EN 2997-004:2024

Aerospace series - Connectors, electrical, circular, coupled by threaded ring, fire-resistant or non fire-resistant, operating temperatures - 65 °C to 175 °C continuous, 200 °C continuous, 260 °C peak - Part 004: Jam-nut mounted receptacle - Product standard

This document specifies the characteristics of jam-nut mounted receptacles in the family of circular electrical connectors coupled by threaded ring.
It is applicable to the class specified in Table 4.
For contacts, filler plugs, and rear accessories associated with this receptacle, see EN 2997-002. For plugs and protective covers, see EN 2997-008 and EN 2997-009 respectively. For spare jam-nuts and o-rings, see EN 2997-012 and EN 2997-013 respectively.

Luft- und Raumfahrt - Elektrische Rundsteckverbinder mit Schraubkupplung, feuerbeständig oder nicht feuerbeständig, Betriebstemperaturen - 65 °C bis 175 °C konstant, 200 °C konstant, 260 °C Spitze - Teil 004: Fester Steckverbinder mit Mutternbefestigung - Produktnorm

Dieses Dokument legt die Eigenschaften von festen Steckverbindern mit Mutternbefestigung in der Familie der elektrischen Rundsteckverbinder mit Schraubkupplung fest.
Es ist anwendbar für die in Tabelle 4 festgelegte Klasse.
Hinsichtlich der für diesen festen Steckverbinder verwendbaren Kontakte, Blindstecker und rückseitigen Zubehörteile siehe EN 2997 002. Für freie Steckverbinder und Schutzkappen siehe EN 2997 008 bzw. EN 2997 009. Für die Ersatzmuttern und -O-Ringe siehe EN 2997 012 bzw. EN 2997 013.

Série aérospatiale - Connecteurs électriques circulaires à accouplement par bague filetée, résistant au feu ou non, températures d'utilisation -65 °C à 175 °C continu, 200 °C continu, 260 °C en pointe - Partie 004 : Embase à fixation par écrou - Norme de produit

Le présent document spécifie les caractéristiques des embases à fixation par écrou de la famille des connecteurs électriques circulaires à accouplement par bague filetée.
Il s'applique aux classes définies dans le Tableau 4.
Pour les contacts, les obturateurs et les accessoires arrière associés à cette embase, voir l’EN 2997-002. Pour les fiches et les bouchons de vol, voir respectivement l’EN 2997-008 et l’EN 2997-009. Pour les écrous de fixation et joints toriques de rechange, voir respectivement l’EN 2997-012 et l’EN 2997-013.

Aeronavtika - Konektorji, električni, okrogli, priključeni z navojnim obročkom, odporni ali neodporni proti ognju, s stalno delovno temperaturo med –65 °C in 175 °C, stalno 200 °C, najvišjo 260 °C - 004. del: Pritrditev z zaklepom matice - Standard za proizvod

Ta dokument določa značilnosti pritrditev z matico v družini okroglih električnih konektorjev, priključenih z navojnim obročkom.
Uporablja se za razred iz preglednice 4.
Za dodatke kontaktov, slepih čepov in izhodov, povezane s to podlogo, glej standard EN 2997-002. Za čepe in zaščitna prekrivala glej ustrezna standarda EN 2997-008 in EN 2997-009. Za rezervne matice in tesnilne obroče glej standarda EN 2997-012 in EN 2997-013.

General Information

• Status: Published
• Publication Date: 13-Feb-2024
• ICS: 49.060 - Aerospace electric equipment and systems
• Technical Committee: ASD-STAN - Aerospace
• Drafting Committee: ASD-STAN/D 2/S 3 - Elements of Connection (Connectors, Contacts, rear accessories, crimping tools
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 14-Feb-2024
• Completion Date: 14-Feb-2024
• Ref Project: SIST EN 2997-004:2024 - Aerospace series - Connectors, electrical, circular, coupled by threaded ring, fire-resistant or non fire-resistant, operating temperatures - 65 °C to 175 °C continuous, 200 °C continuous, 260 °C peak - Part 004: Jam-nut mounted receptacle - Product standard

Relations

• Replaces: EN 2997-004:2006 - Aerospace series - Connectors, electrical, circular, coupled by threaded ring, fire-resistant or non fire-resistant, operating temperatures - 65 °C to 175 °C continuous, 200 °C continuous, 260 °C peak - Part 004: Jam-nut mounted receptacle - Product standard
• Effective Date: 02-Mar-2022

Overview

EN 2997-004:2024 is the CEN product standard that specifies the characteristics of jam‑nut mounted receptacles in the EN 2997 aerospace family of circular electrical connectors coupled by a threaded ring. The standard addresses design, installation interfaces and environmental capability for receptacles used in aerospace electrical and avionic systems, including fire‑resistant and non fire‑resistant types and defined operating temperature ranges.

This part is intended for manufacturers, system integrators, procurement teams and maintenance engineers who need a consistent specification for panel‑mounted receptacles used in aircraft and space applications.

