SIST EN 3645-001:2022

SLOVENSKI STANDARD
01-november-2022
Nadomešča:
SIST EN 3645-001:2019
Aeronavtika - Konektorji, električni, okrogli, zaščiten kontakt, hitra spojka z
navojem, stalna delovna temperatura 175 °C ali 200 °C - 001. del: Tehnična
specifikacija
Aerospace series - Connectors, electrical, circular, scoop-proof, triple start threaded
coupling, operating temperature 175 °C or 200 °C continuous - Part 001: Technical
specification
Luft- und Raumfahrt - Elektrische Rundsteckverbinder, kontaktgeschützt, dreigängige
Gewinde-Schnellkupplung, Betriebstemperatur 175 °C oder 200 °C konstant - Teil 001:
Technische Lieferbedingungen
Série aérospatiale - Connecteurs électriques circulaires, à contacts protégés, à
accouplement par filetage, à pas rapide à trois filets, température d'utilisation 175 °C ou
200 °C continu - Partie 001 : Spécification technique
Ta slovenski standard je istoveten z: EN 3645-001:2022
ICS:
31.220.10 Vtiči in vtičnice, konektorji Plug-and-socket devices.
Connectors
49.060 Letalska in vesoljska Aerospace electric
električna oprema in sistemi equipment and systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 3645-001
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2022
EUROPÄISCHE NORM
ICS 49.060 Supersedes EN 3645-001:2019
English Version
Aerospace series - Connectors, electrical, circular, scoop-
proof, triple start threaded coupling, operating
temperature 175 °C or 200 °C continuous - Part 001:
Technical specification
Série aérospatiale - Connecteurs électriques Luft- und Raumfahrt - Elektrische Rundsteckverbinder,
circulaires, à contacts protégés, à accouplement par kontaktgeschützt, dreigängige Gewinde-
filetage, à pas rapide à trois filets, température Schnellkupplung, Betriebstemperatur 175 °C oder 200
d'utilisation 175 °C ou 200 °C continu - Partie 001 : °C konstant - Teil 001: Technische Lieferbedingungen
Spécification technique
This European Standard was approved by CEN on 22 November 2021.

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, Türkiye 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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 3645-001:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Description . 7
4.1 General. 7
4.2 Receptacle. 8
4.3 Plug . 8
4.4 Materials and surface treatment . 8
4.4.1 General. 8
4.4.2 Housing . 8
4.4.3 Contacts . 8
4.4.4 Non-metallic materials . 9
4.4.5 Surfaces treatments . 9
5 Design . 9
5.1 Housings . 9
5.2 Inserts . 10
6 Definition drawings and masses . 10
6.1 General. 10
6.2 Receptacle mating dimensions . 10
6.3 Plug mating dimensions . 13
6.4 Receptacle and plug polarization . 16
6.5 Dimensions of the rear part of the connectors . 17
6.5.1 Accessory interface dimensions . 17
6.5.2 Size 8 cavity - rear dimensions . 19
6.6 Contact arrangements . 20
6.7 Contact dimensions . 66
6.7.1 Removable contacts . 66
6.7.2 Fixed contacts . 66
7 Tests . 67
7.1 Tests according to EN 2591-100 . 67
7.2 Special tests . 81
7.2.1 Lanyard release connectors . 81
7.2.2 Resistance to fluids . 81
7.3 Gauges to test the holding force of the grounding spring system of the housing . 83
7.4 Gauges to test the stability of male contacts in insert . 84
8 Quality assurance . 85
8.1 General. 85
8.2 Qualification . 85
8.2.1 General. 85
8.2.2 For MIL-DTL-38999 QPL manufacturer . 86
8.2.3 For non MIL-DTL-38999 QPL manufacturer . 86
8.2.4 Sampling and definition of specimens . 87
8.2.5 Preparation of specimens . 88
8.2.6 Program of qualification tests . 89
8.3 Maintenance of qualification . 103
8.3.1 General . 103
8.3.2 Recognition of MIL-DTL-38999 . 103
8.3.3 Fuel resistant class . 104
8.3.4 Sampling distribution . 104
8.4 Routine tests during production . 104
8.5 Inspections . 105
8.6 Value added distributors . 105
9 Designation and marking . 105
9.1 General principle of designation . 105
9.2 Marking . 105
10 Delivery conditions . 106
11 Packaging . 106
12 Storage . 106
Bibliography . 107

