SIST EN ISO 10642:2020
(Main)Fasteners - Hexagon socket countersunk head screws with reduced loadability (ISO 10642:2019)
Fasteners - Hexagon socket countersunk head screws with reduced loadability (ISO 10642:2019)
This Standard specifies the characteristics of hexagon socket countersunk head screws with reduced loadability due to head design, in steel and stainless steel, with metric coarse pitch threads M2 to M20, and with product grade A.
Mechanische Verbindungselemente - Senkschrauben mit Innensechskant mit reduzierter Belastbarkeit (ISO 10642:2019)
Dieses Dokument legt die Eigenschaften von Senkschrauben mit Innensechskant mit reduzierter Belastbarkeit aufgrund der Auslegung des Kopfes, aus Stahl und Edelstahl, mit metrischen Regelgewinden M2 bis M20 in Produktklasse A fest.
ANMERKUNG 1 Andere Möglichkeiten für Maße sind in ISO 888, ISO 965 1 und ISO 4753 angegeben.
ANMERKUNG 2 Die reduzierte Belastbarkeit (bezogen auf die Maße der Senkköpfe in Kombination mit der in diesem Dokument festgelegten Eindringtiefe des Innensechskantes) zieht eine Begrenzung der Mindestbruchkraft nach sich; siehe Tabelle 5.
ANMERKUNG 3 Besondere Aufmerksamkeit ist erforderlich, um ein Fluchten des Senkkopfes mit der Auflagefläche der Ansenkung in der Baugruppe sicherzustellen.
Fixations - Vis à tête fraisée à six pans creux à capacité de charge réduite (ISO 10642:2019)
Le présent document spécifie les caractéristiques des vis à tête fraisée 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 de M2 à M20, et de grade A.
NOTE 1 D'autres options de dimensions sont données dans l'ISO 888, l'ISO 965-1 et l'ISO 4753.
NOTE 2 La capacité de charge réduite (du fait des dimensions de la tête fraisée combinées avec la pénétration de l'empreinte six pans creux spécifiée dans le présent document) implique une limitation de la charge minimale de rupture à la traction; voir Tableau 5.
NOTE 3 Une attention toute particulière est nécessaire pour assurer l'alignement de la tête fraisée avec la fraisure de la surface d'appui au niveau de l'assemblage.
Vezni elementi - Vijaki z ugrezno glavo in notranjim šestkotnikom (imbus) z manjšo obremenljivostjo (ISO 10642:2019)
Ta standard določa značilnosti vijakov z ugrezno glavo in notranjim šestkotnikom (imbus) z manjšo obremenljivostjo zaradi zasnove glave, v jeklu in nerjavnem jeklu, z grobim metričnim navojem ISO velikosti od M2 do M20, in razredom izdelave A.
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 10642:2020
01-januar-2020
Nadomešča:
SIST EN ISO 10642:2004
SIST EN ISO 10642:2004/A1:2013
Vezni elementi - Vijaki z ugrezno glavo in notranjim šestkotnikom (imbus) z
manjšo obremenljivostjo (ISO 10642:2019)
Fasteners - Hexagon socket countersunk head screws with reduced loadability (ISO
10642:2019)
Mechanische Verbindungselemente - Senkschrauben mit Innensechskant mit reduzierter
Belastbarkeit (ISO 10642:2019)
Fixations - Vis à tête fraisée à six pans creux à capacité de charge réduite (ISO
10642:2019)
Ta slovenski standard je istoveten z: EN ISO 10642:2019
ICS:
21.060.10 Sorniki, vijaki, stebelni vijaki Bolts, screws, studs
SIST EN ISO 10642:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 10642:2020
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SIST EN ISO 10642:2020
EN ISO 10642
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2019
EUROPÄISCHE NORM
ICS 21.060.10 Supersedes EN ISO 10642:2004
English Version
Fasteners - Hexagon socket countersunk head screws with
reduced loadability (ISO 10642:2019)
Fixations - Vis à tête fraisée à six pans creux à capacité Mechanische Verbindungselemente - Senkschrauben
de charge réduite (ISO 10642:2019) mit Innensechskant mit reduzierter Belastbarkeit (ISO
10642:2019)
This European Standard was approved by CEN on 17 August 2019.
