IEC 61754-34:2016

Fibre optic interconnecting devices and passive components - Fibre optic connector interfaces - Part 34: Type URM connector family

IEC 61754-34:2016 defines the standard interface dimensions for the type URM family of connectors. Keywords: interface dimensions for type URM connectors

Dispositifs d'interconnexion et composants passifs fibroniques - Interfaces de connecteurs fibroniques - Partie 34: Famille de connecteurs de type URM

L'IEC 61754-34:2016 définit les dimensions des interfaces normalisées pour la famille de connecteurs de type URM. Mots clés: dimensions des interfaces pour de connecteurs de type URM

General Information

• Status: Published
• Publication Date: 25-Sep-2016
• ICS: 33.180.20 - Fibre optic interconnecting devices
• Technical Committee: SC 86B - Fibre optic interconnecting devices and passive components
• Current Stage: PPUB - Publication issued
• Start Date: 26-Sep-2016
• Completion Date: 31-Dec-2016

Overview

IEC 61754-34:2016 is an international standard published by the International Electrotechnical Commission (IEC) that specifies the standard interface dimensions for the type URM family of fibre optic connectors. This standard plays a crucial role in ensuring compatibility and interoperability of fibre optic interconnecting devices and passive components, specifically focusing on the URM connector family. These connectors utilize a duplex design with 1.25 mm nominal diameter ferrules, featuring spring-loaded ferrules and a single male key for precise orientation during mating.

As part of the IEC 61754 series, this standard helps harmonize connector interfaces, facilitating global acceptance and consistent performance in fibre optic communication systems.

Key Topics

• Interface Dimensions: The core of IEC 61754-34 defines comprehensive mechanical dimensions for URM connectors, including two-way and eight-way plug interfaces, adaptor interfaces, and ferrule grade dimensions critical for optical alignment and connection reliability.

• Connector Description: The URM connectors comprise duplex plug/adaptor/plug configurations. The plugs incorporate two spring-loaded ferrules aligned along the optical axis and a male key to ensure correct orientation and limit rotation during mating with adaptors.

• Alignment Mechanism: The standard specifies a resilient sleeve alignment mechanism providing mechanical stability and precision for optical connections, ensuring minimal insertion loss and high repeatability during plug-in and plug-out actions.

• Intermateability & Compliance: IEC 61754-34 ensures plugs and adaptors from different manufacturers comply with unified dimensional specifications, promoting global interoperability of fibre optic systems using the URM connector family.

• Associated Normative References: This document references and aligns with other IEC standards such as IEC 61754-1 (general connector interface guidance), IEC 61755 series (connector optical interfaces), and IEC 60794-2-50 (optical fibre cables), ensuring a comprehensive framework covering mechanical and optical aspects.

Applications

IEC 61754-34:2016 is critical for:

• Telecommunications: Facilitates the design and manufacture of URM fibre optic connectors for high-speed data transmission networks, enabling standardized installation and maintenance.

• Data Centers: Supports modular and scalable optical infrastructure by standardizing connectors, crucial for efficient equipment interconnection and reliable signal transmission.

• Industrial Networking: Ensures rugged, precise fibre optic connections in factory automation and control systems, where consistent interface dimensions are mandatory for system reliability.

• Passive Optical Networks (PON): Enables standardized connector interfaces in broadband access networks, contributing to cost-effective deployment and system interoperability.

• Fibre Optic Equipment Manufacturers: Provides precise dimensional guidelines that underpin product development, quality assurance, and global market compatibility for URM connector-based devices.

Related Standards

For enhanced understanding and implementation, IEC 61754-34:2016 complements the following standards:

• IEC 61754-1: General guidelines on fibre optic connector interfaces, providing foundational requirements applicable to all connector types.

• IEC 61755 Series: Covers detailed optical interface specifications for fibre optic connectors, ensuring optical performance and compatibility.

• IEC 60794-2-50: Defines family specifications for fibre optic cables used in terminated cable assemblies, relevant to connector compatibility.

• ISO and IEC Patent Policies: The IEC highlights that compliance with this standard may involve patent rights and encourages users to review patent information for licensing and usage considerations.