European foreword
This document (EN 3645-001:2022) has been prepared by the Aerospace and Defence Industries
Association of Europe — Standardization (ASD-STAN).
After enquiries and votes carried out in accordance with the rules of this Association, this
document has received the approval of the National Associations and the Official Services of the
member countries of ASD, prior to its presentation to CEN.
This document shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by March 2023, and conflicting national standards shall be
withdrawn at the latest by March 2023.
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 3645-001 :2019.
The main changes with respect to the previous edition are listed in the following table.
Table X — Main changes introduced
prEN/EN Edition Publication Modification
Number Date
prEN 3645 P5 2021-12-01 Introduction of Hexavalent Chromium free (in both
-001 manufacturing process and final product) plating classes and
related compatibility testing with legacy Cadmium plated items
Addition of optional marking for insulators according to MIL
standard
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this document: 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,
Türkiye and the United Kingdom.
Introduction
This family of connectors is derived from MIL-DTL-38999 series III, with which it is intermateable and
interchangeable. It is particularly suitable for use in zones of severe environmental conditions on board
aircraft, applying EN 2282.
These connectors are distinguishable from MIL-DTL-38999 by:
 a compatibility with size 8 power and quadrax contacts;
 self-extinguishing materials;
 compatibility with reduced diameter cables;
 additional reinforced fuel resistant insert type;
 additional insert with grounded cavities.
1 Scope
This document specifies the general characteristics, the conditions for qualification, acceptance and
quality assurance, as well as the test programs and groups for threaded ring coupling circular
connectors, fire resistant, intended for use in a temperature range from -65 °C to 175 °C continuous or
200 °C continuous according to the classes.
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.
EN 2267-002, Aerospace series — Cables, electrical, for general purpose — Operating temperatures
between -55 °C and 260 °C — Part 002: General
EN 2346 (all parts), Aerospace series — Cable, electrical, fire resistant — Operating temperatures
between -65 °C and 260 °C
EN 2591-*, Aerospace series — Elements of electrical and optical connection — Test methods
EN 3155-001:2016, Aerospace series — Electrical contacts used in elements of connection — Part 001:
Technical specification
EN 3197, Aerospace series — Design and installation of aircraft electrical and optical interconnection
1)
systems
EN 3645-002, Aerospace series — Connectors, electrical, circular, scoop-proof, triple start threaded
coupling, operating temperature 175 °C or 200 °C continuous — Part 002: Specification of performance
and contact arrangements
EN 3909, Aerospace series — Test fluids and test methods for electrical and optical components and sub-
assemblies
2)
ISO 68-1, ISO general purpose screw threads — Basic profile — Part 1: Metric screw threads
2)
ISO 261, ISO general purpose metric screw threads — General plan
2)
ISO 262, ISO general purpose metric screw threads — Selected sizes for screws, bolts and nuts
ISO 965-2, ISO general purpose metric screw threads — Tolerances — Part 2: Limits of sizes for general
2)
purpose external and internal screw threads — Medium quality
ISO 27874, Metallic and other inorganic coatings — Electrodeposited gold and gold alloy coatings for
2)
electrical, electronic and engineering purposes — Specification and test methods

* All parts quoted in this document.
1)
Published as ASD-STAN Standard at the date of publication of this document by AeroSpace and Defence
industries Association of Europe — Standardization (ASD-STAN), https://www.asd-stan.org/.
2)
Published by: ISO International Organization for Standardization http://www.iso.ch/.
MIL-DTL-38999, Connectors, electrical, circular, miniature, high density, quick disconnect (bayonet,
threaded, and breech coupling), environment resistant, removable crimp and hermetic solder contacts,
3)
general specification for
MIL-DTL-38999/62, Sealing boot, size 8, pin or socket, shielded crimp contacts, electrical connector,
3)
circular, metric
3)
MIL-HDBK-454, General guidelines for electronic equipment
3)
MIL-STD-1373, Screw-thread, modified, 60°, stub, double
MIL-STD-1560, Defence logistics agency: Insert Arrangements for MIL-DTL-38999, MIL-DTL-27599, and
3)
SAE-AS29600 Series A Electrical Circular Connectors
TR 4865, Aerospace series — Suitable cable outlet to be mated on EN 3645 connector (layout type: 21R48)
4)
for the qualification of electrical contact product standards EN 3155-065 and EN 3155-083
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 2591-100 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• ISO Online browsing platform: available at https://www.iso.org/obp
• IEC Electropedia: available at https://www.electropedia.org/
4 Description
4.1 General
Different variants of materials, housings and contact arrangements are provided according to the
classes depending on the service conditions.
The pair of connectors is characterized:
 by shell-to-shell bottoming;
 by its triple threaded and self-locking coupling system;
 by plugs with shielding ring providing protection against radioelectrical interference;
 by the scoop-proof shells.
These connectors use the following contacts:
 crimped sizes 22, 20, 16, 12, 10 and 8;
 soldered (model Y) sizes 22, 20, 16 and 12;