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, Turkey 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
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 10642:2019 E
worldwide for CEN national Members.
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SIST EN ISO 10642:2020
EN ISO 10642:2019 (E)
Contents Page
European foreword . 3
2
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SIST EN ISO 10642:2020
EN ISO 10642:2019 (E)
European foreword
This document (EN ISO 10642:2019) 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 April 2020, and conflicting national standards shall be
withdrawn at the latest by April 2020.
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 10642:2004.
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, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 10642:2019 has been approved by CEN as EN ISO 10642:2019 without any modification.
3
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SIST EN ISO 10642:2020
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SIST EN ISO 10642:2020
INTERNATIONAL ISO
STANDARD 10642
Third edition
2019-09
Fasteners — Hexagon socket
countersunk head screws with
reduced loadability
Fixations — Vis à tête fraisée à six pans creux à capacité de charge
réduite
Reference number
ISO 10642:2019(E)
©
ISO 2019
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SIST EN ISO 10642:2020
ISO 10642:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019
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
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
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SIST EN ISO 10642:2020
ISO 10642:2019(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Dimensions and gauging of head . 2
4.1 Dimensions . 2
4.2 Gauging of head . 6
5 Requirements and reference International Standards . 7
6 Marking and labelling . 8
6.1 Marking on product . 8
6.2 Labelling on package . 8
7 Designation . 9
Annex A (informative) Minimum ultimate tensile loads for bolts and screws with full
loadability, coarse pitch threads M2 and M2,5 .10
Bibliography .11
© ISO 2019 – All rights reserved iii
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SIST EN ISO 10642:2020
ISO 10642:2019(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 third edition cancels and replaces the second edition (ISO 10642:2004), which has been technically
revised. It also incorporates the Amendment ISO 10642:2004/Amd.1:2012. The main changes compared
to the previous edition are as follows:
— the whole standard has been improved to clearly point out that these hexagon socket countersunk
head screws have reduced loadability because of their head design (head dimensions and penetration
of the hexagon socket);
— screws made of stainless steel have been added;
— detailed head configuration has been added (see Figure 4);
— M2 and M2,5 have been added; as their minimum ultimate tensile loads for full loadability are not
specified in ISO 898-1 and ISO 3506-1, they have been calculated with the same formulae accordingly
(see Annex A);
— the reference threaded length b has been increased to 3d for partially threaded screws M14 to M20,
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);
— head height k has been added as reference dimension in Tables 1 and 2;
min
— wall thickness between driving feature and bearing face w has been replaced by the depth of the
min
internal driving feature t (same method as for hexalobular internal drive);
max
— D , D and F are pointed out as gauge dimensions in Table 3 (see also Figure 5);
a k
— the minimum nominal lengths of the standardized range have been determined in accordance with
footnote g of Tables 1 and 2 and therefore the shorter lengths for M4 to M20 were deleted.
iv © ISO 2019 – All rights reserved
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SIST EN ISO 10642:2020
ISO 10642:2019(E)
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 2019 – All rights reserved v
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SIST EN ISO 10642:2020
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SIST EN ISO 10642:2020
INTERNATIONAL STANDARD ISO 10642:2019(E)
Fasteners — Hexagon socket countersunk head screws
with reduced loadability
1 Scope
This document specifies the characteristics of hexagon socket countersunk head screws with reduced
loadability due to head design, in steel and stainless steel, with metric coarse pitch threads M2 to M20,
and with product grade A.
NOTE 1 Other dimensional options are given in ISO 888, ISO 965-1 and ISO 4753.
