IEC 61076-2-101:2012

Connectors for electronic equipment - Product requirements - Part 2-101: Circular connectors - Detail specification for M12 connectors with screw-locking

IEC 61076-2-101:2012 describes M12 circular connectors typically used for industrial process measurement and control. These connectors consist of fixed and free connectors either rewireable or non-rewireable, with screw-locking. The connectors with glass to metal seal are fixed connectors only which consist of fixed glass to metal sealed styles with rewireable male contacts and are intermateable with corresponding free connectors according to this International Standard. Male connectors have round contacts 0,6 mm, 0,76 mm, 0,8 mm and 1,0 mm. The different codings prevent the mating of these coded male or female connectors to any other interfaces and cross-mating between the different codings. This third edition cancels and replaces the second edition published in 2008 and its corrigendum published in 2010. It constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- The drawings of some styles have been corrected,
- A new style with maximum 17 poles, with A-coding, has been added, as new applications for the industrial process measurement and control require a high number of poles in M12 circular connectors. The existing styles and dimensions which were specified in IEC 61076-2-101 Ed.2 are further applicable for the added interface dimension of the 17 poles versions,
- Removal of the type designation and ordering information, former Tables 6 and 7 have been updated accordingly and
- Inclusion of the technical content of IEC PAS 61076-2-108, which will be withdrawn after publication of this International Standard. The drawings have been updated and correction to the title of Figure 9 was made. Keywords: M12 connectors, Circular connector

Connecteurs pour équipements électroniques - Exigences de produit - Partie 2-101: Connecteurs circulaires - Spécification particulière pour les connecteurs M12 à vis

La CEI 61076-2-101:2012 décrit les connecteurs circulaires M12 qui sont généralement utilisés pour les mesures et les commandes dans les processus industriels. Ces connecteurs se composent d'embases et de fiches, démontables ou non et sont équipés d'un système à vis. Les connecteurs à joints verre-métal sont uniquement des embases constituées de modèles à joints verre-métal avec contacts mâles démontables et qui sont accouplables aux fiches correspondantes conformes à la présente Norme Internationale. Les connecteurs mâles possèdent des contacts arrondis de 0,6 mm, 0,76 mm, 0,8 mm et 1,0 mm. Les différents codages empêchent l'accouplement de ces connecteurs codés mâles ou femelles avec toute autre interface ainsi que l'accouplement croisé entre les différents codages. Cette troisième édition annule et remplace la deuxième édition parue en 2008 et son corrigendum paru en 2010. Elle constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- Les dessins de certains modèles ont été corrigés, Un nouveau modèle avec 17 pôles au maximum et un codage A, a été ajouté, car les nouvelles applications pour les dispositifs de mesure et de commande dans les processus industriels exigent un nombre élevé de pôles dans les connecteurs circulaires M12. Les modèles et les dimensions qui existent et qui étaient spécifiés dans la CEI 61076-2-101 Ed.2 sont toujours applicables pour la dimension d'interface ajoutée des versions à 17 pôles,
- Suppression de la désignation de type et des renseignements pour les commandes, les anciens Tableaux 6 et 7 ont été mis à jour en conséquence,
- Ajout du contenu technique de la CEI/PAS 61076-2-108, qui sera annulée après publication de la présente Norme Internationale. Les dessins ont été mis à jour et le titre de la Figure 9 a été corrigé. Mots clé: connecteurs M12, connecteurs circulaires.

General Information

• Status: Published
• Publication Date: 19-Apr-2012
• ICS: 31.220.10 - Plug-and-socket devices. Connectors
• Technical Committee: SC 48B - Electrical connectors
• Current Stage: DELPUB - Deleted Publication
• Start Date: 27-Nov-2024
• Completion Date: 22-Jul-2022

Relations

• Replaces: IEC PAS 61076-2-108:2009 - Connectors for electronic equipment - Product requirements - Part 2-108: Circular connectors - Detail specification for glass to metal seal style M12 connectors with screw-locking intended to mate with connectors conforming to IEC 61076-2-101
• Effective Date: 05-Sep-2023
• Revises: IEC 61076-2-101:2008/COR1:2010 - Corrigendum 1 - Connectors for electronic equipment - Product requirements - Part 2-101: Circular connectors - Detail specification for M12 connectors with screw-locking
• Effective Date: 05-Sep-2023
• Revised: IEC 61076-2-101:2024 - Connectors for electrical and electronic equipment - Product requirements - Part 2-101: Circular connectors - Detail specification for M12 connectors with screw-locking
• Effective Date: 05-Sep-2023
• Revises: IEC 61076-2-101:2008 - Connectors for electronic equipment - Product requirements - Part 2-101: Circular connectors - Detail specification for M12 connectors with screw-locking
• Effective Date: 05-Sep-2023