3)
Published by: DEFENSE LOGISTICS AGENCY DLA Land and Maritime (US)
https://landandmaritimeapps.dla.mil/Programs/MilSpec/DocSearch.aspx.
4)
Published as ASD-STAN Technical Report at the date of publication of this document by AeroSpace and Defence
industries Association of Europe — Standardization (ASD-STAN), http://www.asd-stan.org/.
 coaxial crimped or soldered sizes 16, 12 and 8;
For arrangements comprising the letter G or
 triaxial crimped or soldered size 8; Q, all contacts are grounded to the receptacle
housing
 quadrax crimped size 8.
The receptacles and plugs contain either male contacts or female contacts.
The contacts fitted in the class Y receptacles are exclusively of the male solder type.
The connectors are polarized by means of keyways and keys; polarization shall be obtained before the
male contacts enter the insert of the female contacts and before the coupling ring is engaged. The
position of the keying arrangement is given in Table 7.
The visual check of coupling is obtained by masking of a red colour band on the receptacle.
4.2 Receptacle
The receptacle housing may be attached:
 square flange;
 nut, with sealing by O-ring at the attachment; round soldered or brazed flange for class Y connectors.
4.3 Plug
The coupling ring is permanently fitted to the plug and allows coupling and uncoupling of the
connectors. The lanyard release version may also be uncoupled by pulling on the lanyard.
The plug is fitted with a self-locking mechanism and a grounding spring device ensuring electrical
continuity between the coupled connector housings.
An anti-decoupling device shall be provided to maintain complete coupling.
4.4 Materials and surface treatment
4.4.1 General
When dissimilar metals are in close contact, adequate protection against corrosion shall be used for the
electromotive force of the cell not to exceed 0,25 V (see EN 3197).
4.4.2 Housing
The material of the housings for the connectors and fittings may be either aluminium alloy, passivated
stainless steel or composite. Aluminium alloy and composite shall be plated as defined by the class
(composite coupling rings and Hex nut may be unplated) (see EN 3645-002).
4.4.3 Contacts
Unless otherwise specified, the non-removable contacts shall be in ferrous alloy for class Y and in
copper alloy for the other classes.
They shall be gold-plated on an appropriate undercoat. Selective protection is authorised provided that
it is sufficient to ensure that the specified performance is achieved.
Measurement of the thickness of the protective plating shall be effected in accordance with ISO 27874.
NOTE In the past, the determination of coating thickness was described in ISO 4524-1, which has been withdrawn.
For removable contacts, see EN 3645-002.
4.4.4 Non-metallic materials
The materials used for insert, seals and grommets shall have a hardness and mechanical and electrical
characteristics consistent with the required use.
4.4.5 Surfaces treatments
Label chrome 6 free (not applicable for class W & J):
None of the hexavalent chromium compounds listed hereafter shall be added by any actor of the Supply
Chain or used in the manufacturing process.
The manufacturing process begins with the creation of the materials from which the design is made.
Manufacturing processes include treating (such as heat treating or plating), machining, moulding or
reshaping the material.
5)
Table 2 — Hexavalent chromium compound list
Substance name CAS number
Acids generated from chromium trioxide and their 7738-94-5
oligomers. Names of the acids and their oligomers:
13530-68-2
chromic acid, dichromic acid, oligomers of chromic
acid and dichromic acid.
Chromium trioxide 1333-82-0
Potassium dichromate 7778-50-9
