oSIST prEN 3660-001:2026

Aerospace series - Cable outlet accessories for circular and rectangular electrical and optical connectors - Part 001: Technical specification

This document defines cable outlet accessories for use with circular and rectangular, electrical and optical connectors on aerospace equipment. These may be sealed or unsealed and include accessories suitable for the suppression of radio frequency and electromagnetic interference.
This document is used in conjunction with circular and rectangular electrical and optical connectors for varying temperature ranges, environmental conditions, fire resistant and non-fire resistant applications as designated in the product standards.

Luft- und Raumfahrt - Endgehäuse für elektrische und optische Rund- und Rechtecksteckverbinder - Teil 001: Technische Lieferbedingungen

Dieses Dokument legt Endgehäuse für elektrische und optische Rund- und Rechtecksteckverbinder für die Anwendung in der Luft- und Raumfahrt fest. Diese Endgehäuse dürfen abgedichtet oder nicht abgedichtet sein und schließen Bauformen ein, die zur Unterdrückung von Hochfrequenz- und elektromagnetischen Störungen geeignet sind.
Endgehäuse nach diesem Dokument finden ihren Einsatz an elektrischen und optischen Rund- und Rechteck
steckverbindern für unterschiedliche Temperaturbereiche, Umweltbedingungen, feuerbeständige und nicht feuerbeständige Anwendungen, wie in den Produktnormen angegeben.

Série aérospatiale - Accessoires arrière pour connecteurs circulaires et rectangulaires électriques et optiques - Partie 001 : Spécification technique

Le présent document définit les accessoires arrière destinés à être utilisés avec des connecteurs circulaires et rectangulaires, électriques et optiques sur des équipements aérospatiaux. Ceux-ci peuvent être étanches ou non étanches et comprendre les accessoires appropriés pour la suppression des interférences de radiofréquences et électromagnétiques.
Le présent document est utilisé conjointement avec des connecteurs circulaires et rectangulaires, électriques et optiques dans différentes plages de températures, différentes conditions environnementales et pour diverses applications de tenue au feu ou non telles que désignées dans les normes de produits.

Aeronavtika - Dodatki za okrogle in pravokotne električne in optične konektorje - 001. del: Tehnična specifikacija

General Information

• Status: Not Published
• Public Enquiry End Date: 30-Jan-2026
• ICS: 31.220.99 - Other electromechanical components
• ICS: 49.060 - Aerospace electric equipment and systems
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 01-Dec-2025
• Due Date: 20-Apr-2026
• Ref Project: prEN 3660-001 - Aerospace series - Cable outlet accessories for circular and rectangular electrical and optical connectors - Part 001: Technical specification