By adhering to IEC 61754-34:2016, industries benefit from a unified standard that streamlines connector design, supports consistent quality, and accelerates deployment of fibre optic communication systems worldwide.

---

Keywords: IEC 61754-34, fibre optic connector interfaces, URM connector family, interface dimensions for type URM connectors, fibre optic interconnecting devices, duplex fibre optic connectors, resilient sleeve alignment, fibre optic standards, IEC fibre optic connectors.

Standards Content (Sample)

IEC 61754-34 ®
Edition 1.0 2016-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components – Fibre optic
connector interfaces –
Part 34: Type URM connector family

Dispositifs d’interconnexion et composants passifs fibroniques – Interfaces de
connecteurs fibroniques –
Partie 34: Famille de connecteurs de type URM

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IEC 61754-34 ®
Edition 1.0 2016-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Fibre optic interconnecting devices and passive components – Fibre optic

connector interfaces –
Part 34: Type URM connector family

Dispositifs d’interconnexion et composants passifs fibroniques – Interfaces de

connecteurs fibroniques –
Partie 34: Famille de connecteurs de type URM

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.180.20 ISBN 978-2-8322-3658-1

– 2 – IEC 61754-34:2016 © IEC 2016
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references. 6
3 Terms and definitions . 6
4 Description . 6
5 Interfaces . 6
6 Two-way plug optical interface . 7
7 Eight-way plug optical interface . 13
8 Ferrule grade dimensions . 19
9 Two-way adaptor interface . 19
10 Eight-way adaptor interface . 22
11 Pin gauge for adaptor . 26
Annex A (informative) Additional adaptor dimensional information . 28
Bibliography . 30

Figure 1 – Two-way plug connector interface . 9
Figure 2 – Two-way plug connector ferrules . 10
Figure 3 – Two-way plug connector APC angle . 11
Figure 4 – Two-way plug connector interface alignment . 11
Figure 5 – Eight-way plug connector interface . 15
Figure 6 – Detail 01 of Figure 5 – expanded view drawings not to scale . 16
Figure 7 – Eight-way plug connector interface APC angle . 17
Figure 8 – Eight-way plug interface alignment . 17
Figure 9 – Two-way adaptor interface . 21
Figure 10 – Eight-way adaptor interface . 25
Figure 11 – Pin gauge for adaptor . 27
Figure A.1 – Outline dimensions – two-way adaptor . 28
Figure A.2 – Outline dimensions – eight-way adaptor . 29

Table 1 – Intermateability between plugs and adaptors interfaces defined in this
document . 7
Table 2 – Dimensions of the two-way plug connector interface . 12
Table 3 – Dimensions of the eight-way plug connector interface . 18
Table 4 – Plug connector interface – ferrule grade . 19
Table 5 – Dimensions of the two-way adaptor interface . 22
Table 6 – Dimensions of the eight-way adaptor interface . 26
Table 7 – Dimensions of the pin gauge . 27
Table A.1 – Outline dimensions – two-way adaptor . 28
Table A.2 – Outline dimensions – eight-way adaptor . 29

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
FIBRE OPTIC INTERCONNECTING
DEVICES AND PASSIVE COMPONENTS –
FIBRE OPTIC CONNECTOR INTERFACES –

Part 34: Type URM connector family

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61754-34 has been prepared by subcommittee 86B: Fibre optic
interconnecting devices and passive components, of IEC technical committee 86: Fibre optics.
The text of this standard is based on the following documents:
CDV Report on voting
86B/3966/CDV 86B/3999A/RVC
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

– 4 – IEC 61754-34:2016 © IEC 2016
A list of all parts in the IEC 61754 series, published under the general title Fibre optic
interconnecting devices and passive components – Fibre optic connector interfaces, can be
found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
INTRODUCTION
The International Electrotechnical Commission (IEC) draws attention to the fact that it is
claimed that compliance with this document may involve the use of a patent concerning
IEC 61754-34.
IEC takes no position concerning the evidence, validity and scope of this patent right.
The holder of this patent right has assured the IEC that he/she is willing to negotiate licences
under reasonable and non-discriminatory terms and conditions with applicants throughout the
world. In this respect, the statement of the holder of this patent right is registered with IEC.
Information may be obtained from:
EUROMICRON Werkzeuge GmbH
Zur Dornheck 32-34
35764 Sinn-Fleisbach
Germany
Attention is drawn to the possibility that some of the elements of this document may be the
subject of patent rights other than those identified above. IEC shall not be held responsible for
identifying any or all such patent rights.
ISO (www.iso.org/patents) and IEC (http://www.iec.ch/tctools/patent_decl.htm) maintain on-
line data bases of patents relevant to their standards. Users are encouraged to consult the
data bases for the most up to date information concerning patents.