Sodium chromate 7775-11-3
Sodium dichromate 7789-12-0
10588-01-9
Dichromium tris(chromate) 24613-89-6
Pentazinc chromate octahydroxide 49663-84-5
Potassium hydroxyoctaoxodizincatedichromate 11103-86-9
Strontium chromate 7789-06-2
5 Design
5.1 Housings
The connector housings shall be one-piece. They shall contain teeth at the rear over their entire periphery
and shall accommodate the rear accessories. The receptacle shall be fitted with a seal for sealing the
coupled housings.
Jam-nut receptacles shall contain an O-ring seal. The nut shall have holes for the passage of locking wire.
During coupling the grounding spring shall be engaged a minimum of 1,02 mm in the receptacle before
the contacts engage.
5) The CAS Registry Number, also referred to as CASRN or CAS Number, is a unique numerical identifier assigned
by the Chemical Abstracts Service, a division of the American Chemical Society.
Except for the triple start threads, which shall conform to standard MIL-STD-1373, threads shall
conform to standards ISO 68-1, ISO 261, ISO 262 and ISO 965-2.
The coupling ring shall be designed so that the male and female contacts engage when it is turned in a
clockwise direction and disengage when turned anticlockwise. The coupling threads may have a
lubricant applied during manufacture.
Full locking of the connectors shall occur at about 360°. On completion of tightening of the coupling
ring, mechanical contact shall exist between the receptacle and plug housings. A red band shall be
located on the receptacle so as to be visible when unmated and fully covered when completely mated.
The receptacle has five keyways which engage with corresponding keys on the plug. The major key is
fixed and is wider than the others. Polarization is ensured by the different positions which the minor
keys may take. The position of the insert is fixed relative to the major key.
A blue-coloured band indicating that the crimped contacts of the connectors are rear-releasable shall be
provided:
 in front of the flange on square flange receptacles;
 on the flange of jam-nut receptacles;
 on the coupling ring of plugs.
This band shall be positioned so that at least one is visible when the connectors are fitted and when
they are mated or unmated. Hermetic receptacles do not require blue colour band.
5.2 Inserts
The insert for contacts shall be non-removable; it shall be mechanically held in the housing. Sealing
shall be provided between the housing and insert.
The front face of the insert shall be such that sealing is ensured when the connectors are coupled.
The interfacial seal of the insert of the male contacts shall be bonded on the hard insert.
The grommet shall permit sealing for all cable diameters indicated in EN 3645-002 and shall not be
removable.
The mechanical contacts retention system shall be integrated in the hard insert.
The design of non-hermetic connectors shall permit individual installation of the contacts without
removal of the insert or grommet. Fitting and removal of the contacts shall be from the rear with the
tools specified in the contact product standards.
Contact position identification shall be permanent and contrasted on the front face of the insert or the
interfacial seal and on the rear face of the grommet as indicated in 6.6.
The marking shall not be recessed or raised on the surfaces providing a seal.
6 Definition drawings and masses
6.1 General
The general dimensions and the masses of receptacles, plugs and protective covers are given in the
product standards.
6.2 Receptacle mating dimensions
The mating dimensions of receptacles are shown in Figure 1 and details V and W as well as in Table 3 and
Table 4.
Dimensions and tolerances are in millimetres.

