kSIST FprEN 3646-004:2025
(Main)Aerospace series - Connectors, electrical, circular, bayonet coupling, operating temperature 175 °C continuous - Part 004: Receptacle, jam-nut mounting - Product standard
Aerospace series - Connectors, electrical, circular, bayonet coupling, operating temperature 175 °C continuous - Part 004: Receptacle, jam-nut mounting - Product standard
This document specifies the characteristics of the jam-nut mounted receptacles of 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.
This document applies to models specified in Table 4.
For contacts, filler plugs and rear accessories associated with this receptacle, see EN 3646 002. 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 004: Fester Steckverbinder mit Mutternbefestigung - Produktnorm
No Scope available
Série aérospatiale - Connecteurs électriques circulaires à accouplement par baïonenettes, température d'utilisation 175 °C ou 200 °C continu - Partie 004 : Embasse à fixation par écrou - Norme de produit
Le présent document spécifie les caractéristiques des embases 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 aux modèles spécifiés dans le Tableau 4.
Pour les contacts, les obturateurs et les accessoires arrière associés à cette embase, voir l’EN 3646 002. Pour les fiches et les bouchons de vol, voir respectivement l’EN 3646 008 et l’EN 3646 009.
Aeronavtika - Konektorji, električni, okrogli, z bajonetnim spojem, neprekinjena delovna temperatura 175 °C - 004. del: Vtičnica, vgradnja z matico - Standard izdelka
General Information
- Status
- Not Published
- Public Enquiry End Date
- 11-Jun-2024
- Technical Committee
- I13 - Imaginarni 13
- Current Stage
- 5020 - Formal vote (FV) (Adopted Project)
- Start Date
- 18-Aug-2025
- Due Date
- 06-Oct-2025
- Completion Date
- 18-Aug-2025
Relations
- Effective Date
- 25-Oct-2023
Overview
FprEN 3646-004 is the CEN product standard for jam-nut mounted receptacles in the aerospace series of electrical circular connectors with bayonet coupling. The standard covers receptacle characteristics intended for continuous operating temperatures of −65 °C to 175 °C or 200 °C, and applies to the models listed in the document's model table. It is published as a draft European standard and will supersede EN 3646-004:2015 when adopted.
This product standard is part of the EN 3646 family and references related technical and performance specifications (see Related Standards). It is intended to ensure interchangeability, reliable high-temperature operation, and standardized mounting for aerospace applications.
Key Topics
- Scope and applicability: Jam-nut mounted receptacles of the bayonet coupling circular connector family, for specified temperature ranges and model types.
- Dimensions and mass: Interface mating, rear dimensions and tolerances are defined by figures and tables in the standard; dimensions are given in millimetres and apply after surface treatment.
- Panel cut-out and mounting: Recommended panel cut-out dimensions and panel interface details are specified to ensure correct jam-nut installation and secure panel mounting.
- Tightening torque: The standard specifies tightening torques for the attachment nut by housing size to ensure correct clamping and mechanical integrity.
- Materials and finishes: Material and surface treatment requirements are identified for the receptacle housing and related parts.
- Marking and designation: Requirements for product marking (manufacturer part number, date of manufacture, name/mark) and packaging identification are given to support traceability.
- Design updates: Notable changes in the draft include allowance for six equally spaced holes in the jam nut for locking wire and an updated figure for the receptacle.
Applications
This standard is targeted at aerospace electric equipment and systems where high-temperature continuous operation and robust mechanical mounting are required. Typical applications include:
- Aircraft and spacecraft electrical harness interfaces
- High-temperature avionics or engine bay connectors
- Systems requiring standardized, interchangeable receptacles with jam-nut panel mounting
Benefits include improved interchangeability, defined mechanical and thermal performance, and clear requirements for mounting, marking and accessory compatibility.
Related Standards
- EN 3646-001 - Technical specification for the connector family
- EN 3646-002 - Performance specification and contact arrangements (contacts, filler plugs, rear accessories)
- EN 3646-008 - Plug product standard
- EN 3646-009 - Protective cover for receptacle
- EN 3155-002 - Electrical contacts list and utilisation
- ISO 3161 - UNJ thread general requirements
For procurement, design and verification, refer to the full FprEN 3646-004 text and the referenced parts for complete dimensional tables, torque values, material treatments and model lists.
Frequently Asked Questions
kSIST FprEN 3646-004:2025 is a draft published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Connectors, electrical, circular, bayonet coupling, operating temperature 175 °C continuous - Part 004: Receptacle, jam-nut mounting - Product standard". This standard covers: This document specifies the characteristics of the jam-nut mounted receptacles of 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. This document applies to models specified in Table 4. For contacts, filler plugs and rear accessories associated with this receptacle, see EN 3646 002. For plugs and protective covers, see EN 3646 008 and EN 3646 009 respectively.
This document specifies the characteristics of the jam-nut mounted receptacles of 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. This document applies to models specified in Table 4. For contacts, filler plugs and rear accessories associated with this receptacle, see EN 3646 002. For plugs and protective covers, see EN 3646 008 and EN 3646 009 respectively.
kSIST FprEN 3646-004:2025 is classified under the following ICS (International Classification for Standards) categories: 31.220.10 - Plug-and-socket devices. Connectors; 49.060 - Aerospace electric equipment and systems. The ICS classification helps identify the subject area and facilitates finding related standards.
kSIST FprEN 3646-004:2025 has the following relationships with other standards: It is inter standard links to SIST EN 3646-004:2016. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
kSIST FprEN 3646-004:2025 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 3646-004:2024
01-junij-2024
Aeronavtika - Konektorji, električni, okrogli, z bajonetnim spojem, neprekinjena
delovna temperatura 175 °C - 004. del: Vtičnica, vgradnja z matico - Standard
izdelka
Aerospace series - Connectors, electrical, circular, bayonet coupling, operating
temperature 175 °C continuous - Part 004: Receptacle, jam-nut mounting - Product
standard
Luft- und Raumfahrt - Elektrische Rundsteckverbinder mit Bajonettkupplung,
Betriebstemperatur 175 °C oder 200 °C konstant - Teil 004: Fester Steckverbinder mit
Mutternbefestigung - Produktnorm
Série aérospatiale - Connecteurs électriques circulaires à accouplement par
baïonenettes, température d'utilisation 175 °C ou 200 °C continu - Partie 004 : Embasse
à fixation par écrou - Norme de produit
Ta slovenski standard je istoveten z: prEN 3646-004
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 3646-004:2024 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
oSIST prEN 3646-004:2024
oSIST prEN 3646-004:2024
DRAFT
EUROPEAN STANDARD
prEN 3646-004
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2024
ICS 49.060 Will supersede EN 3646-004:2015
English Version
Aerospace series - Connectors, electrical, circular, bayonet
coupling, operating temperature 175 °C continuous - Part
004: Receptacle, 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 004 : 200 °C konstant - Teil 004: Fester Steckverbinder mit
Embasse à fixation par écrou - Norme de produit Mutternbefestigung - Produktnorm
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 3646-004:2024 E
worldwide for CEN national Members.
oSIST prEN 3646-004:2024
prEN 3646-004:2024 (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 . 7
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 . 9
6.1 General. 9
6.2 Marking on the product . 9
6.3 Marking on the individual packaging . 9
7 Technical specification . 9
Bibliography . 10
oSIST prEN 3646-004:2024
prEN 3646-004:2024 (E)
European foreword
This document (prEN 3646-004:2024) 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 3646-004:2015.
This document includes the following significant technical changes with respect to EN 3646-004:2015:
— possibility to have
...
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