Overview

IEC 61076-2-101:2012 is an international standard published by the International Electrotechnical Commission (IEC) that specifies product requirements for M12 circular connectors with screw-locking mechanisms. These connectors are commonly used in industrial process measurement and control applications due to their robust design and reliable connection characteristics. This third edition of the standard replaces the second edition from 2008 and incorporates significant technical revisions, including the addition of a new 17-pole connector variant to support high-density applications.

The standard defines dimensions, mechanical and electrical performance, coding methods to prevent cross-mating, and various connector styles for both fixed and free types. It also details test procedures to ensure the connectors meet the necessary reliability and safety requirements in demanding industrial environments.

Key Topics

• Connector Types and Styles
  The standard covers fixed and free circular M12 connectors, including rewireable and non-rewireable designs. Fixed connectors can include glass-to-metal sealed versions that provide enhanced environmental protection.

• Coding System
  Different coding options (A, B, C, D, P) are specified to prevent incorrect mating between connectors and to ensure system integrity. Each coding supports different numbers of contacts and applications.

• Mechanical and Dimensional Specifications
  Detailed drawings and dimensions for standard connector interfaces and mounting options are provided to enable interoperability and correct installation. Screw-locking ensures secure engagement in industrial settings.

• Electrical Ratings
  The connectors are rated for various voltages, currents, and impulse voltages with consideration for pollution degree and environmental conditions. Electrical endurance such as contact resistance and insulation resistance are also defined.

• Environmental and Mechanical Performance
  The standard defines IP protection levels, vibration resistance, mechanical endurance, insertion/withdrawal forces, and tests to simulate harsh climatic and chemical conditions.

• Testing Procedures
  A comprehensive test schedule includes mechanical, climatic, electrical, and chemical resistance tests to validate connector performance under operating conditions typical for industrial automation systems.

Applications

IEC 61076-2-101 M12 connectors are widely used in industrial automation, process control, factory machinery, and sensor/actuator connections where secure, reliable circular connectors are essential. Their screw-locking design and coding prevent accidental disconnections and cross-mating, enhancing system safety and uptime. Typical applications include:

• Industrial process measurement and control systems
• Sensor and actuator connections in factory automation
• Instrumentation wiring in harsh or demanding environments
• Communication interfaces in industrial networks requiring robust physical connectors
• High-pole count connector solutions for complex industrial instrumentation setups

Related Standards

• IEC 61076 Series – Specifies general requirements for connectors for electronic equipment, with Part 2 addressing circular connector detail specifications.
• IEC PAS 61076-2-108 – Its technical content has been incorporated into IEC 61076-2-101:2012 and will be withdrawn after this publication.
• Other IEC Standards on Connector Testing – Provide harmonized procedures and definitions for connector qualification, performance, and safety applicable to electronic and electrotechnical connectors.

By complying with IEC 61076-2-101:2012, manufacturers ensure their M12 circular connectors meet international quality and performance benchmarks, facilitating reliable interoperability and safety in industrial electronic equipment.

---

Keywords: IEC 61076-2-101, M12 connectors, Circular connectors, screw-locking connectors, industrial process measurement, connector coding, connector specifications, industrial automation connectors, connector testing, IEC standards.