Key
a The distance between the front face of the shell and the point where the right end of a gauge with a diameter
equal to the nominal diameter of a male contact comes into contact with the elastic part of the female contact.
Figure 1 — Receptacle — Coupling dimensions

Table 3 — Receptacle — Dimensions (1 of 2)
Housing A dia. B dia. C dia. D dia. D dia. E dia. E dia. F dia.
size (except classes (classes J and (except classes (classes J and
J and M) M only) J and M) M only)
+ 0,13
max.   max.
−0,25
14,42 11,36 11,43 12,63 12,70
09 14,55 7,24 15,88
14,14 11,20 11,20 12,34 12,34
17,60 14,61 14,68 15,88 15,95
11 17,73 10,49 19,05
17,32 14,45 14,45 15,60 15,60
20,77 17,45 17,52 19,66 19,73
13 20,90 13,39 22,23
20,49 17,30 17,30 19,38 19,38
23,95 20,63 20,70 22,84 22,91
15 24,08 16,56 25,40
23,67 20,44 20,44 22,56 22,56
28,30 23,80 23,87 26,01 26,08
17 28,52 19,74 30,16
27,97 23,64 23,64 25,73 25,73
29,89 26,47 26,54 28,63 28,70
19 30,12 22,00 31,75
29,56 26,31 26,31 28,40 28,40
33,07 29,64 29,71 31,85 31,92
21 33,30 25,17 34,73
32,74 29,49 29,49 31,57 31,57
36,24 32,82 32,89 35,03 35,10
23 36,47 28,35 38,10
35,91 32,66 32,66 34,75 34,75
39,42 35,99 35,06 38,20 38,27
25 39,65 31,52 41,28
39,09 35,84 35,84 37,92 37,92
Table 3 — Receptacle — Dimensions (2 of 2)
Contact M dia. N dia. P dia. R dia. S dia.
size
max.
1,35 1,88 0,97 1,70
22 0,71
1,27 1,75 0,89 1,60
1,91 2,44 1,32 2,26
20 0,97
1,83 2,31 1,24 2,16
2,49 3,02 1,88 2,84
16 1,52
2,41 2,90 1,80 2,74
3,30 3,84 2,69 3,66
12 2,34
3,23 3,71 2,62 3,56
4,09 4,62 3,48 4,45
10 3,12
4,01 4,50 3,40 4,34
6,50 7,06 5,84 6,81
8 5,49
6,38 6,93 5,77 6,71
Table 4 — Receptacle — Thread
BB - Thread
a
External threading
Designation
Class 2A
Class 2A thread
See
Housing
Thread Apparent Actual External Diameter Diameter
b
size
Note
size pitch pitch diameter on side at thread end
inch inch inch max. min. max. min. max. min.
09 0,625 0 15,83 15,63 15,17 14,97 14,41 14,05
11 0,750 0 19,01 18,80 18,35 18,14 17,58 17,23
13 0,875 0 22,18 21,98 21,52 21,32 20,76 20,41
0,038 1
15 1,000 0 25,36 25,15 24,70 24,49 23,94 23,58
17 1,187 5 30,11 29,80 29,24 28,99 28,28 27,82
0,100 0,300
19 1,250 0 31,69 31,39 30,83 30,58 29,87 29,41
21 1,375 0 34,87 34,56 34,01 33,75 33,05 32,59
0,050 8
23 1,500 0 38,04 37,74 37,18 36,93 36,22 35,76
25 1,625 0 41,22 40,91 40,36 40,10 39,40 38,94
a
According to MIL-STD-1373.
b
Gauges for protected threads: it is permissible to increase the maximum limit for gauge diameters by the value specified
in this column.
6.3 Plug mating dimensions
The mating dimensions of plugs are shown in Figure 2 and detail X in details V and W of Figure 1 and in
Table 5 and Table 6.
Dimensions and tolerances are in millimetres.