– 6 – IEC 61754-34:2016 © IEC 2016
FIBRE OPTIC INTERCONNECTING
DEVICES AND PASSIVE COMPONENTS –
FIBRE OPTIC CONNECTOR INTERFACES –

Part 34: Type URM connector family

1 Scope
This part of IEC 61754 defines the standard interface dimensions for the type URM family of
connectors.
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.
IEC 60794-2-50, Optical fibre cables – Part 2-50: Indoor cables – Family specification for
simplex and duplex cables for use in terminated cable assemblies
IEC 61754-1, Fibre optic interconnecting devices and passive components – Fibre optic
connector interfaces – Part 1: General and guidance
IEC 61755-3 (all parts), Fibre optic interconnecting devices and passive components –
Connector optical interfaces
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
– IEC Electropedia: available at http://www.electropedia.org/
– ISO Online browsing platform: available at http://www.iso.org/obp
4 Description
The parent connector for the type URM connector family is a duplex connector set of
plug/adaptor/plug configuration which is characterized by a 1,25 mm nominal diameter ferrule.
The plug connector includes two spring loaded ferrules in the direction of the optical axis. The
plug also has a single male key, which may be used to orientate and limit the relative position
between the connector and the adaptor to which it is mated. The optical alignment mechanism
of the connectors is a resilient sleeve. Drawings and dimensions provided consist of those
minimum features that are functionally critical during the mating and unmating sequences of
the plug with its adaptor counterpart component.
5 Interfaces
General requirements defined in IEC 61754-1 shall be used for this document.

The subsequent clauses define the standard interfaces for the type URM connector series.
This document contains the following standard interfaces:
Interface 34-1: two-way plug connector interface – PC
Interface 34-2: two-way adaptor connector interface
Interface 34-3: two-way plug connector interface – APC 8°
Interface 34-4: eight-way plug connector interface – PC
Interface 34-5: eight-way adaptor connector interface
Interface 34-6: eight-way plug connector interface – APC 8°
The intermateability between plugs and adaptors is given in Table 1.
The interface dimensions for adaptors and appropriate fibre management systems are given
for information in Annex A.
The following standardized interfaces are intermateable.
Table 1 – Intermateability between plugs and adaptors
interfaces defined in this document
Plug interfaces Adaptor interfaces
34-2 34-5
34-1 mate mate
34-3 mate mate
34-4 not mate mate
34-6 not mate mate
6 Two-way plug optical interface
Two-way plug optical interface dimensions are shown in Figure 1, Figure 2, Figure 3 and
Figure 4 as well as in Table 2.

– 8 – IEC 61754-34:2016 © IEC 2016
Z
Optical reference plane
H1 H2
T
J
Optical datum
target
I
Mechanical reference plane
IEC
a) Top view
HH
AA
IEC
b) Side view
O
C C
L
IEC
c) Front view
Y
F
G
K
X
P
U
V
JJ
Detail 01
M
N
IEC
d) Section C-C
Mechanical reference plane
W2
W1
IEC
e) Detail 01
Key to dimensions given in Table 2.
Figure 1 – Two-way plug connector interface
The plug of interface 34-1 has a ferrule with a spherically polished endface (PC) shown in
Detail 01 of Figure 2a) and Figure 2b). The plug of interface 34-3 has a ferrule with a
spherically polished angled endface shown in Detail 01 of Figure 2a) and Figure 2c).
S
– 10 – IEC 61754-34:2016 © IEC 2016
Detail 01
IEC
a) Top view
AE
No sharp
edges
AF
AG
IEC
b) Detail 01 for PC ferrule endface geometry
AE
No sharp
edges
AF
AG
IEC
c) Detail 01 for APC polish conical ferrule
Key to dimensions given in Table 2.
Figure 2 – Two-way plug connector ferrules
Refer to IEC 61755-3 series for information on the endface geometry requirements of PC and
APC interfaces, respectively.
Figure 3 shows details of the APC ferrule endface geometry and Figure 4 shows alignment
characteristics of the connector.

