
For coated pins, dimensions and tolerances shall apply prior to coating.
Unless otherwise agreed at the time of the order, the pins are manufactured with rounded ends.
a) Pin with rounded ends (RN)
b) Option: pin with chamfered ends (CH)
Key
1 insertion side
a
The pin diameter d is only applicable in areas where grooves are not present.
b
The angle of 120° between two grooves shall apply with a tolerance of ±20°.
c
The groove angle of 70° is a reference dimension, see ISO 13669.
Figure 1 — Reverse-taper grooved pin with half-length progressive groves
ISO/DIS 8741:2023(E)
In accordance with Figure 1, the start of the grooves shall not get into the rounded or chamfered end but
shall remain closed, and shall be positioned at l max. from the rounded or chamfered end as follows:
e
— l ≤ 10 mm l max. = 1 mm
e
— 10 mm < l ≤ 50 mm l max. = 2 mm
e
— 50 mm < l ≤ 100 mm l max. = 3 mm
e
— 100 mm < l ≤ 200 mm l max. = 4 mm
e
In accordance with Figure 1, the length of the grooves shall be equal to l/2 with the following tolerance:
— l ≤ 10 mm l/2 ± 0,3 mm
— 10 mm < l ≤ 50 mm l/2 ± 0,6 mm
— 50 mm < l ≤ 100 mm l/2 ± 1,0 mm
— 100 mm < l ≤ 200 mm l/2 ± 1,5 mm
Table 1 — Dimensions for sizes 1 to 7 mm
Dimensions in millimetres
Nominal di-
(1) 1,5 2 2,5 3 (3,5) 4 5 6 (7)
ameter, d
max. 1,000 1,500 2,000 2,500 3,000 3,500 4,000 5,000 6,000 7,000
d
min. 0,975 1,475 1,975 2,475 2,975 3,425 3,925 4,925 5,925 6,910
nom. 0,13 0,20 0,27 0,34 0,40 0,47 0,54 0,67 0,80 0,94
a max. 0,23 0,35 0,42 0,49 0,55 0,67 0,74 0,87 1,00 1,19
min. 0,03 0,05 0,12 0,19 0,25 0,27 0,34 0,47 0,60 0,69
nom. 0,20 0,30 0,35 0,40 0,50 0,55 0,65 0,80 1,20 1,40
a
c max. 0,35 0,50 0,55 0,60 0,70 0,80 0,90 1,05 1,45 1,70
min. 0,05 0,10 0,15 0,20 0,30 0,30 0,40 0,55 0,95 1,10
r ref. ≈ d
b
Expanded diameter, d
Length, l
l
+00, 5
nom.
±0,05
nom. tol.
Sizes shown in brackets are non-preferred dimensions.
The range of standard lengths are specified between the stepped bold lines (white area).
a
Chamfered end only upon specific request at the time of the order.
b
Within a defined range, the first value for d is specified for steel pins and the second value in square brackets for
stainless steel pins.
ISO/DIS 8741:2023(E)
TTabablele 1 1 ((ccoonnttiinnueuedd))
6 6
1,10
8 ±0,25 8
1,63
[1,075]
[1,600]
10 10
2,15 3,20
12 12
[2,1
...
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