Standards Content (Sample)

IEC 61076-2-101 ®
Edition 3.0 2012-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Connectors for electronic equipment – Product requirements –
Part 2-101: Circular connectors – Detail specification for M12 connectors
with screw-locking
Connecteurs pour équipements électroniques – Exigences de produit –
Partie 2-101: Connecteurs circulaires – Spécification particulière pour les
connecteurs M12 à vis
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IEC 61076-2-101 ®
Edition 3.0 2012-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Connectors for electronic equipment – Product requirements –

Part 2-101: Circular connectors – Detail specification for M12 connectors

with screw-locking
Connecteurs pour équipements électroniques – Exigences de produit –

Partie 2-101: Connecteurs circulaires – Spécification particulière pour les

connecteurs M12 à vis
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
XA
CODE PRIX
ICS 31.220.10 ISBN 978-2-8322-0058-2

– 2 – 61076-2-101 © IEC:2012
CONTENTS
FOREWORD . 5
1 Scope . 8
2 Normative references . 8
3 Technical information . 9
3.1 Terms and definitions . 9
3.2 Recommended method of termination . 9
3.2.1 General . 9
3.2.2 Number of contacts or contact cavities . 10
3.3 Ratings and characteristics . 10
3.4 Marking . 10
3.5 Safety aspects. 10
4 Dimensional information . 11
4.1 General . 11
4.2 Survey of styles and variants . 11
4.2.1 Fixed connectors . 11
4.2.2 Free connectors . 22
4.3 Interface dimensions . 27
4.3.1 Pin front view A-coding . 27
4.3.2 Pin front view B-coding . 32
4.3.3 Pin front view C-coding . 33
4.3.4 Pin front view D-coding . 36
4.3.5 Pin front view P-coding . 37
4.4 Engagement (mating) information . 38
4.5 Gauges . 40
5 Characteristics . 41
5.1 Climatic category . 41
5.2 Electrical characteristics . 41
5.2.1 Rated voltage – Rated impulse voltage – Pollution degree . 41
5.2.2 Voltage proof . 42
5.2.3 Current-carrying capacity. 43
5.2.4 Contact resistance . 43
5.2.5 Insulation resistance . 44
5.3 Mechanical characteristics . 44
5.3.1 IP degree of protection . 44
5.3.2 Mechanical operation . 44
5.3.3 Insertion and withdrawal forces . 44
5.3.4 Contact retention in insert . 44
5.3.5 Polarizing method . 45
5.3.6 Vibration (sinusoidal) . 45
5.3.7 Pressure differential . 45
6 Test schedule . 45
6.1 General . 45
6.2 Arrangement for contact resistance measurements . 46
6.3 Arrangement for dynamic stress tests (vibration) . 46
6.4 Test schedule . 48

61076-2-101 © IEC:2012 – 3 –
6.4.1 Test group P – Preliminary . 48
6.4.2 Test group AP – Dynamic/ Climatic . 49
6.4.3 Test group BP – Mechanical endurance . 52
6.4.4 Test group CP – Electrical load . 54
6.4.5 Test group DP – Chemical resistivity . 55
6.4.6 Test group EP – Connection method tests . 55
6.4.7 Test group FP – Electrical transmission requirements . 56
Annex A (informative) Diameter of the female connector body . 57
Annex B (informative) Steel conduit thread, sizes . 58

Figure 1 – Tube insert, male contacts, mounting without thread (thread on tube) . 12
Figure 2 – Tube insert, male contacts, mounting with thread M12 × 1 . 12
Figure 3 – Fixed connector, male contacts, mounting with thread M12 × 1, square
flange front mounting . 13
Figure 4 – Fixed connector, male contacts, mounting with thread M12 × 1, with wire
ends, single hole mounting thread M16 × 1,5 . 14
Figure 5 – Fixed connector, male contacts, mounting with thread M12 × 1, with wire
ends, single hole mounting thread M20 × 1,5 . 14
Figure 6 – Fixed connector, male contacts, mounting with thread M12 × 1 with wire
ends, single hole mounting thread M16 × 1,5, mounting orientation . 15
Figure 7 – Fixed connector, male contacts, mounting with thread M12 × 1, with wire
ends, single hole mounting thread M20 × 1,5, mounting orientation . 15
Figure 8 – Fixed connector, glass to metal seal, square flange front mounting, male
contacts . 16
Figure 9 – Fixed connector, glass to metal seal, single hole front mounting, male
contacts . 17
Figure 10 – Fixed connector, glass to metal seal, jam nut rear mounting, male
contacts . 18
Figure 11 – Fixed connector, glass to metal seal, through flange mounting, male
contacts . 19
Figure 12 – Fixed connector, female contacts, mounting with thread M12 × 1, with wire
ends, single hole mounting thread M16 × 1,5 . 19
Figure 13 – Fixed connector, female contacts, mounting with thread M12 × 1, with wire
ends, single hole mounting thread M20 × 1,5 . 20
Figure 14 – Fixed connector, female contacts, mounting with thread M12 × 1, with wire
ends, single hole mounting thread M16 × 1,5, mounting orientation . 21
Figure 15 – Fixed connector, female contacts, mounting with thread M12 × 1, with wire
ends, single hole mounting thread M20 × 1,5, mounting orientation . 21
Figure 16 – Rewireable connector, male contacts, straight version, with locking nut . 22
Figure 17 – Rewireable connector, male contacts, right angled version, with locking nut. 23
Figure 18 – Non-rewireable connector, male contacts, straight version, with locking nut . 23
Figure 19 – Non-rewireable connector, male contacts, right angled version, with
locking nut . 24
Figure 20 – Non-rewireable connector, male contacts, right angled higher version, with
locking nut . 24
Figure 21 – Rewireable connector, female contacts, straight version, with locking nut . 25
Figure 22 – Rewireable connector, female contacts, right angled version, with locking nut . 25
Figure 23 – Non-rewireable connector, female contacts, straight version, with locking nut . 26