Key
1 Spring finger
a The distance between the shell shoulder and the point where the right end of a gauge with a diameter equal to
the nominal diameter of a male contact comes into contact with the elastic part of the female contact.
b V and W: see Figure 1.
c Metallic
d Composite
e Over strap
Figure 2 — Plug — Coupling dimensions
Table 5 — Plug — Dimensions
Housing BB dia. C dia. G dia H dia. H dia. J dia. K dia. K dia. K dia. L dia.
1 1 1
size
min. between
between
front of keys
keys
+ 0,13 + 0,25 (classes J
keys
metallic composite over keys
(except
−0,25 −0,03 metallic and M
classes J
only)
and
and M)
composite
min  min./max. min.   min.
9,96 12,27 11,13 11,13
09 11,48 7,24 16,51 8,51 10,59 7,92
9,55 11,99 10,97 10,85
13,19 15,52 14,38 14,38
11 14,73 10,49 19,69 11,74 13,84 10,92
12,61 15,24 14,22 14,10
16,08 19,31 17,22 17,22
13 17,58 13,39 22,86 14,63 16,68 13,81
15,45 19,02 17,07 16,95
19,26 22,48 20,40 20,40
15 20,75 16,56 26,04 17,81 19,86 16,99
18,63 22,20 20,24 20,12
22,43 25,66 23,57 23,57
17 23,92 19,74 30,89 20,98 23,03 20,16
21,80 25,37 23,42 23,30
24,82 28,32 26,24 26,24
19 26,59 22,00 32,49 23,57 25,70 22,42
24,47 28,04 26,09 25,97
27,99 31,50 29,42 29,42
21 29,77 25,17 35,66 26,74 28,87 25,60
27,64 31,22 29,26 29,14
31,17 34,67 32,59 32,59
23 32,94 28,35 38,84 29,92 32,05 28,77
30,82 34,39 32,44 32,32
34,34 37,85 35,77 35,77
25 36,12 31,52 42,01 33,09 35,22 31,92
33,99 37,57 35,61 35,49
NOTE Diameter “K1” (dia. between keys) is for metallic and composite plugs, diameter “K (K min. – dia. front of keys)” is for
metallic and composite plugs, diameter “H” is for metallic plugs, and diameter “H (H min.)” is for composite plugs.
1 1
Table 6 — Plug — Thread
DD dia. - Thread
a
Designation Internal thread
Class 2B thread Class 2B
Housing
Thread Apparent Actual Internal Diameter Diameter at
size
size pitch pitch diameter on side thread end
inch  max. min. max. min. max. min.
09 0,625 0 14,96 14,71 15,46 15,21 16,38 15,97
11 0,750 0 18,14 17,88 18,64 18,38 19,55 19,15
13 0,875 0 21,31 21,06 21,81 21,56 22,73 22,32
15 1,000 0 24,49 24,23 24,99 24,73 25,90 25,50
17 1,187 5 0,100 0,300 28,94 28,63 29,60 29,29 30,77 30,26
19 1,250 0 30,53 30,22 31,19 30,88 32,35 31,85
21 1,375 0 33,70 33,40 34,36 34,06 35,53 35,02
23 1,500 0 36,88 36,57 37,54 37,23 38,70 38,20
25 1,625 0 40,05 39,75 40,71 40,41 41,88 41,37
a
According to MIL-STD-1373.
6.4 Receptacle and plug polarization
See Figure 3 and Table 7.
Dimensions and tolerances are in millimetres.

Receptacle Plug
Figure 3 — Receptacle and plug polarization
Table 7 — Position of the keys and keyways for receptacle and plug
Values in degrees
Housing Polarization
size index
a b c d
N 105 140 215 265
A 102 132 248 320
B 80 118 230 312
C 35 140 205 275
D 64 155 234 304
E 91 131 197 240
N 95 141 208 236
A 113 156 182 292
B 90 145 195 252
C 53 156 220 255
D 119 146 176 298
E 51 141 184 242
N 80 142 196 293
A 135 170 200 310
B 49 169 200 244
C 66 140 200 257
D 62 145 180 280
E 79 153 197 272
6.5 Dimensions of the rear part of the connectors
6.5.1 Accessory interface dimensions
The dimensions of the rear part of receptacles and plugs with threads for mounting accessories are
shown in Figure 4 and Table 8.
Optional design for Jam-nut receptacles
For metallic housing Classes J and M

For composite housing
Enlarged view of a tooth according to the projection of Y
the tooth on the maximum HH diameter (datum) Optional form
Key
1 Thread VV 5 Values for composite housing
1,6 µm
2 Surface of sealing Ra 6 Insulator
3 Sealing compound 7 7,11 min. clearance to minor thread diameter
4 Values for metallic housing 8 6,15 min. full thread.
Figure 4 — Dimensions of the rear part of the connectors

Table 8 — Dimensions of the rear part of the connectors
A dia. HH dia. NN PP dia. VV
Number of teeth Thread class
Housing
size
max. max. 6 g
− 0,15
09 7,59 10,57 12 8,80 M12 × 1
11 10,85 13,56 16 12,07 M15 × 1
13 13,74 16,58 20 14,96
M18 × 1
15 16,92 20,57 24 18,14
M22 × 1
17 20,09 23,57 28 21,31 M25 × 1
19 22,78 26,57 32 24,00 M28 × 1
21 25,96 29,57 36 27,18
M31 × 1
23 29,13 32,56 40 30,35
M34 × 1
25 32,31 35,56 44 33,53 M37 × 1
The axis of a tooth shall be in the medial plane of the main key or keyway.
Alignment tolerance of axis ± 1°.
6.5.2 Size 8 cavity - rear dimensions