Detail 01
IEC
a) Top view
AN
Angled PC
reference plane IEC
b) Detail 01
Key to dimensions given in Table 2.
Figure 3 – Two-way plug connector APC angle
Plane C
AM
Plane D
IEC
Key to dimensions given in Table 2.
Figure 4 – Two-way plug connector interface alignment

– 12 – IEC 61754-34:2016 © IEC 2016
Table 2 – Dimensions of the two-way plug connector interface
Dimensions
Reference Remarks
Minimum Maximum
F 8,30 mm 8,55 mm
G 4,80 mm 5,00 mm
a, b
H1 5,20 mm 5,30 mm
c
H2 4,80 mm 4,90 mm
c, d
I 0,40 mm 0,90 mm
J 1,25 mm
K  ferrule diameter, Table 4
L 2,80 mm nominal dimension
M 5,70 mm 5,80 mm
N 6,40 mm 6,60 mm
O 7,60 mm 7,85 mm
P 3,60 mm 3,80 mm
S 1,80 mm 2,10 mm
c
T 3,20 mm 3,80 mm
U 1,40 mm 1,60 mm
V 3,80 mm 4,10 mm
W1 5° 30°
W2 0° 45°
X 1,90 mm 2,10 mm diameter
Y 8,90 mm 9,40 mm
c
Z 5,90 mm 6,70 mm
b
AA 4,60 mm 4,90 mm
AE 0,60 mm 0,85 mm
AF 5,00 mm 30,00 mm
AG 30° 45°
AH 0,60 mm 0,85 mm
AI 5,00 mm 12,00 mm
e
AM 90° nominal dimension
b
AN 8° nominal dimension
HH 0,40 mm 0,60 mm
JJ 1,90 mm 2,70 mm
a
Dimension H1 is given for a plug endface when not mated. The ferrule is movable by a certain axial
compression force, with direct contacting endface, and therefore dimension H1 is variable. Ferrule
compression force shall be 5,0 N to 6,0 N when the position of the optical datum target, dimension H1, is
moved to the range from 4,8 mm to 5,1 mm. Forces are for buffered fibre only; different cord constructions
can result in higher forces (see IEC 60794-2-50).
b
These dimensional requirements apply to the finished ferrule after all polishing procedures have been
completed.
c
The outer housing is movable to the left and to the right. These dimensions are given when the release case
has been moved to the leftmost position.
d
When the outer housing has been moved in the rightmost position, the inner housing shall protrude from the
outer housing.
e
Dimension AM is defined as an angle between two planes. One plane, plane C, passes through the axis
parallel to the axes of the ferrules and the axis of symmetry of the key of the angled endface plug connector.
The other plane, plane D, passes through the axes of the ferrules and the plane normal to the angled PC
reference plane.
7 Eight-way plug optical interface
Eight-way plug optical interface dimensions are shown in Figure 5, Figure 6, Figure 7 and
Figure 8 as well as in Table 3.
T
J
I
Z
IEC
a) Top view
LL
C
Detail 01
C
IEC
b) Front view
Y
F
L
K
U
– 14 – IEC 61754-34:2016 © IEC 2016
Optical reference
plane
H1 H2
Optical datum
AA
target
HH
IEC
c) Side view
Detail 02
S
IEC
d) Section C-C
EE
X
M
N
JJ
V
P
G
IEC
e) Detail 01
Mechanical reference
plane
W1
W2
IEC
f) Detail 02
Key to dimensions given in Table 3.
Figure 5 – Eight-way plug connector interface
The plug of interface 34-4 has a ferrule with a spherically polished endface (PC) shown in
Detail 01 of Figure 6a) and in Figure 6b). The plug of interface 34-6 has a ferrule with a
spherically polished angled endface shown in Detail 01 of Figure 6a) and in Figure 6c).
O
– 16 – IEC 61754-34:2016 © IEC 2016
Detail 01
IEC
a) Top view
AE
No sharp
edges
AF
AG
IEC
b) Detail 01 for PC ferrule endface geometry
AH
No sharp
edges
AI
AG
IEC
c) Detail 01 for APC polish conical ferrule
Key to dimensions given in Table 3.
Figure 6 – Detail 01 of Figure 5 – expanded view drawings not to scale
Refer to IEC 61755-3 series for information on the endface geometry requirements of PC and
APC interfaces, respectively.
Figure 7 shows details of the APC ferrule endface geometry and Figure 8 shows alignment
characteristics of the connector.