– 4 – 61076-2-101 © IEC:2012
Figure 24 – Non-rewireable connector, female contacts, right angled version, with
locking nut . 26
Figure 25 – Pin front view A-coding, up to 12 ways . 27
Figure 26 – Pin front view A-coding, 13 up to 17 ways . 28
Figure 27 – Contact position A-coding front view . 30
Figure 28 – Pin front view B-coding . 32
Figure 29 – Contact position B-coding front view . 32
Figure 30 – Pin front view 3 way with C-coding . 33
Figure 31 – Pin front view 4 way with C-coding . 33
Figure 32 – Pin front view 5 way with C-coding . 34
Figure 33 – Pin front view 6 way with C-coding . 34
Figure 34 – Contact position C-coding front view . 35
Figure 35 – Pin front view D-coding . 36
Figure 36 – Contact position D-coding front view . 36
Figure 37 – Pin front view P-coding . 37
Figure 38 – Contact position P-coding front view . 37
Figure 39 – Engagement (mating) information . 38
Figure 40 – Gauge dimensions . 41
Figure 41 – Contact resistance arrangement . 46
Figure 42 – Dynamic stress test arrangement . 47
Figure A.1 – Diameter of the female connector body . 57
Figure B.1 – Dimensions Pg thread . 58

Table 1 – Ratings of connectors . 10
Table 2 – Styles of fixed connectors . 11
Table 3 – Styles of free connectors . 22
Table 4 – Connectors dimensions in mated and locked position . 39
Table 5 – Gauges . 41
Table 6 – Climatic category . 41
Table 7 – Rated voltage – Rated impulse voltage – Pollution degree . 42
Table 8 – Voltage proof. 43
Table 9 – Number of mechanical operations . 44
Table 10 – Insertion and withdrawal forces . 44
Table 11 – Number of test specimens . 46
Table 12 – Test group P . 48
Table 13 – Test group AP . 49
Table 14 – Test group BP . 52
Table 15 – Test group CP . 54
Table 16 – Test group DP . 55
Table 17 – Test group EP . 55
Table 18 – Test group FP . 56
Table A.1 – Diameter of the female connector body, dimension x . 57
Table B.1 – Dimensions . 59

61076-2-101 © IEC:2012 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CONNECTORS FOR ELECTRONIC EQUIPMENT –
PRODUCT REQUIREMENTS –
Part 2-101: Circular connectors –
Detail specification for M12 connectors with screw-locking

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 61076-2-101 has been prepared by sub-committee 48B:
Connectors, of Technical Committee 48: Electromechanical components and mechanical
structures for electronic equipment.
This third edition cancels and replaces the second edition published in 2008 and its
corrigendum published in 2010. It constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
– The drawings of some styles have been corrected.
– A new style with maximum 17 poles, with A-coding, has been added, as new
applications for the industrial process measurement and control require a high number
of poles in M12 circular connectors. The existing styles and dimensions which were

– 6 – 61076-2-101 © IEC:2012
specified in IEC 61076-2-101 Ed. 2 are further applicable for the added interface
dimension of the 17 poles versions.
– Removal of the type designation and ordering information, former Tables 6 and 7 have
been updated accordingly.
– Inclusion of the technical content of IEC PAS 61076-2-108, which will be withdrawn
after publication of this International Standard. The drawings have been updated and
correction to the title of Figure 9 was made.
The text of this standard is based on the following documents:
FDIS Report on voting
48B/2279/FDIS 48B/2288/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
A list of all parts of IEC 61076 series, under the general title Connectors for electronic
equipment – Product requirements, can be found on the IEC website.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site 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.
61076-2-101 © IEC:2012 – 7 –
IEC SC 48B – Connectors IEC 61076-2-101 Ed. 3.0

Specification available from:
IEC General secretariat
or from the addresses shown on the inside cover.

