EN ISO 6149-2:2007

SLOVENSKI STANDARD
01-maj-2007
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Connections for hydraulic fluid power and general use - Ports and stud ends with ISO
261 metric threads and O-ring sealing - Part 2: Dimensions, design, test methods and
requirements for heavy-duty (S series) stud ends (ISO 6149-2:2006)
Leitungsanschlüsse für Fluidtechnik und allgemeine Anwendung - Einschraublöcher und
Einschraubzapfen mit metrischem Gewinde nach ISO 261 und O-Ring-Abdichtung - Teil
2: Maße, Konstruktion, Prüfverfahren und Anforderungen für Einschraubzapfen, schwere
Reihe (S-Reihe) (ISO 6149-2:2006)
Raccordements pour transmissions hydrauliques et applications générales - Orifices et
éléments mâles a filetage métrique ISO 261 et joint torique - Partie 2: Dimensions,
conception, méthodes d'essai et exigences des éléments mâles de série lourde (série S)
(ISO 6149-2:2006)
Ta slovenski standard je istoveten z: EN ISO 6149-2:2007
ICS:
23.100.40 Cevna napeljava in sklopke Piping and couplings
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 6149-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2007
ICS 23.100.40
English Version
Connections for hydraulic fluid power and general use - Ports
and stud ends with ISO 261 metric threads and O-ring sealing -
Part 2: Dimensions, design, test methods and requirements for
heavy-duty (S series) stud ends (ISO 6149-2:2006)
Raccordements pour transmissions hydrauliques et Leitungsanschlüsse für Fluidtechnik und allgemeine
applications générales - Orifices et éléments mâles à Anwendung - Einschraublöcher und Einschraubzapfen mit
filetage métrique ISO 261 et joint torique - Partie 2: metrischem Gewinde nach ISO 261 und O-Ring-
Dimensions, conception, méthodes d'essai et exigences Abdichtung - Teil 2: Maße, Konstruktion, Prüfverfahren und
des éléments mâles de série lourde (série S) (ISO 6149- Anforderungen für Einschraubzapfen, schwere Reihe (S-
2:2006) Reihe) (ISO 6149-2:2006)
This European Standard was approved by CEN on 4 February 2007.
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 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 6149-2:2007: E
worldwide for CEN national Members.

Foreword
The text of ISO 6149-2:2006 has been prepared by Technical Committee ISO/TC 131 "Fluid
power systems” of the International Organization for Standardization (ISO) and has been taken
over as EN ISO 6149-2:2007 by Technical Committee ECISS/TC 29 "Steel tubes and fittings for
steel tubes", the secretariat of which is held by UNI.

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 2007, and conflicting national
standards shall be withdrawn at the latest by August 2007.

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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United
Kingdom.
Endorsement notice
The text of ISO 6149-2:2006 has been approved by CEN as EN ISO 6149-2:2007 without any
modifications.
INTERNATIONAL ISO
STANDARD 6149-2
Second edition
2006-02-15
Connections for hydraulic fluid power
and general use — Ports and stud ends
with ISO 261 metric threads and O-ring
sealing —
Part 2:
Dimensions, design, test methods and
requirements for heavy-duty (S series)
stud ends
Raccordements pour transmissions hydrauliques et applications
générales — Orifices et éléments mâles à filetage métrique ISO 261 et
joint torique —
Partie 2: Dimensions, conception, méthodes d'essai et exigences des
éléments mâles de série lourde (série S)

Reference number
ISO 6149-2:2006(E)
©
ISO 2006
ISO 6149-2:2006(E)
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ii © ISO 2006 – All rights reserved

ISO 6149-2:2006(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 2
4 Dimensions. 2
5 Requirements . 2
6 O-rings . 3
7 Test methods. 3
8 Designation of stud ends. 3
9 Identification. 3
10 Identification statement (reference to this part of ISO 6149). 3
Bibliography . 10

ISO 6149-2:2006(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 6149-2 was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee SC 4,
Connectors and similar products and components.
This second edition cancels and replaces the first edition (ISO 6149-2:1993), which has been technically
revised.
ISO 6149 consists of the following parts, under the general title Connections for hydraulic fluid power and
general use — Ports and stud ends with ISO 261 metric threads and O-ring sealing:
— Part 1: Ports with truncated housing for O-ring seal
— Part 2: Dimensions, design, test methods and requirements for heavy-duty (S series) stud ends
— Part 3: Dimensions, design, test methods and requirements for light-duty (L series) stud ends
— Part 4: Dimensions, design, test methods and requirements of external and internal hexport plugs
iv © ISO 2006 – All rights reserved

ISO 6149-2:2006(E)
Introduction
In hydraulic fluid power systems, power is transmitted and controlled through a liquid under pressure within an
enclosed circuit. In general applications, a fluid (liquid or gas) may be conveyed under pressure.
Components are connected through their threaded ports by stud ends on fluid conductor connectors to tubes
and pipes or to hose fittings and hoses.
For threaded ports and stud ends specified in new designs in hydraulic fluid power applications,
ISO/TC 131/SC 4 recommends that the ISO 6149 series be used because these International Standards
specify ports and stud ends with metric threads and O-ring sealing and because the subcommittee would like
to help users by recommending one preferred system. ISO/TC 131/SC 4 further recommends that threaded
ports and stud ends in accordance with the ISO 1179 series, ISO 9974 series and ISO 11926 series not be
used for new designs in hydraulic fluid power applications; these International Standards are maintained
because they specify ports and stud ends that are currently used in hydraulic systems worldwide.

INTERNATIONAL STANDARD ISO 6149-2:2006(E)

Connections for hydraulic fluid power and general use — Ports
and stud ends with ISO 261 metric threads and O-ring
sealing —
Part 2:
Dimensions, design, test methods and requirements for
heavy-duty (S series) stud ends
1 Scope
This part of ISO 6149 specifies dimensions, performance requirements and test procedures for metric
adjustable and non-adjustable heavy-duty (S series) stud ends and O-rings.
Stud ends in accordance with this part of ISO 6149 may be used at working pressures up to 63 MPa
1)
[630 bar ] for non-adjustable stud ends and 40 MPa (400 bar) for adjustable stud ends. The permissible
working pressure depends upon the stud end size, materials, design, working conditions, application, etc.
Conformance to the dimensional information in this part of ISO 6149 does not guarantee rated performance.
Each manufacturer should perform testing according to the specification contained in this part of ISO 6149 to
assure that components comply with the performance ratings.
NOTE 1 A significant number of tests have been conducted to confirm the performance requirements of connection
ends made from carbon steel.
NOTE 2 This part of ISO 6149 applies to connectors detailed in ISO 8434-1, ISO 8434-3 and ISO 8434-4, and plugs in
accordance with ISO 6149-4. See ISO 12151-4 for related hose fitting specification.
NOTE 3 The Introduction of this part of ISO 6149 gives recommendations for ports and stud ends to be used for new
designs in hydraulic fluid power applications.
2 Normative references
The following referenced documents are indispensable for the application 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 48, Rubber, vulcanized or thermoplastic — Determination of hardness (hardness between 10 IRHD and
100 IRHD)
ISO 261, ISO general purpose metric screw threads –– General plan
ISO 965-1, ISO general purpose metric screw threads — Tolerances –– Part 1: Principles and basic data
ISO 3601-3:2005, Fluid power systems — O-rings — Part 3: Qu
...