NOTE 2 The reduced loadability (related to the countersunk head dimensions in combination with penetration
of the hexagon socket specified in this document) implies a limitation of ultimate tensile load; see Table 5.
NOTE 3 Particular attention is needed to ensure alignment of the countersunk head with the bearing surface
of the countersink in the assembly.
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.
ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel — Part 1: Bolts, screws
and studs with specified property classes — Coarse thread and fine pitch thread
ISO 965-1, ISO general purpose metric screw threads — Toleranc
...
SLOVENSKI STANDARD
oSIST prEN ISO 10642:2018
01-julij-2018
Vezni elementi - Vijaki z ugrezno glavo in notranjim šestkotnikom (imbus) z
manjšo obremenljivostjo (ISO/DIS 10642:2018)
Fasteners - Hexagon socket countersunk head screws with reduced loadability (ISO/DIS
10642:2018)
Mechanische Verbindungselemente - Senkschrauben mit Innensechskant mit reduzierter
Belastbarkeit (ISO/DIS 10642:2018)
Fixations - Vis à tête fraisée à six pans creux à capacité de charge réduite (ISO/DIS
10642:2018)
Ta slovenski standard je istoveten z: prEN ISO 10642
ICS:
21.060.10 Sorniki, vijaki, stebelni vijaki Bolts, screws, studs
oSIST prEN ISO 10642:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN ISO 10642:2018
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oSIST prEN ISO 10642:2018
DRAFT INTERNATIONAL STANDARD
ISO/DIS 10642
ISO/TC 2/SC 11 Secretariat: DIN
Voting begins on: Voting terminates on:
2018-04-23 2018-07-16
Fasteners — Hexagon socket countersunk head screws
with reduced loadability
Fixations — Vis à tête fraisée à six pans creux à capacité de charge réduite
ICS: 21.060.10
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
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 10642:2018(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 2018
---------------------- Page: 3 ----------------------
oSIST prEN ISO 10642:2018
ISO/DIS 10642:2018(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2018
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
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved
---------------------- Page: 4 ----------------------
oSIST prEN ISO 10642:2018
ISO/DIS 10642:2018(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International
Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies
casting a vote.
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.
ISO 10642 was prepared by Technical Committee ISO/TC 2, Fasteners, Subcommittee SC 11, Fasteners
with metric external thread, and by Technical Committee CEN/TC 185, Fasteners in collaboration.
This third edition cancels and replaces the second edition (ISO 10642:2004 including
ISO 10642:2004/Amd.1:2012), which has been technically revised. The main changes compared to the
previous version are as follows:
– the whole standard was improved to clearly point out that these hexagon socket countersunk head
screws have reduced loadability because of their head design (head dimensions and penetration of
the hexagon socket);
– the minimum tensile loads were recalculated by taking into account the most critical dimensions (in
the worst dimensional conditions, the calculated values for proof loads fall below 80% of the
minimum ultimate tensile load specified for full loadability in ISO 898-1 and ISO 3506-1); however,
when these screws are not manufactured to minimum head dimensions in combination with a
maximum penetration depth, tensile strength will be higher;
– detailed head configuration was added (see Figure 4);
– M2 and M2,5 were added, their minimum ultimate tensile loads for full loadability are not specified
in ISO 898-1 and ISO 3506-1, but calculated with the same formulae accordingly (see Annex A);
– the reference threaded length b was increased to 3d for partially threaded screws M14 to M20, 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);
– head height k was added as reference dimension in Table 1;
min
© ISO 2018 – All rights reserved
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oSIST prEN ISO 10642:2018
ISO/DIS 10642:2018(E)
– the wall thickness between driving feature and bearing face w was replaced by the depth of the
min
internal driving feature t (same method as for hexalobular internal drive);
max
– D , D and F were pointed out as gauge dimensions in Table 1 (see also Figure 5);
a k
– the minimum nominal lengths of the standardised range were determined in accordance with
footnote g of Table 1 and therefore the shorter lengths for M4 to M20 were deleted;
– the standard was editorially revised.