ELECTRONIC COMPONENTS
DETAIL SPECIFICATION in accordance with IEC 61076-1

Circular connectors
M12       2 to 17 way
Male and female contacts
Male and female connectors
Rewireable – Non-rewireable
Free cable connectors
Straight and right angle connectors
Fixed connectors
Fixed connectors with glass to metal
seals (pin contacts only)
Flange mounting
Single hole mounting
IEC  2336/03
Pin sockets
– 8 – 61076-2-101 © IEC:2012
CONNECTORS FOR ELECTRONIC EQUIPMENT –
PRODUCT REQUIREMENTS –
Part 2-101: Circular connectors –
Detail specification for M12 connectors with screw-locking

1 Scope
This part of IEC 61076 describes M12 circular connectors typically used for industrial process
measurement and control. These connectors consist of fixed and free connectors either
rewireable or non-rewireable, with screw-locking. The connectors with glass to metal seal are
fixed connectors only which consist of fixed glass to metal sealed styles with rewireable male
contacts and are intermateable with corresponding free connectors according to this
International Standard. Male connectors have round contacts ∅ 0,6 mm, ∅ 0,76 mm, ∅ 0,8
mm and ∅ 1,0 mm.
The different codings prevent the mating of these coded male or female connectors to any
other interfaces and cross-mating between the different codings.
NOTE M12 is the dimension of the thread of the screw-locking mechanism of these circular connectors.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60050-581: 2008, International Electrotechnical Vocabulary (IEV) – Part 581:
Electromechanical components for electronic equipment
IEC 60068-1, Environmental testing – Part 1: General and guidance
IEC 60068-2-60, Environmental testing – Part 2: Tests –Test Ke: Flowing mixed gas
corrosion test
IEC 60352 (all parts), Solderless connections
IEC 60423:2007, Conduit systems for cable management – Outside diameters of conduits for
electrical installations and threads for conduits and fittings
IEC 60512 (all parts), Connectors for electronic equipment – Tests and measurements
IEC 60512-1-100, Connectors for electronic equipment – Tests and measurements – Part 1-
100: General – Applicable publications
IEC 60529:1989, Degrees of protection provided by enclosures (IP code)
IEC 60664-1, Insulation coordination for equipment within low-voltage systems – Part 1:
Principles, requirements and tests

61076-2-101 © IEC:2012 – 9 –
IEC 60998-2-1, Connecting devices for low-voltage circuits for household and similar
purposes – Part 2-1: Particular requirements for connecting devices as separate entities with
screw-type clamping units
IEC 60999 (all parts), Connecting devices – Electrical copper conductors – Safety
requirements for screw-type and screwless-type clamping units
IEC 61076-1:2006, Connectors for electronic equipment – Product requirements – Part 1:
Generic specification
IEC 61984, Connectors – Safety requirements and tests
ISO 1302: Technical drawings – Methods of indicating surface texture
3 Technical information
3.1 Terms and definitions
For the purposes of this document, terms and definitions from IEC 60050-581 as well as the
following apply.
3.1.1
mounting orientation
circular mounting position of the connector in relation to the polarization of the mating
interface
NOTE Where the free connector has an angled cable entry (as opposed to an in-line cable entry), the angle
between the cable entry direction and the polarization keyway should be specified.
3.1.2
glass to metal seal
a form of construction whereby the connector contacts are housed in a glass insert which is
inside a metal connector shell so as to form a connector with a hermetic seal which may be
used to isolate differing environments
3.1.3
matched glass to metal seal
a form of construction whereby the thermal expansion characteristics of the glass, the metallic
contacts, and the connector shell are similar and the seal between the glass and the metal is
formed by a chemical bond
3.1.4
compression glass to metal seal
a form of construction whereby due to the its higher coefficient of expansion the shell
contracts around the glass during the solidification phase of manufacture applying a
compression force to the glass insert so as to form a seal
3.2 Recommended method of termination
3.2.1 General
The contact terminations shall be of the following types: screw, crimp, insulation piercing,
insulation displacement, press-in or solder. For the male connectors having a glass to metal
seal the recommended contact terminations are crimp, eyelet, solder, PCB and rounded.
NOTE 1 eyelet – the termination end is flattened and pierced with a hole to provide both mechanical retention of
the wire as well as solder attachment.
NOTE 2 rounded – terminal post with rounded (domed) end.

