EN 3646-006:2026
(Main)Aerospace series - Connectors, electrical, circular, bayonet coupling, operating temperature 175 °C or 200 °C continuous - Part 006: Receptacle, hermetic, jam-nut mounting - Product standard
Aerospace series - Connectors, electrical, circular, bayonet coupling, operating temperature 175 °C or 200 °C continuous - Part 006: Receptacle, hermetic, jam-nut mounting - Product standard
This document specifies the characteristics of hermetic jam-nut mounted receptacles in the family of bayonet coupling circular connectors, intended for use in an operating temperature range of – 65 °C to 175 °C or 200 °C continuous.
It is applicable to models specified in Table 4.
For plugs and protective covers, see EN 3646-008 and EN 3646-009 respectively.
Luft- und Raumfahrt - Elektrische Rundsteckverbinder mit Bajonettkupplung, Betriebstemperatur 175 °C oder 200 °C konstant - Teil 006: Hermetischer fester Steckverbinder mit Mutternbefestigung - Produktnorm
No Scope available
Série aérospatiale - Connecteurs électriques circulaires à accouplement par baïonnettes, température d'utilisation 175 °C ou 200 °C continu - Partie 006 : Embase hermétique à fixation par écrou -Norme de produit
Le présent document spécifie les caractéristiques des embases hermétiques à fixation par écrou de la famille des connecteurs circulaires à accouplement par baïonnettes, destinés à une utilisation dans une plage de températures comprises entre −65 °C et 175 °C ou 200 °C continu.
Il est applicable au modèle spécifié dans le Tableau 4.
Pour les fiches et les bouchons de vol, voir respectivement l’EN 3646-008 et l’EN 3646-009.
Aeronavtika - Konektorji, električni, okrogli, bajonetno sklapljanje, stalna delovna temperatura 175 °C ali 200 °C - 006. del: Podloga, hermetična, pritrjena z matico - Standard za proizvod
General Information
- Status
- Not Published
- Publication Date
- 24-Feb-2026
- Technical Committee
- ASD-STAN - Aerospace
- Current Stage
- 6055 - CEN Ratification completed (DOR) - Publishing
- Start Date
- 03-Nov-2025
- Completion Date
- 03-Nov-2025
Relations
- Effective Date
- 25-Oct-2023
Overview
FprEN 3646-006 is a CEN draft product standard for hermetic jam‑nut mounted receptacles in the aerospace family of circular electrical connectors with bayonet coupling. It defines the characteristics, dimensions and marking for receptacles designed to operate continuously in the temperature range –65 °C to 175 °C or 200 °C. The document updates and supersedes EN 3646‑006:2018 and aligns with the broader EN 3646 series for high‑temperature aerospace connectors.
Key topics and technical requirements
- Scope & models: Applies to the receptacle models listed in Table 4 (examples include passivated stainless‑steel housings with solder contacts rated to 200 °C).
- Dimensions & tolerances: Detailed flange, panel cut‑out and interface dimensions are specified (Figure 1, Figure 2, Tables 1–3). Dimensions are in millimetres and apply after surface treatment.
- Material & surface treatment: Materials and finishes are prescribed (see Table 4) to ensure hermeticity and high‑temperature performance.
- Mechanical requirements:
- Tightening torque for the jam‑nut attachment is specified by housing size (e.g., size 08 = 7 N·m, size 16 = 18 N·m, size 24 = 29 N·m ±10%).
- Optional features include three or six equally spaced holes in the jam nut for locking wire (new in this revision).
- Interface & threads: Interface mating dimensions refer to EN 3646‑001; thread dimensions comply with ISO 3161 (UNJ threads).
- Marking & packaging: Product marking must include the manufacturer’s part number (identity block), date of manufacture (year, week) and maker’s name or trademark. Packaging must mirror these identifiers.
- Performance & contact arrangements: Main electrical and environmental characteristics are governed by EN 3646‑002 and EN 3646‑001 (technical specification).
Applications and users
This product standard is essential for:
- Aerospace component manufacturers designing or producing hermetic circular receptacles for engines, high‑temperature avionics, thermal control systems and space vehicles.
- Systems engineers and procurement specialists who need to specify compliant connectors for harsh environments.
- Quality assurance and test laboratories verifying dimensional, mechanical and marking requirements.
- Maintenance, repair and overhaul (MRO) organizations that replace or validate connector compatibility.