© ISO 2018 – All rights reserved
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oSIST prEN ISO 10642:2018
ISO/DIS 10642:2018(E)
Fasteners — Hexagon socket countersunk head screws with
reduced loadability
1 Scope
This International Standard specifies the characteristics of hexagon socket countersunk head screws
with reduced loadability due to head design, in steel and stainless steel, with metric coarse pitch
threads M2 to M20, and with product grade A.
NOTE The reduced loadability (related to the countersunk head dimensions in combination with penetration
of the hexagon socket specified in this standard) implies a limitation of ultimate tensile load, see Table 3.
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.
ISO 225, Fasteners — Bolts, screws, studs and nuts — Symbols and descriptions of dimensions
ISO 888, Fasteners — Bolts, screws and studs — Nominal lengths and thread lengths
ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel — Part 1: Bolts, screws
and studs with specified property classes — Coarse thread and fine pitch thread
ISO 965-1, ISO general purpose metric screw threads — Tolerances — Part 1: Principles and basic data
ISO 3269, Fasteners — Acceptance inspection
ISO 3506-1, Mechanical properties of corrosion-resistant stainless-steel fasteners — Part 1: Bolts, screws
and studs
ISO 4042, Fasteners — Electroplated coatings
ISO 4753, Fasteners — Ends of parts with external ISO metric thread
ISO 4759-1, Tolerances for fasteners — Part 1: Bolts, screws, studs and nuts — Product grades A, B and C
ISO 6157-1, Fasteners — Surface discontinuities — Part 1: Bolts, screws and studs for general
requirements
ISO 6157-3, Fasteners — Surface discontinuities — Part 3: Bolts, screws and studs for special
requirements
ISO 8992, Fasteners — General requirements for bolts, screws, studs and nuts
ISO 10683, Fasteners — Non-electrolytically applied zinc flake coatings
ISO 16048, Passivation of corrosion-resistant stainless-steel fasteners
© ISO 2018 – All rights reserved
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oSIST prEN ISO 10642:2018
ISO/DIS 10642:2018(E)
3 Dimensions and gauging of head
3.1 Dimensions
Dimensions shall be in accordance with Figures 1 to 4 and Table 1.
Symbols and descriptions of dimensions are defined in ISO 225.
a) Partially threaded screw
b) Screw threaded to the head
a
A slight rounding or countersink at the mouth of the socket is permissible.
b
In accordance with ISO 4753, chamfered end or, for sizes ≤ M4, as-rolled end.
c
Edge of the head flat or rounded.
d
Incomplete thread u ≤ 2P.
e
d applies when values for l are specified in Table 1.
s s,min
f
a ≤ 2P.
Figure 1 — Hexagon socket countersunk head screws
© ISO 2018 – All rights reserved
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oSIST prEN ISO 10642:2018
ISO/DIS 10642:2018(E)
Figure 2 — Permissible alternative form of socket
For broached sockets which are at the maximum limit of size the overcut resulting from drilling shall
not exceed 1/3 of the length of any flat of the socket which is e/2 (see Figure 3).
Figure 3 — Detail: Broached socket
Figure 4 — Countersunk head configuration
© ISO 2018 – All rights reserved
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oSIST prEN ISO 10642:2018
ISO/DIS 10642:2018(E)
3.2 Gauging of head
For gauging of the head and for dimensions of the gauge allowing the control of the head dimensions
see Figure 5 and Table 1. The top surface of the screw shall be located between the gauge surfaces A and
B.
NOTE For more information about calculation basis for gauge dimensions, see ISO 7721.
Tolerances in millimetres
Key
D Gauge inner diameter related to the screw bearing surface
a
F flushness of the gauge
A gauge maximum condition
B gauge minimum condition
a
Dk = d (see Table 1)
k,theor,max
Figure 5 — Flushness gauge
© ISO 2018 – All rights reserved
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