– 10 – 61076-2-101 © IEC:2012
NOTE 3 PCB – termination spills suitable for insertion into printed circuits.
3.2.2 Number of contacts or contact cavities
A-coding 2 to 17 contacts
B-coding 5 contacts
C-coding 3 to 6 contacts
D-coding 4 contacts
P-coding 5 contacts (4+PE)
3.3 Ratings and characteristics
For the ratings, see Table 1.
Table 1 – Ratings of connectors
Coding Style Contacts Rated voltage Rated current
a.c. or d.c. A
V
2 to 4 250
5 way 4
5 60
A-coding 8 way 6 to 8 30 2
12 way 9 to 12 30 1,5
17 way 13 to 17 30 1,5
B-coding 5 way 5 60 4
3 way (2 + PE) 3 (2 + PE) 250 4
4 way (3 + PE) 4 (3 + PE) 250 4
C-coding
5 way (4 + PE) 5 (4 + PE) 60 2
6 way (5 + PE) 6 (5 + PE) 30 2
a
D-coding 4 way 4 250 4
P-coding 5 way (4 + PE) 5 (4 + PE) 60 4
a
The M12 connectors with D-coding (4 way) are tested for use with frequencies up to 100 MHz.

Insulation resistance : 10 Ω min.
Climatic category : see Table 6
Contact spacing : see Clause 5
3.4 Marking
The marking of the connector and the package shall be in accordance with 2.7 of
IEC 61076-1.
3.5 Safety aspects
For safety aspects IEC 61984 shall be considered unless otherwise specified.

61076-2-101 © IEC:2012 – 11 –
4 Dimensional information
4.1 General
Throughout this standard dimensions are in mm. Drawings are shown in the first angle
projection. The shape of the connectors may deviate from those given in the following
drawings as long as the specified dimensions are not influenced.
Missing dimensions shall be chosen according to common characteristics and intended use.
4.2 Survey of styles and variants
For all connector styles with cables, the length L of the cable shall be agreed between
manufacturer and user. For connector styles with glass to metal seal the length E of the
contacts shall be agreed between manufacturer and user.
For interface dimensions see 4.3.
The interface dimensions of the female styles shall be chosen according to the common
characteristics of the male styles.
For reliable intermateability, the dimensions of the female connector body as detailed in
Annex A have to be met.
4.2.1 Fixed connectors
Table 2 shows styles of fixed connectors.
Table 2 – Styles of fixed connectors
Style Description
AM Tube insert, male contacts, mounting without thread
BM Tube insert, male contacts, mounting with thread M12 × 1
DM
Fixed connector, male contacts, mounting with thread M12 × 1, square flange front mounting
EM Fixed connector, male contacts, mounting with thread M12 × 1, with wire ends,
single hole mounting M16 × 1,5
FM
Fixed connector, male contacts, mounting with thread M12 × 1, with wire ends,
single hole mounting M20 × 1,5
GM Fixed connector, male contacts, mounting with thread M12 × 1, with wire ends,
single hole mounting M16 × 1,5, mounting orientation
HM Fixed connector, male contacts, mounting with thread M12 × 1, with wire ends,
single hole mounting M20 × 1,5, mounting orientation
WM Fixed connector, glass to metal seal, square flange front mounting, male contacts
XM Fixed connector, glass to metal seal, single hole front mounting, male contacts
YM Fixed connector, glass to metal seal, jam nut rear mounting, male contacts
ZM Fixed connector, glass to metal seal, through flange mounting, male contacts
EF
Fixed connector, female contacts, with wire ends, single hole mounting M16 × 1,5
FF
Fixed connector, female contacts, with wire ends, single hole mounting M20 × 1,5
GF Fixed connector, female contacts, with wire ends, single hole mounting M16 × 1,5, mounting orientation
HF
Fixed connector, female contacts, with wire ends, single hole mounting M20 × 1,5, mounting orientation
NOTE For new connectors according to this International Standard, Pg screw threads according to DIN 46320
(withdrawn) should not be applicable. For information on Pg threads, see Annex B.