Key Topics

• Scope & applicability: Defines jam‑nut mounted receptacles for the class(es) specified in the standard and references related EN 2997 parts for contacts, plugs, covers and spares.
• Dimensions and mass: Housing dimensions and mass limits are provided (see Figure 1 and Table 1 in the standard) to ensure mechanical compatibility across designs.
• Tightening torque: Recommended attachment nut torques are specified (Table 2) to ensure reliable mechanical fixation and sealing during service (values cover common housing sizes).
• Panel cut‑out: Panel cut‑out geometry and minimum clearances are provided (Figure 2 and Table 3) to guide panel design and dual‑connector layouts.
• Materials & surface treatment: Requirements for housing materials and finishes are defined to meet corrosion and environmental resistance expectations.
• Designation & marking: Identification blocks, manufacturer marking and date coding requirements are described to support traceability and configuration control.
• Reference to performance: Main general and electrical performance characteristics are covered by EN 2997-002 and EN 2997-001; EN 2997-004 focuses on the product‑level receptacle specifics.

Applications

• Panel‑mounted receptacles for avionic and aerospace equipment where a threaded‑ring coupling and jam‑nut fixation are required.
• Retrofit and new‑build installations requiring defined panel cut‑outs and consistent mechanical interfaces.
• Procurement and quality control: provides acceptance criteria for dimensions, materials, torque settings, marking and delivery options.
• Maintenance and spare parts: references spare jam‑nuts and O‑ring standards to ensure interchangeability and correct spares provisioning.

Related Standards

• EN 2997-001 - Technical specification (system performance requirements)
• EN 2997-002 - Performance and contact arrangements
• EN 2997-008 - Plug product standard
• EN 2997-009 - Protective cover for receptacle
• EN 2997-012 - Jam‑nut for jam‑nut receptacles
• EN 2997-013 - O‑ring seal for jam‑nut receptacles
• EN 3155-002 and ISO 263 - related contact lists and thread standards

Practical value: EN 2997-004:2024 gives designers and buyers a concise product specification to ensure mechanical compatibility, installation reliability and traceability for jam‑nut mounted receptacles across the EN 2997 connector family.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2024
Aeronavtika - Konektorji, električni, okrogli, priključeni z navojnim obročkom,
odporni ali neodporni proti ognju, s stalno delovno temperaturo med –65 °C in 175
°C, stalno 200 °C, najvišjo 260 °C - 004. del: Pritrditev z zaklepom matice -
Standard za proizvod
Aerospace series - Connectors, electrical, circular, coupled by threaded ring, fire-
resistant or non fire-resistant, operating temperatures - 65 °C to 175 °C continuous, 200
°C continuous, 260 °C peak - Part 004: Jam-nut mounted receptacle - Product standard
Luft- und Raumfahrt - Elektrische Rundsteckverbinder mit Schraubkupplung,
feuerbeständig oder nicht feuerbeständig, Betriebstemperaturen - 65 °C bis 175 °C
konstant, 200 °C konstant, 260 °C Spitze - Teil 004: Fester Steckverbinder mit
Mutternbefestigung - Produktnorm
Série aérospatiale - Connecteurs électriques circulaires à accouplement par bague
filetée, résistant au feu ou non, températures d'utilisation -65 °C à 175 °C continu, 200
°C continu, 260 °C en pointe - Partie 004 : Embase à fixation par écrou - Norme de
produit
Ta slovenski standard je istoveten z: EN 2997-004:2024
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 2997-004
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2024
EUROPÄISCHE NORM
ICS 49.060 Supersedes EN 2997-004:2006
English Version
Aerospace series - Connectors, electrical, circular, coupled
by threaded ring, fire-resistant or non fire-resistant,
operating temperatures - 65 °C to 175 °C continuous, 200
°C continuous, 260 °C peak - Part 004: Jam-nut mounted
receptacle - Product standard
Série aérospatiale - Connecteurs électriques circulaires Luft- und Raumfahrt - Elektrische Rundsteckverbinder
à accouplement par bague filetée, résistant au feu ou mit Schraubkupplung, feuerbeständig oder nicht
non, températures d'utilisation -65 °C à 175 °C continu, feuerbeständig, Betriebstemperaturen - 65 °C bis 175
200 °C continu, 260 °C en pointe - Partie 004 : Embase °C konstant, 200 °C konstant, 260 °C Spitze - Teil 004:
à fixation par écrou - Norme de produit Fester Steckverbinder mit Mutternbefestigung -
Produktnorm
This European Standard was approved by CEN on 15 October 2023.

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
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 2997-004:2024 E
worldwide for CEN national Members.

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, surface treatment . 8
4.5 Main general characteristics . 8
4.6 Possible combinations of plugs and receptacles . 8
5 Designation . 9
6 Marking . 10
7 Technical specification . 10
Annex A (informative) Evolution sheet . 11
Bibliography . 12

European foreword
This document (EN 2997-004:2024) 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-STAN, 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 August 2024, and conflicting national standards shall be
withdrawn at the latest by August 2024.
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 2997-004:2006.
The main changes between this edition and the previous edition are listed in Table A.1.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
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, Türkiye and the United
Kingdom.
1 Scope
This document specifies the characteristics of jam-nut mounted receptacles in the family of circular
electrical connectors coupled by threaded ring.
It is applicable to the class specified in Table
...