Detail 01
IEC
a) Top view
AN
Angled PC
reference plane IEC
b) Detail 01
Key to dimensions given in Table 3.
Figure 7 – Eight-way plug connector interface APC angle
Plane C
AM
Plane D
IEC
Key to dimensions given in Table 3.
Figure 8 – Eight-way plug interface alignment

– 18 – IEC 61754-34:2016 © IEC 2016
Table 3 – Dimensions of the eight-way plug connector interface
Dimensions
Reference Remarks
Minimum Maximum
F 8,30 mm 8,55 mm
G 4,80 mm 5,00 mm
a, b
H1 5,20 mm 5,30 mm
c
H2 4,80 mm 4,90 mm
c, d
I 0,40 mm 0,90 mm
J 1,25 mm
K  ferrule diameter, Table 4
L 2,80 mm nominal dimension
M 5,70 mm 5,80 mm
N 6,40 mm 6,60 mm
O 7,60 mm 7,85 mm
P 3,60 mm 3,80 mm
S 1,80 mm 2,10 mm
c
T 3,20 mm 3,80 mm
U 1,40 mm 1,60 mm
V 3,80 mm 4,10 mm
W1 5° 30°
W2 0° 45°
X 1,90 mm 2,10 mm diameter
Y 8,90 mm 9,40 mm
c
Z 5,90 mm 6,70 mm
AA 4,60 mm 4,90 mm
AE 0,60 mm 0,85 mm
AF 5,00 mm 30,00 mm
AG 30° 45°
AH 0,60 mm 0,85 mm
AI 5,00 mm 12,00 mm
e
AM 90° nominal dimension
b
AN 8° nominal dimension
EE 23,80 mm 24,00 mm
HH 0,40 mm 0,60 mm
JJ 1,90 mm 2,70 mm
LL 6,40 mm
a
Dimension H1 is given for a plug endface when not mated. The ferrule is movable by a certain axial
compression force, with direct contacting endface, and therefore dimension H1 is variable. Ferrule
compression force shall be 5,0 N to 6,0 N when the position of the optical datum target, dimension H1, is
moved to the range from 4,8 mm to 5,1 mm. Forces are for buffered fibre only; different cord constructions
can result in higher forces (see IEC 60794-2-50).
b
These dimensional requirements apply to the finished ferrule after all polishing procedures have been
completed.
c
The outer housing shall be movable to the left and to the right. These dimensions are given when the release
case has been moved to the farthest left position.
d
When the outer housing has been moved in the farthest right position, the inner housing shall protrude from
the outer housing.
e
Dimension AM is defined as an angle between two planes. One plane, plane C, passes through the axis
parallel to the axes of the ferrules and the axis of symmetry of the key of the angled endface plug connector.
The other plane, plane D, passes through the axes of the ferrules and the plane normal to the angled PC
reference plane.
8 Ferrule grade dimensions
Dimensions of the ferrule grades for diameter K are given in Table 4.
Table 4 – Plug connector interface – ferrule grade
Diameter K
mm
Grade Remarks
Minimum Maximum
a
1 1,248 5 1,249 5
a
2 1,248 3 1,249 5
a
3 1,246 7 1,249 5
a
The ferrule material is zirconia ceramic. Alternative materials that have directly compatible material properties
with zirconia may be used for the ferrule, but the endface performance requirements shall be met under all
conditions.
9 Two-way adaptor interface
Two-way adaptor optical interface dimensions are shown in Figure 9 as well as in Table 5.
U
IEC
a) Top view
EA
T
– 20 – IEC 61754-34:2016 © IEC 2016
Y
L
C
C
K
IEC
b) Front view
HH
H
IEC
c) Side view
BB
AA
P
JJ
G
F
O
N
M
Mechanical reference
plane
Optical reference
plane
Detail 01
IEC
d) Section C-C
W
IEC
e) Detail 01
Key to dimensions given in Table 5.
Figure 9 – Two-way adaptor interface
S
I II
J
– 22 – IEC 61754-34:2016 © IEC 2016
Table 5 – Dimensions of the two-way adaptor interface
Dimensions
a
Reference mm Remarks
Minimum Maximum
F 8,60 8,80
G 5,05 5,20
H 9,70 10,20
I 3,80 4,20
J 4,50 4,80
K 1,30 1,50 diameter
L 2,80 nominal dimension
M 5,80 5,90
N 6,45 6,65
O 7,30 7,60
P 3,25 3,45
S 6,80 7,00
T 6,55 7,25
U 1,70 1,90
W 0,20 0,30 radius
Y 4,50 4,70
AA 2,40 2,60
BB 3,40 3,60
EA 21,40 22,20
HH 0,65 0,90
II 6,00 nominal dimension
JJ 2,90 3,20
a
The connector alignment feature is a resilient (split) alignment sleeve. The feature shall accept a pin gauge
to the centre of the adaptor with a force of 1,0 N to 2,5 N under the condition that another pin gauge is
inserted into the feature from the other side until both pin gauges butt against each other. The pin gauge
shall be according to Figure 11.