– 12 – 61076-2-101 © IEC:2012
4.2.1.1 Style AM
Figure 1 shows a tube insert, with male contacts and a mounting with thread (thread on tube).

Figure 1 – Tube insert, male contacts, mounting without thread (thread on tube)
4.2.1.2 Style BM
Figure 2 shows a tube insert, with male contacts and a mounting with thread M12 × 1.

Figure 2 – Tube insert, male contacts, mounting with thread M12 × 1

61076-2-101 © IEC:2012 – 13 –
4.2.1.3 Style DM
Figure 3 shows a fixed connector, with male contacts, mounting with thread M12 × 1 and a
square flange front mounting.
Figure 3 – Fixed connector, male contacts, mounting with thread M12 × 1,
square flange front mounting
– 14 – 61076-2-101 © IEC:2012
4.2.1.4 Style EM
Figure 4 shows a fixed connector, with male contacts, mounting with thread M12 × 1, with wire
ends and a single hole mounting thread M16 × 1,5.

23 max. L = length of wire ends
∅18,2 max.
13 max.
Position free to flange
Sealing
IEC  1145/08
Figure 4 – Fixed connector, male contacts, mounting with thread M12 × 1,
with wire ends, single hole mounting thread M16 × 1,5
4.2.1.5 Style FM
Figure 5 shows a fixed connector, with male contacts, mounting with thread M12 × 1, with wire
ends and a single hole mounting thread M20 × 1,5.

23 max.
L = length of wire ends
∅26,2 max.
13 max.
Position free to flange
Sealing
IEC  1146/08
Figure 5 – Fixed connector, male contacts, mounting with thread M12 × 1,
with wire ends, single hole mounting thread M20 × 1,5

M20 × 1,5
M16 × 1,5
61076-2-101 © IEC:2012 – 15 –
4.2.1.6 Style GM
Figure 6 shows a fixed connector, male contacts, mounting with thread M12 × 1 with wire
ends, a single hole mounting thread M16 × 1,5 and a mounting orientation.

Figure 6 – Fixed connector, male contacts, mounting with thread M12 × 1 with wire
ends, single hole mounting thread M16 × 1,5, mounting orientation
4.2.1.7 Style HM
Figure 7 shows a fixed connector, with male contacts, a mounting with thread M12 × 1, with
wire ends, a single hole mounting thread M20 × 1,5 and a mounting orientation.

Figure 7 – Fixed connector, male contacts, mounting with thread M12 × 1, with wire
ends, single hole mounting thread M20 × 1,5, mounting orientation

– 16 – 61076-2-101 © IEC:2012
4.2.1.8 Style WM
Figure 8 shows a fixed connector, with glass to metal seal, square flange front mounting, male
contacts.
15,6 20,6
15,1
12,7 ± 0,25
(2 ×)
, 0,1 A
,
1)
E
A
3,40
∅
3,20
Position free
to flange
Panel cut out
15,1
(2 ×)
0,1 A
12,10
,
∅
12,15
A
3,30
∅
3,10 (4×)
IEC  410/12
1)
E length of contacts
NOTE Type of contact shall be crimp, eyelet, solder, PCB or rounded.
Figure 8 – Fixed connector, glass to metal seal, square
flange front mounting, male contacts

