Aerospace series - Connectors, electrical, circular, scoop-proof, triple start threaded coupling, operating temperature 175 °C or 200 °C continuous - Part 001: Technical specification

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.

Luft- und Raumfahrt - Elektrische Rundsteckverbinder, kontaktgeschützt, dreigängige Gewinde-Schnellkupplung, Betriebstemperatur 175 °C oder 200 °C konstant - Teil 001: Technische Lieferbedingungen

Dieses Dokument legt die allgemeinen Eigenschaften, die Bedingungen für Qualifikation, Annahme und Qualitätssicherung sowie Prüfprogramme und -gruppen für Rundsteckverbinder mit Gewinde-Schnell-kupplung, feuerbeständig, bestimmt für die Anwendung in einem Temperaturbereich von −65 °C bis 175 °C konstant oder 200 °C konstant, entsprechend den Klassen, fest.

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

La présente Norme spécifie les caractéristiques générales, les conditions de qualification, d’acceptation et d’assurance qualité, ainsi que les programmes et les groupes d’essais des connecteurs circulaires à accouplement par bague filetée, résistants au feu, utilisables dans une plage de températures comprises entre  65 °C et 175 °C continu, ou 200 °C continu suivant les classes.

Aeronavtika - Konektorji, električni, okrogli, zaščiten kontakt, hitra spojka z navojem, stalna delovna temperatura 175 °C ali 200 °C - 001. del: Tehnična specifikacija

Ta dokument določa splošne značilnosti, pogoje kvalifikacije, sprejemljivosti in zagotavljanja kakovosti ter preskusne programe in skupine za okrogle konektorje, priključene z navojnim obročkom, ognjevzdržne, za uporabo pri stalnih temperaturah med –65 °C in 175 °C ali pri stalni temperaturi 200 °C, odvisno od razreda.

General Information

Status
Withdrawn
Publication Date
20-Aug-2019
Technical Committee
Drafting Committee
Current Stage
9960 - Withdrawal effective - Withdrawal
Completion Date
07-Sep-2022

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SLOVENSKI STANDARD
SIST EN 3645-001:2019
01-november-2019
Nadomešča:
SIST EN 3645-001:2015
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 3645-001:2019
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
SIST EN 3645-001:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 3645-001:2019
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SIST EN 3645-001:2019
EN 3645-001
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2019
EUROPÄISCHE NORM
ICS 49.060 Supersedes EN 3645-001:2015
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 29 April 2019.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this

European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by

translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 3645-001:2019 E

worldwide for CEN national Members.
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EN 3645-001:2019 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

Introduction ..................................................................................................................................................................... 4

1 Scope .................................................................................................................................................................... 5

2 Normative references .................................................................................................................................... 5

3 Terms and definitions .................................................................................................................................... 6

4 Description ........................................................................................................................................................ 6

5 Design .................................................................................................................................................................. 8

6 Definition drawings and masses ................................................................................................................ 9

7 Tests .................................................................................................................................................................. 66

8 Quality assurance ......................................................................................................................................... 85

9 Designation and marking ........................................................................................................................103

10 Delivery conditions ....................................................................................................................................104

11 Packaging ......................................................................................................................................................104

12 Storage ............................................................................................................................................................104

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EN 3645-001:2019 (E)
European foreword

This document (EN 3645-001:2019) 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 Standard 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 European Standard shall be given the status of a national standard, either by publication of an identical

text or by endorsement, at the latest by February 2020, and conflicting national standards shall be

withdrawn at the latest by February 2020.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 3645-001:2015.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following

countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus,

Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,

Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North

Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United

Kingdom.
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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.
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EN 3645-001:2019 (E)
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 2282, Aerospace series — Characteristics of aircraft electrical supplies

EN 2346, Aerospace series — Fire resistant electrical cables — Dimensions, conductor resistance and mass

EN 2591-100 (all parts), Aerospace series — Elements of electrical and optical connection — Test methods —

Part 100: General

EN 3197, Aerospace series — Design and installation of aircraft electrical and optical interconnection

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

EN 9133, Aerospace series — Quality management systems — Qualification procedure for aerospace

standard parts

ISO 68-1, ISO general purpose screw threads — Basic profile — Part 1: Metric screw threads

ISO 261, ISO general-purpose metric screw threads — General plan

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: Limit of sizes for general

purpose external and internal screw threads — Medium quality

ISO 4524-1, Metallic coatings — Test methods for electrodeposited gold and gold alloy coatings —

Part 1: Determination of coating thickness

MIL-DTL-38999K, Connectors, electrical, circular, miniature, high density, quick disconnect (bayonet,

threaded, and breech coupling), environment resistant, removable crimp and hermetic solder contacts,

general specification for

1) Published by: DoD National (US) Mil. Department of Defense http://www.defenselink.mil/.