Key
1 Rear face of the insulator
NOTE Applicable to contact arrangements 25N20.
Figure 5 — Shrink boot style
Key
1 Rear face of the insulator
NOTE Applicable to contact arrangements 11-01; 17-02; 17-22;
17-75; 19-12; 19-17; 19-31; 21-20; 21-48; 21 75; 23-05;
23-06; 25-07; 25-08; 25-17; 25(Q/L)20; 25-46
Figure 6 — Piggyback boot style
See MIL-DTL-38999/62 for the sealing boot which has to be used.
6.6 Contact arrangements
The contact arrangements in the inserts are specified by Figures 8 to 76, which show the front face of
male inserts.
The following tolerances are applicable to the inserts fitted in the housing:
 centre of the entry diameter of each female insert (diameter R, Figure 1):
∅ 0,38 D − 0,05 G − 0,15
 centre of the end of each male contact:
∅ 0,61 D − 0,05 G − 0,15
D and G are given in Figure 3.
Arrangements comprising coaxial, triaxial or quadrax contacts grounded to the shell are identified by
the letter G or Q.
Arrangement comprising Quadrax contacts are identified by letter Q when these contacts are grounded
to the shell, and by letter L when not grounded.

Arrangement comprising inserts for power contacts are identified by letter R.
Arrangement comprising reinforced inserts for fuel ingress are identified by letter K.
Arrangements comprising coaxial, triaxial or quadrax contacts grounded to the shell for fuel ingress are
identified by letter H
For contact symbol legend, see Table A.1 of EN 3155-001:2016.
Cavity size 8 for QUADRAX contacts
For all cavities receiving QUADRAX contact, the insert cavity keyway shall be oriented and aligned like
the main key of the connector. See Figure 7.
Tolerances are as follow:
Key
1 Connector main key axis
2 Insert cavity
Figure 7 — QUADRAX contacts
09G01 and 09Q01 09N35 09N98
Rating M Rating I
Rating N/A
6 contacts, size 22 3 contacts, size 20
1 triaxial contact, size 8
1 QUADRAX contact, size 8
X Y  X Y
Contact Contact
mm mm mm mm
1 +1,14 +1,98  A +1,65 +0,97
2 +1,98 −1,14  B 0 −1,91
3 0 −2,29  C −1,65 +0,97
4 −1,98 −1,14
5 −1,14 +1,98
NOTE No insert provided with the
arrangement.
6 0 0
Figure 8 Figure 9 Figure 10
11N01 11N02 and 11G02 11N05
Rating N Rating I Rating I
1 triaxial contact, size 8 2 contacts, size 16 5 contacts, size 20
11Q01 or 11L01
Rating N
1 QUADRAX contact, size 8
X Y  X Y
Contact Contact
mm mm mm mm
A +2,41 0  A +1,65 +1,42
B −2,41 0  B +2,87 −1,65
C 0 −3,30
D −2,87 −1,65
E −1,65 +1,42
Figure 11 Figure 12 Figure 13
11N12 11N35 11N98
Rating II Rating M Rating I
1 contact, size 12 13 contacts, size 22 6 contacts, size 20

Alternative marking:
X Y  X Y
Contact Contact
mm mm mm mm
1 0 +3,71 A 0 +3,30
2 +2,16 +3,00 B +3,30 0
3 +3,51 +1,14 C +1,65 −2,87
4 +3,51 −1,14 D −1,65 −2,87
5 +2,16 −3,00 E −3,30 0
6 0 −3,71 F 0 0
7 −2,16 −3,00
−3,51 −1,14
9 −3,51 +1,14
−2,16 +3,00
11 0 +1,42
12 +1,24 −0,89
13 −1,24 −0,89
Figure 14 Figure 15 Figure 16
11N99 11N04 13N04 and 13G04
Rating I Rating I Rating I
7 contacts, size 20 4 contacts, size 20 4 contacts, size 16