10 Eight-way adaptor interface
Eight-way adaptor optical interface dimensions are shown in Figure 10 as well as in Table 6.

T
IEC
a) Top view
JJ
C
Optical reference
plane
C
IEC
b) Side view
EA
H
U
HH
– 24 – IEC 61754-34:2016 © IEC 2016
EE
LL
Detail 01
G
IEC
c) Front view
AA
BB
DD
P
IEC
d) Detail 01
L
Y
K
Mechanical
reference
plane
Detail 02
M
N
O
F
IEC
e) Section C-C
W
IEC
f) Detail 02
Key to dimensions given in Table 6.
Figure 10 – Eight-way adaptor interface
S
I II
J
– 26 – IEC 61754-34:2016 © IEC 2016
Table 6 – Dimensions of the eight-way adaptor interface
Dimensions
a
Reference mm Remarks
Minimum Maximum
F 8,60 8,80
G 5,05 5,20
H 9,70 10,20
I 3,80 4,20
J 4,50 4,80
K 1,30 1,50 diameter
L 2,80 nominal dimensions
M 5,80 5,90
N 6,45 6,65
O 7,30 7,60
P 3,25 3,45
S 6,80 7,00
T 6,55 7,25
U 1,70 1,90
W 0,20 0,30 radius
Y 4,50 4,70
AA 2,40 2,60
BB 3,40 3,60
DD 3,10 3,30
EA 21,40 22,20
EE 24,20 24,40
HH 0,65 0,90
II 6,00 nominal dimension
JJ 2,90 3,20
LL 6,40 nominal dimension
a
The connector alignment feature is a resilient (split) alignment sleeve. The feature shall accept a pin gauge
to the centre of the adaptor with a force of 1,0 N to 2,5 N under the condition that another pin gauge is
inserted into the feature from the other side until both pin gauges butt against each other. The pin gauge
shall be according to Figure 11.

11 Pin gauge for adaptor
Figure 11 shows pin gauge for adaptor. Table 7 shows pin gauge dimensions.

CN
Chamfer or radius
IEC
Key to dimensions given in Table 7.
Figure 11 – Pin gauge for adaptor
Table 7 – Dimensions of the pin gauge
Diameter CK CN
Pin gauge
mm mm
Notes
grade
Minimum Maximum Minimum Maximum
a
1,249 1,248 8 1,249 2 4,2 15
a
Surface roughness shall be < 0,2 µm Ra; cylindricity is less than 0,5 µm.

CK
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