Fasteners - Button head screws with reduced loadability - Part 1: Hexagon socket button head screws (ISO 7380-1:2022)

This document specifies the characteristics of hexagon socket button head screws with reduced loadability due to head design, in steel and stainless steel, with metric coarse pitch threads M3 to M16, and with product grade A.
If, in certain cases, other specifications are requested, stainless steel grades can be selected from ISO 3506-1, and the dimensional options from ISO 888 or ISO 4753.
NOTE      The reduced loadability (related to the head dimensions in combination with penetration of the hexagon socket specified in this document) implies a limitation of ultimate tensile load shown by a specific marking (property class preceded by a zero). The loadability in the head is assumed to be 80 % of that in the thread for all sizes and all property classes, see Table 4.

Mechanische Verbindungselemente - Schrauben mit abgeflachtem Halbrundkopf mit reduzierter Belastbarkeit - Teil 1: Schrauben mit abgeflachtem Halbrundkopf mit Innensechskant (ISO 7380-1:2022)

Dieses Dokument legt die Eigenschaften von Schrauben mit abgeflachtem Halbrundkopf mit Innensechskant mit aufgrund der Auslegung des Kopfes reduzierter Belastbarkeit mit metrischen Regelgewinden M3 bis M16 in Produktklasse A fest.
ANMERKUNG Die reduzierte Belastbarkeit (bezogen auf die Kopfgeometrie in Kombination mit der in diesem Dokument festgelegten Eindringtiefe des Innensechskantes) bringt eine Begrenzung der Mindestbruchkraft mit sich. Es wird angenommen, dass die Belastbarkeit im Kopf 80 % der Belastbarkeit im Gewinde für alle Größen und alle Festigkeitsklassen beträgt, siehe Tabelle 3.
Falls in bestimmten Fällen andere Festlegungen benötigt werden, können Stahlsorten für nichtrostende Stähle aus ISO 3506-1 und Maßangaben aus ISO 888 oder ISO 4753 entnommen werden.

Fixations - Vis à tête cylindrique bombée plate à capacité de charge réduite - Partie 1: Tête cylindrique bombée plate à six pans creux (ISO 7380-1:2022)

Le présent document spécifie les caractéristiques des vis à tête cylindrique bombée plate à six pans creux, à capacité de charge réduite du fait de la conception de la tête, en acier et en acier inoxydable, à filetage métrique à pas gros M3 à M16, et de grade A.
Si dans certains cas d’autres spécifications sont requises, les grades d’acier inoxydable peuvent être choisis dans l'ISO 3506‑1, et les options dimensionnelles dans l'ISO 888 ou l'ISO 4753.
NOTE         La capacité de charge réduite (du fait des dimensions de la tête et de la profondeur de pénétration du six pans creux spécifiées dans le présent document) implique une limitation de la charge de rupture à la traction, indiquée par un marquage spécifique (classe de qualité précédée d’un zéro). La capacité de charge dans la tête est considérée comme égale à 80 % de la résistance du filetage pour toutes les dimensions et pour toutes les classes de qualité, voir Tableau 4.

Vezni elementi - Vijaki s sploščeno polkrožno glavo z manjšo obremenljivostjo - 1. del: Sploščena polkrožna glava z notranjim šestkotnikom (ISO/FDIS 7380-1:2022)

General Information

Status
Published
Publication Date
10-Jan-2023
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
20-Jun-2023
Completion Date
11-Jan-2023

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SLOVENSKI STANDARD
oSIST prEN ISO 7380-1:2022
01-januar-2022

Vezni elementi - Vijaki s sploščeno polkrožno glavo z manjšo obremenljivostjo - 1.

del: Sploščena polkrožna glava z notranjim šestkotnikom (ISO/DIS 7380-1:2021)

Fasteners - Button head screws with reduced loadability - Part 1: Hexagon socket button

head screws (ISO/DIS 7380-1:2021)
Mechanische Verbindungselemente - Schrauben mit abgeflachtem Halbrundkopf mit
reduzierter Belastbarkeit - Teil 1: Schrauben mit abgeflachtem Halbrundkopf mit
Innensechskant (ISO/DIS 7380-1:2021)

Fixations - Vis à tête cylindrique bombée plate à capacité de charge réduite - Partie 1:

Tête cylindrique bombée plate à six pans creux (ISO/DIS 7380-1:2021)
Ta slovenski standard je istoveten z: prEN ISO 7380-1
ICS:
21.060.10 Sorniki, vijaki, stebelni vijaki Bolts, screws, studs
oSIST prEN ISO 7380-1:2022 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 7380-1:2022
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oSIST prEN ISO 7380-1:2022
DRAFT INTERNATIONAL STANDARD
ISO/DIS 7380-1
ISO/TC 2/SC 11 Secretariat: DIN
Voting begins on: Voting terminates on:
2021-11-15 2022-02-07
Fasteners — Button head screws with reduced
loadability —
Part 1:
Hexagon socket button head screws
Partie 1: Tête cylindrique bombée plate à six pans creux
ICS: 21.060.10
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.
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STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
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WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 7380-1:2021(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 2021
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oSIST prEN ISO 7380-1:2022
ISO/DIS 7380-1:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021

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

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Published in Switzerland
© ISO 2021 – All rights reserved
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oSIST prEN ISO 7380-1:2022
ISO/DIS 7380-1:2021(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ..................................................................................................................................................................................... 1

3 Terms and definitions .................................................................................................................................................................................... 2

4 Dimensions ................................................................................................................................................................................................................2

5 Requirements and reference International Standards .............................................................................................. 5

6 Marking and labelling .................................................................................................................................................................................... 7

6.1 Marking on product ........................................................................................................................................... ................................. 7

6.2 Labelling on package ......................................................................................................................................................................... 7

7 Designation ................................................................................................................................................................................................................ 8

Bibliography ................................................................................................................................................................................................................................ 9

iii
© ISO 2021 – All rights reserved
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oSIST prEN ISO 7380-1:2022
ISO/DIS 7380-1:2021(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 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.

This second edition cancels and replaces the first edition (ISO 7380-1:2011), which has been technically

revised.
The main changes compared to the previous edition are as follows:

— the whole standard including title has been improved to clearly point out that these hexagon socket

button head screws have reduced loadability because of their head design (head dimensions and

penetration of the hexagon socket);

— the reference thread length b has been increased to 3d for partially threaded screws M16, so that

these screws can be tensile tested in accordance with ISO 3506-1 (b ≥ 3d is required to tensile test

screws with reduced loadability);

— the reference datum for the outer diameter of the bearing face has been specified in accordance

with other relevant product standards (see Figure 1), and the minimum values have been reduced

to d = d × 0,92 considering the manufacturing aspects for “button head” (see Table 1);

w,min k,min
— e values have been rounded to two decimal places (see Table 1);
min
— the maximum depth of the hexagon socket t has been added (see Table 1);
max

— the new symbol w has been introduced in Figure 2 and Table 1 instead of the symbol w in order

to define the wall thickness between the bottom of the cylindrical hole (broached hole) and the

bearing face.

— the definition of r in Figure 1 has been changed to allow the offset of the centre of the radius from

the thread axis;

— the rules for the smallest and greatest standardized nominal lengths have been added (see Table 2);

© ISO 2021 – All rights reserved
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oSIST prEN ISO 7380-1:2022
ISO/DIS 7380-1:2021(E)

— the minimum ultimate tensile loads were recalculated and have been changed to more precise

values for M3 (property classes 10.9 and 70), M4 (property class 70), M5 (property classes 8.8, 70

and 80), M6 (property classes 10.9 and 70), M8 (property class 70), M10 (property classes 10.9 and

70), M12 (property classes 8.8 and 80) and M16 (property classes 8.8, 70 and 80), see Table 4;

— property class 12.9/12.9 has been excluded for the screws with reduced loadability, and stainless

steel grades A3 and A5 have been deleted from default stainless steel grades in Table 3;

— a new Clause 6, Marking and labelling, has been added.
A list of all parts in the ISO 7380 series can be found on the ISO website.

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.
© ISO 2021 – All rights reserved
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oSIST prEN ISO 7380-1:2022
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oSIST prEN ISO 7380-1:2022
DRAFT INTERNATIONAL STANDARD ISO/DIS 7380-1:2021(E)
Fasteners — Button head screws with reduced
loadability —
Part 1:
Hexagon socket button head screws
1 Scope

This document specifies the characteristics of hexagon socket button head screws with reduced

loadability due to head design with metric coarse pitch threads M3 to M16, and with product grade A.

NOTE The reduced loadability (related to the head dimensions in combination with penetration of the

hexagon socket specified in this document) implies a limitation of ultimate tensile load. The loadability in the

head is assumed to be 80% of that in the thread for all sizes and all property classes, see Table 3.

If, in certain cases, other specifications are requested, stainless steel grades can be selected from

ISO 3506-1, and the dimensional options from ISO 888 or ISO 4753.
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

...

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