X Y  X Y  X Y
Contact Contact Contact
mm mm mm mm mm mm
A +1,65 +2,87  A +1,65 +1,65  A 0 +3,81
B +3,30 0  B +1,65 −1,65  B +3,71 +0,89
C +1,65 −2,87  C −1,65 −1,65  C 0 −2,11
D −1,65 −2,87  D −1,65 +1,65  D −3,71 +0,89
E −3,30 0
F
−1,65 +2,87
G 0 0
Figure 17 Figure 18 Figure 19
13N08 13N26 13N35
Rating I Rating M Rating M
8 contacts, size 20 2 contacts, size 12 22 contacts, size 22
6 contacts, size 22
X Y X Y X Y
Contact Contact Contact
mm mm mm mm mm mm
A +1,65 +3,99  A 0 +3,47  1 +1,14 +5,00
B +4,32 0  B +2,47 +4,34  2 +3,20 +4,01
C +3,05 −3,05  C +2,47 −4,34  3 +4,62 +2,24
D 0 −4,32  D 0 −3,47  4 +5,16 0
E  E  5
−3,05 −3,05 −2,47 −4,34 +4,62 −2,24
F 0  F  6
−4,32 −2,47 +4,34 +3,20 −4,01
G  1 0  7
−1,65 +3,99 +3,25 +1,14 −5,00
H 0  2 0  8
+1,12 −3,25 −1,14 −5,00
−3,20 −4,01
10 −4,62 −2,24
11 −5,16 0
12 −4,62 +2,24
13 −3,20 +4,01
14 −1,14 +5,00
15 +1,14 +2,72
16 +2,97 +0,66
17 +2,36 −1,91
18 0 −3,05
19 −2,36 −1,91
20 −2,97 +0,66
21 −1,14 +2,72
22 0 −0,76
Figure 20 Figure 21 Figure 22
13N98 15N05 and 15G05 15N15
Rating I Rating II Rating I
10 contacts, size 20 5 contacts, size 16 14 contacts, size 20
1 contact, size 16
X Y  X Y  X Y
Contact Contact Contact
mm mm mm mm mm mm
A 0 +4,95  A 0 +2,54  A +2,54 +5,72
B +3,18 +3,81  B +4,42 +0,61  B +5,13 +3,56
C +4,90 +0,76  C +2,39 −3,76  C +6,20 +0,36
D +4,17 −2,67  D −2,39 −3,76  D +5,54 −2,87
E 0 −3,43  E −4,42 +0,61  E +3,20 −5,31
F −4,17 − 2,67    F 0 −6,22
G −4,90 +0,76    G −3,20 −5,31
H −3,18 +3,81    H −5,54 −2,87
J +1,65 −0,38    J −6,20 +0,36
K −1,65 −0,38    K −5,13 +3,56
L −2,54 +5,72
M 0 +3,56
N +2,79 +1,02
P 0
−1,96
R
−2,79 +1,02
Figure 23 Figure 24 Figure 25
15N18 15N19
Rating I Rating I
18 contacts, size 20 19 contacts, size 20

X Y X Y
Contact Contact
mm mm mm mm
A +1,65 +6,40  A 0 +5,72
B +4,95 +2,87  B +3,30 +5,72
C +6,60 0  C +4,95 +2,87
D +4,95 −2,87  D +6,60 0
E +3,30 −5,72  E +4,95 −2,87
F 0  F
−5,72 +3,30 −5,72
G  G 0
−3,30 −5,72 −5,72
H  H
−4,95 −2,87 −3,30 −5,72
J 0  J
−6,60 −4,95 −2,87
K −4,95 +2,87 K −6,60 0
L −1,65 +6,40 L −4,95 +2,87
M −1,65 +2,87  M −3,30 +5,72
N +1,65 +2,87  N −1,65 +2,87
P + 3,30 0  P +1,65 +2,87
R +1,65 −2,87  R +3,30 0
S −1,65 −2,87  S +1,65 −2,87
T −3,30 0  T −1,65 −2,87
U 0 0  U −3,30 0
V 0 0
Figure 26 Figure 27
15N35 15N97
Rating M Rating I
37 contacts, size 22 8 contacts, size 20
4 contacts, size 16
X Y X Y  X Y
Contact Contact Contact
mm mm mm mm mm mm
1 +1,14 +6,65 20 +3,12 +3,02  A +1,65 +5,94
2 +3,12 +5,51 21 +4,32 +1,02  B +4,52 +4,52
3 +5,36 +4,06 22 +4,32 −1,27  C +5,84 −0,58
4 23  D
+6,45 +2,03 +3,12 −3,23 +4,52 −4,52
5 24  E
+6,76 −0,25 +1,14 −4,37 +1,65 −5,94
6 25  F
+6,27 −2,49 −1,14 −4,37 −2,26 −5,97
7 26  G
+5,08 −4,45 −3,12 −3,23 −5,26 −2,41
8 27  H
+3,30 −5,89 −4,32 −1,27 −5,94 +1,65
9 28  J
+1,14
...