61076-2-101 © IEC:2012 – 17 –
4.2.1.9 Style XM
Figure 9 shows a fixed connector, with glass to metal seal, single hole front mounting
male contacts, which is intended to be welded or soldered into a panel or bulkhead.
12 ± 0,25
1)
E ∅ 22
Position free
Position free
to flange
to flange
IEC  411/12
1)
E length of contacts
NOTE Type of contact shall be crimp, eyelet, solder, PCB or rounded.
Figure 9 – Fixed connector, glass to metal seal, single hole
front mounting, male contacts
– 18 – 61076-2-101 © IEC:2012
4.2.1.10 Style YM
Figure 10 shows a fixed connector, with glass to metal seal, jam nut rear mounting, male
contacts.
17,6 ± 0,25
1)
E
Sealing
M14 × 1
Position free
to flange
Panel cut out
14,38
∅
14,12
IEC  412/12
1)
E length of contacts
NOTE Type of contact shall be crimp, eyelet, solder, PCB or rounded.
Figure 10 – Fixed connector, glass to metal seal,
jam nut rear mounting, male contacts
13,77
13,51
61076-2-101 © IEC:2012 – 19 –
4.2.1.11 Style ZM
Figure 11 shows a fixed connector, with glass to metal seal, through flange mounting, male
contacts.
27,5 19
1)
E
15,5 ± 0,25
M14 × 1
Sealing
Position free
to flange
IEC  413/12
1)
E length of contacts
NOTE Type of contact shall be crimp, eyelet, solder, PCB or rounded.
Figure 11 – Fixed connector, glass to metal seal, through flange
mounting, male contacts
4.2.1.12 Style EF
Figure 12 shows a fixed connector, female contacts, a mounting with thread M12 × 1, with
wire ends and a single hole mounting thread M16 × 1,5.

Figure 12 – Fixed connector, female contacts, mounting with thread M12 × 1,
with wire ends, single hole mounting thread M16 × 1,5

– 20 – 61076-2-101 © IEC:2012
4.2.1.13 Style FF
Figure 13 shows a fixed connector, with female contacts, a mounting with thread M12 × 1,
with wire ends and a single hole mounting thread M20 × 1,5.

Figure 13 – Fixed connector, female contacts, mounting with thread M12 × 1,
with wire ends, single hole mounting thread M20 × 1,5

61076-2-101 © IEC:2012 – 21 –
4.2.1.14 Style GF
Figure 14 shows a fixed connector, with female contacts, a mounting with thread M12 × 1,
with wire ends, a single hole mounting thread M16 × 1,5 and a mounting orientation.

L = length of wire ends
25 max.
13 max.
∅18,2 max.
Sealing
6 ± 0,3
Fixing nut
Position free to flange
IEC  1151/08
Figure 14 – Fixed connector, female contacts, mounting with thread M12 × 1,
with wire ends, single hole mounting thread M16 × 1,5, mounting orientation
4.2.1.15 Style HF
Figure 15 shows a fixed connector, with female contacts, mounting with thread M12 × 1, with
wire ends, a single hole mounting thread M20 × 1,5 and a mounting orientation.

L = length of wire ends
25 max.
13 max.
∅26,2 max.
Sealing
Fixing nut
6 ± 0,3
Position free to flange
IEC  1152/08
Figure 15 – Fixed connector, female contacts, mounting with thread M12 × 1,
with wire ends, single hole mounting thread M20 × 1,5, mounting orientation

M20 × 1,5
M16 × 1,5
– 22 – 61076-2-101 © IEC:2012
4.2.2 Free connectors
Table 3 shows styles of free connectors.
Table 3 – Styles of free connectors
Style Description
a
JM Rewireable connector, male contacts, straight version, with locking nut
a
KM Rewireable connector, male contacts, right angled version, with locking nut
a
LM Non-rewireable connector, male contacts, straight version, with locking nut
MM Non-rewireable connector, male contacts, right angled version, with locking nut
NM Non-rewireable connector, male contacts, right angled higher version, with locking nut
JF Rewireable connector, female contacts, straight version, with locking nut
KF Rewireable connector, female contacts, right angled version, with locking nut
LF Non-rewireable connector, female contacts, straight version, with locking nut
MF Non-rewireable connector, female contacts, right angled version, with locking nut
a
Knurled ring or hexagonal ring upon agreement.

4.2.2.1 Style JM
Figure 16 shows a rewireable connector, with male contacts, a straight version with locking
nut.
65 max.
1)
2)
Cable outlet
IEC  2348/03
1)
Cable outlet alternatively inside.
2)
Cable outlet diameter range upon agreement.
Figure 16 – Rewireable connector, male contacts, straight version, with locking nut
∅21 max.
61076-2-101 © IEC:2012 – 23 –
4.2.2.2 Style KM
Figure 17 shows a rewireable connector, with male contacts, a right angled version with
locking nut.
1)
Cable outlet alternatively inside.
2)
Cable out
...