Relations

• Revises: SIST EN 3660-001:2019 - Aerospace series - Cable outlet accessories for circular and rectangular electrical and optical connectors - Part 001: Technical specification
• Effective Date: 03-May-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-januar-2026
Aeronavtika - Dodatki za okrogle in pravokotne električne in optične konektorje -
001. del: Tehnična specifikacija
Aerospace series - Cable outlet accessories for circular and rectangular electrical and
optical connectors - Part 001: Technical specification
Luft- und Raumfahrt - Endgehäuse für elektrische und optische Rund- und
Rechtecksteckverbinder - Teil 001: Technische Lieferbedingungen
Ta slovenski standard je istoveten z: prEN 3660-001
ICS:
31.220.99 Druge elektromehanske Other electromechanical
komponente components
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.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2025
ICS 49.060 Will supersede EN 3660-001:2019
English Version
Aerospace series - Cable outlet accessories for circular and
rectangular electrical and optical connectors - Part 001:
Technical specification
Luft- und Raumfahrt - Endgehäuse für elektrische und
optische Rund- und Rechtecksteckverbinder - Teil 001:
Technische Lieferbedingungen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee ASD-
STAN.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 3660-001:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 6
4 Conditions of use . 6
4.1 General. 6
4.2 Accessory styles . 6
4.3 Material and finish classes . 7
5 Design and description . 8
5.1 Design . 8
5.2 Materials . 8
5.3 Finish . 8
5.4 Threads . 8
6 Dimensions and mass . 8
7 Operation . 8
8 Tests . 8
9 Quality assurance . 11
9.1 General. 11
9.2 Conditions for qualification . 11
9.2.1 Initial qualification . 11
9.2.2 Sampling and definition of specimens . 12
9.2.3 Preparation of specimens . 12
9.2.4 Programme of qualification tests . 12
9.2.5 Extension of qualification . 16
9.3 Conditions for acceptance testing and inspection . 16
9.4 Quality control . 16
9.5 Maintenance of qualification . 16
10 Designation and marking . 17
10.1 Designation of cable outlet accessory . 17
10.2 Marking . 17
11 Delivery condition . 17
12 Packaging . 17
13 Storage . 17
Bibliography . 19
European foreword
This document (prEN 3660-001:2025) has been prepared by 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-STAN, prior to its presentation to CEN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 3660-001:2019.
This document includes the following significant technical changes with respect to EN 3660-001:2019:
— addition of classes V and D (tin-zinc): Subclause 4.3 description of material and finish, tests in Table 4,
Table 5 to Table 13;
— addition of Table 2 “Hexavalent chromium compound list”.
1 Scope
This document defines cable outlet accessories for use with circular and rectangular, electrical and optical
connectors on aerospace equipment. These may be sealed or unsealed and include accessories suitable
for the suppression of radio frequency and electromagnetic interference.
This document is used in conjunction with circular and rectangular electrical and optical connectors for
varying temperature ranges, environmental conditions, fire resistant and non-fire resistant applications
as designated in the product standards.
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 2267-010, Aerospace series — Cables, electrical, for general purpose — Operating temperatures
between −55 °C and 260 °C — Part 010: DR family, single UV laser printable — Product standard
EN 2591-100, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 100: General
EN 2591-101, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 101: Visual examination
EN 2591-102, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 102: Examination of dimensions and mass
EN 2591-205, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 205: Housing (shell) electrical continuity
EN 2591-212, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 212: Surface transfer impedance
EN 2591-213, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 213: Shielding effectiveness from 100 MHz to 1 GHz
EN 2591-214, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 214: Lightning strike, current and voltage pulse
EN 2591-301, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 301: Endurance at temperature
EN 2591-305, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 305: Rapid change of temperature
EN 2591-306, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 306: Mould growth
EN 2591-307, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 307: Salt mist
EN 2591-308, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 308: Sand and dust
EN 2591-314, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 314: Immersion at low air pressure
EN 2591-315, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 315: Fluid resistance
EN 2591-316, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 316: Ozone resistance
EN 2591-317, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 317: Flammability
EN 2591-402, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 402: Shock
EN 2591-403, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 403: Sinusoidal and random vibration
EN 2591-406, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 406: Mechanical endurance
EN 2591-408, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 408: Mating and unmating forces
EN 2591-420, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 420: Mechanical strength of rear accessories
EN 2591-422, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 422: Locking wire hole strength
EN 2591-423, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 423: Connector rear accessories thread strength
EN 2591-513, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 513: Magnetic permeability
EN 2591-515, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 515: Hydrolytic stability
EN 3660-002, Aerospace series — Cable outlet accessories for circular and rectangular electrical and
optical connectors — Part 002: Index of product standards
EN 60529, Degrees of protection provided by enclosures (IP Code)
IEC 60050-581, International Electrotechnical Vocabulary — Part 581: Electromechanical components for
electronic equipment
ISO 261, ISO general purpose metric screw threads — General plan
ISO 263, ISO inch screw threads — General plan and selection for screws, bolts and nuts — Diameter range
0,06 to 6 in
ISO 965-1, ISO general purpose metric screw threads — Tolerances — Part 1: Principles and basic data
ISO 2813, Paints and varnishes — Determination of gloss value at 20°, 60° and 85°
ISO/CIE 11664-4, Colorimetry — Part 4: CIE 1976 L*a*b* colour space
MIL-HDBK-454C, General Guidelines for Electronic Equipment
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050-581 and the following
apply.
ISO and IEC maintain terminology 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/
3.1
backshell
non-preferred term, use cable outlet accessory
3.2
cable screen termination
device for terminating the cable screen to the cable outlet and giving electrical continuity
3.3
cable tie
flexible strap or cord for securing a cable bundle to a cable outlet
3.4
coupling nut
an accessory or part of a component which secures the cable outlet to the body of the connector
4 Conditions of use
4.1 General
The conditions of use shall be in accordance with the individual product standard listed in EN 3660-002.
4.2 Accessory styles
Accessory styles shall be in accordance with Table 1.
Table 1 — Accessory styles
Style Description
A Cable outlet, unsealed
B Cable outlet, sealed
C Cable outlet, shielded, unsealed
D Cable outlet, shielded, sealed
E Conduit adapter, unsealed
Published by Department of Defense (DoD), available at: https://assist.dla.mil/online/start/.
Style Description
F Conduit adapter, sealed
G Adaptor (misc. incl. rectangular), unsealed
H Adaptor (misc. incl. rectangular), sealed
J Cable outlet, for heat shrinkable boot, sealed
K Cable outlet, for heat shrinkable boot, shielded, sealed
Z Various components, tools
4.3 Material and finish classes
Label chrome 6 free (not applicable for class W and J):
None of the hexavalent chromium compounds listed in Table 2 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.
Table 2 — Hexavalent chromium compound list
Substance name CAS Number
Acids generated from chromium trioxide and their oligomers. Names of the
7738–94–5
acids and their oligomers: Chromic acid, Dichromic acid, Oligomers of
13530–68–2
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
Material and finish classes shall be in accordance with Table 3.
Table 3 — Material and finish classes
Class Temperature range Material/finish
A −65 °C to 175 °C Aluminium/black anodised
J −65 °C to 175 °C Non-metallic/olive drab cadmium plated
K −65 °C to 260 °C Stainless steel/passivated
N −65 °C to 200 °C Aluminium/electroless nickel plated
Class Temperature range Material/finish
P −65 °C to 175 °C Non-metallic/unplated
T −65 °C to 175 °C Aluminium/Nickel PTFE(Polytetrafluoroethylene
(PTFE)) plated
W −65 °C to 175 °C Aluminium/olive drab cadmium plated
Z −65 °C to 175 °C Aluminium/Zinc nickel plated
V −65 °C to 175 °C Aluminium/Tin zinc plated (non reflective)
D −65 °C to 175 °C Aluminium/Tin zinc plated (dark/non reflective)
5 Design and description
5.1 Design
Cable outlet accessories shall be designed and constructed to withstand normal handling incident to
installation and maintenance in service. They shall
...