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MIL-DTL-38999/62, Sealing boot, size 8, pin or socket, shielded crimp contacts, electrical connector, circular,

metric
MIL-HDBK-454, General guidelines for electronic equipment
MIL-STD-1373, Screw-thread, modified, 60°, stub, double
MIL-STD-1560B, Department of Defense interface standard: insert arrangements for
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:

• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
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;
 coaxial crimped or soldered sizes 16, 12 and 8;
For arrangements comprising the letter G or
Q, all contacts are grounded to the receptacle
 triaxial crimped or soldered size 8;
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 5.

The visual check of coupling is obtained by masking of a red colour band on the receptacle.

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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 authorized 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 4524-1.

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.
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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.

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.
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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 Tables 1, 2

and 3.
Dimensions and tolerances are in millimetres.
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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
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Table 1 — Receptacle – Dimensions (1 of 2)
A dia. B dia. C dia. D dia. D dia. E dia. E dia. F dia.
Housing
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 1 — 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
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Table 2 — Receptacle – Thread
BB - Thread
External threading
Designation
Class 2A
Class 2A thread
See
Housing
Thread Apparent Actual External Diameter Diameter
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
According to MIL-STD-1373.

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

Tables 3 and 4.
Dimensions and tolerances are in millimetres.
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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
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Table 3 — 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

1 1
composite plugs.
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Table 4 — Plug – Thread
DD dia. - Thread
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
According to MIL-STD-1373.
6.4 Receptacle and plug polarization
See Figure 3 and Table 5.
Dimensions and tolerances are in millimetres.
Receptacle Plug
Figure 3 — Receptacle and plug polarization
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Table 5 — 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 6.
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Dimensions in millimetres
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
2 Surface of sealing Ra 1,6 µm 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
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SIST EN 3645-001:2019
EN 3645-001:2019 (E)
Table 6 — 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
Applicable to contact arrangements 25N20
Figure 5 — Shrink boot style
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SIST EN 3645-001:2019
EN 3645-001:2019 (E)
Key
1 Rear face of the insulator
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):
 centre of the end of each male contact:
D and G are given in Figure 3.

Arrangements comprising coaxial, triaxial or quadrax contacts grounded to the shell (identified by the

letter G or Q) are not applicable to plugs.

Arrangement comprising Quadrax contacts are identified by letter Q when these contacts are grounded to

the shell, and by letter L when not grounded.
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SIST EN 3645-001:2019
EN 3645-001:2019 (E)

Arrangement comprising reinforced inserts for power contacts are identified by letter R.

Arrangement comprising reinforced inserts for fuel ingress are identified by letter K.

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
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SIST EN 3645-001:2019
EN 3645-001:2019 (E)
09G01 and 09Q01 09N35 09N98
Rating N/A Rating M Rating I
1 triaxial contact, size 8 6 contacts, size 22 3 contacts, size 20
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 B 0
+ 1,98 − 1,14 − 1,91
3 0 C
− 2,29 − 1,65 + 0,97
4
− 1,98 − 1,14
NOTE No insert provided with the
− 1,14 + 1,98
arrangement.
6 0 0
Figure 8 Figure 9 Figure 10
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SIST EN 3645-001:2019
EN 3645-001:2019 (E)
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 0 A
+ 2,41 + 1,65 + 1,42
B 0 B
− 2,41 + 2,87 − 1,65
C 0
− 3,30
D − 2,87 − 1,65
E − 1,65 + 1,42
Figure 11 Figure 12 Figure 13
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SIST EN 3645-001:2019
EN 3645-001:2019 (E)
11N12 11N35 11N98
Rating II Rating M Rating I
1 contact, size 12 13 contacts, size 22 6 contacts, size 20
X Y X Y
Contact Contact
mm mm mm mm
...

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