Typical applications include high‑temperature aircraft and spacecraft electrical interfaces where hermetic sealing and reliable bayonet coupling are required.
Related standards
- EN 3646‑001 - Technical specification (interface and general requirements)
- EN 3646‑002 - Performance and contact arrangements
- EN 3646‑008 - Plug (product standard)
- EN 3646‑009 - Protective cover for receptacle
- ISO 3161 - UNJ threads
Keywords: FprEN 3646‑006, hermetic jam‑nut receptacle, aerospace connectors, bayonet coupling, high‑temperature electrical connectors, UNJ threads, connector panel cut‑out.
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Frequently Asked Questions
EN 3646-006:2026 is a draft published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Connectors, electrical, circular, bayonet coupling, operating temperature 175 °C or 200 °C continuous - Part 006: Receptacle, hermetic, jam-nut mounting - Product standard". This standard covers: This document specifies the characteristics of hermetic jam-nut mounted receptacles in the family of bayonet coupling circular connectors, intended for use in an operating temperature range of – 65 °C to 175 °C or 200 °C continuous. It is applicable to models specified in Table 4. For plugs and protective covers, see EN 3646-008 and EN 3646-009 respectively.
This document specifies the characteristics of hermetic jam-nut mounted receptacles in the family of bayonet coupling circular connectors, intended for use in an operating temperature range of – 65 °C to 175 °C or 200 °C continuous. It is applicable to models specified in Table 4. For plugs and protective covers, see EN 3646-008 and EN 3646-009 respectively.
EN 3646-006:2026 is classified under the following ICS (International Classification for Standards) categories: 49.060 - Aerospace electric equipment and systems. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 3646-006:2026 has the following relationships with other standards: It is inter standard links to EN 3646-006:2018. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 3646-006:2026 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN 3646-006:2024
01-maj-2024
Aeronavtika - Konektorji, električni, okrogli, bajonetno sklapljanje, stalna delovna
temperatura 175 °C ali 200 °C - 006. del: Podloga, hermetična, pritrjena z matico -
Standard za proizvod
Aerospace series - Connectors, electrical, circular, bayonet coupling, operating
temperature 175 °C or 200 °C continuous - Part 006: Receptacle, hermetic, jam-nut
mounting - Product standard
Luft- und Raumfahrt - Elektrische Rundsteckverbinder mit Bajonettkupplung,
Betriebstemperatur 175 °C oder 200 °C konstant - Teil 006: Hermetischer fester
Steckverbinder mit Mutternbefestigung - Produktnorm
Série aérospatiale - Connecteurs électriques circulaires à accouplement par
baïonenettes, température d'utilisation 175 °C ou 200 °C continu - Partie 006: Embasse
hermétique à fixation par écrou - Norme de produit
Ta slovenski standard je istoveten z: prEN 3646-006
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
oSIST prEN 3646-006:2024 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
oSIST prEN 3646-006:2024
oSIST prEN 3646-006:2024
DRAFT
EUROPEAN STANDARD
prEN 3646-006
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2024
ICS 49.060 Will supersede EN 3646-006:2018
English Version
Aerospace series - Connectors, electrical, circular, bayonet
coupling, operating temperature 175 °C or 200 °C
continuous - Part 006: Receptacle, hermetic, jam-nut
mounting - Product standard
Série aérospatiale - Connecteurs électriques circulaires Luft- und Raumfahrt - Elektrische Rundsteckverbinder
à accouplement par baïonenettes, température mit Bajonettkupplung, Betriebstemperatur 175 °C oder
d'utilisation 175 °C ou 200 °C continu - Partie 006: 200 °C konstant - Teil 006: Hermetischer fester
Embasse hermétique à fixation par écrou - Norme de Steckverbinder mit Mutternbefestigung - Produktnorm
produit
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
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 3646-006:2024 E
worldwide for CEN national Members.
oSIST prEN 3646-006:2024
prEN 3646-006:2024 (E)
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Required characteristics . 4
4.1 Dimensions and mass . 4
4.2 Tightening torque of attachment nut . 6
4.3 Panel cut-out . 6
4.4 Material and surface treatment . 7
4.5 Main general characteristics . 7
4.6 Possible combinations of plugs and receptacles . 7
5 Designation . 8
6 Marking . 8
6.1 General. 8
6.2 Marking on the product . 8
6.3 Marking on the individual packaging . 8
7 Technical specification . 9
Bibliography .
...
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