SIST EN 2997-014:2026

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 014: Square flange receptacle with integrated accessory - Product standard

This document specifies the characteristics of square flange mounted receptacles with integrated accessory in the family of circular electrical connectors coupled by threaded ring.
It is applicable to classes specified in Table 3.
For contacts and filler plugs associated with this receptacle, see EN 2997 002. For plugs, see EN 2997 008 and EN 2997 016 and for protective covers, see EN 2997 009.

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 014: Fester Steckverbinder mit quadratischem Montageflansch und integriertem Endgehäuse - Produktnorm

Dieses Dokument legt die Eigenschaften von festen Steckverbindern mit quadratischem Montageflansch mit integriertem Endgehäuse in der Familie der elektrischen Rundsteckverbinder mit Schraubkupplung fest.
Es ist anwendbar für die in Tabelle 3 festgelegten Klassen.
Für Kontakte und Blindstopfen für diesen festen Steckverbinder siehe EN 2997 002. Für freie Steckverbinder siehe EN 2997 008 sowie EN 2997 016 und für Schutzkappen siehe EN 2997 009.

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 014 : Embase à fixation par collerette carrée avec accessoire intégré - Norme de produit

Le présent document spécifie les caractéristiques des embases à fixation par collerette carrée avec accessoire intégré de la famille des connecteurs électriques circulaires à accouplement par bague filetée.
Il est applicable aux classes spécifiées dans le Tableau 3.
Pour les contacts et les obturateurs associés à cette embase, voir l’EN 2997 002. Pour les fiches, voir l’EN 2997 008 et l’EN 2997 016, et pour les bouchons de vol, voir l’EN 2997 009.

Aeronavtika - Konektorji, električni, okrogli, priključeni z navojnim obročkom, odporni ali neodporni proti ognju, s stalno delovno temperaturo med –65 °C in 175 °C, stalno temperaturo 200 °C in najvišjo temeraturo 260 °C - 014. del: Podlaga s kvadratno prirobnico z vključenim priborom - Standard za proizvod

Ta dokument določa značilnosti vgradnih vtičnic s kvadratnim prirobnim nosilcem in integriranim dodatkom v družini krožnih električnih konektorjev, ki se spajajo z navojnim obročem.
Uporablja se za razrede, določene v tabeli 3.
Za kontakte in polnilne čepke, povezane s to vtičnico, glejte EN 2997 002. Za vtiče glejte EN 2997 008 in EN 2997 016, za zaščitne pokrove pa glejte EN 2997 009.

General Information

• Status: Published
• Public Enquiry End Date: 05-May-2024
• Publication Date: 15-Mar-2026
• ICS: 31.220.10 - Plug-and-socket devices. Connectors
• ICS: 49.060 - Aerospace electric equipment and systems
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 09-Mar-2026
• Due Date: 14-May-2026
• Completion Date: 16-Mar-2026
• Ref Project: EN 2997-014:2026 - 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 014: Square flange receptacle with integrated accessory - Product standard

Relations

• Referred By: SIST EN 3660-032:2017 - Aerospace series - Cable outlet accessories for circular and rectangular electrical and optical connectors - Part 032: Cable outlet, style K, straight, for heat shrinkable boot, shielded, sealed - Product standard
• Effective Date: 04-Mar-2026
• Referred By: SIST EN 3660-005:2010 - Aerospace series - Cable outlet accessories for circular and rectangular electrical and optical connectors - Part 005: Cable outlet, style A, 90°, unsealed with clamp strain relief for EN 2997 and EN 4067 - Product standard
• Effective Date: 04-Mar-2026
• Referred By: SIST EN 3155-005:2025 - Aerospace series - Electrical contacts used in elements of connection - Part 005: Contacts, electrical, female, type A, crimp, class T - Product standard
• Effective Date: 04-Mar-2026
• Referred By: SIST EN 3155-081:2019 - Aerospace series - Electrical contacts used in elements of connection - Part 081: Contacts size 22 for EN 2997, electrical, female, type A, crimp, class T - Product standard
• Effective Date: 04-Mar-2026
• Referred By: SIST EN 2591-326:2018 - Aerospace series - Elements of electrical and optical connection - Test methods - Part 326: Fire immersion test
• Effective Date: 04-Mar-2026
• Referred By: SIST EN 2997-002:2016 - 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 002: Specification of performance and contact arrangements
• Effective Date: 04-Mar-2026
• Referred By: SIST EN 3660-065:2022 - Aerospace series - Cable outlet accessories for circular and rectangular electrical and optical connectors - Part 065: Cable outlet, style K, 90°, for heat shrinkable boot, shielded, sealed, self-locking - Product standard
• Effective Date: 04-Mar-2026
• Referred By: SIST EN 3660-064:2010 - Aerospace series - Cable outlet accessories for circular and rectangular electrical and optical connectors - Part 064: Cable outlet, style K, straight, for heat shrinkable boot, shielded, sealed, self-locking for EN 2997 and EN 4067 - Product standard
• Effective Date: 04-Mar-2026
• Referred By: SIST EN 3155-078:2019 - Aerospace series - Electrical contacts used in elements of connection - Part 078: Contacts size 22 for EN 2997, electrical, male, type A, crimp, class S - Product standard
• Effective Date: 04-Mar-2026
• Referred By: SIST EN 2997-001:2017 - 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 001: Technical specification
• Effective Date: 04-Mar-2026
• Referred By: SIST EN 3660-064:2016 - Aerospace series - Cable outlet accessories for circular and rectangular electrical and optical connectors - Part 064: Cable outlet, style K, straight, for heat shrinkable boot, shielded, sealed, self-locking for EN 2997 - Product standard
• Effective Date: 04-Mar-2026
• Referred By: SIST EN 3660-005:2019 - Aerospace series - Cable outlet accessories for circular and rectangular electrical and optical connectors - Part 005: Cable outlet, style A, 90°, unsealed with clamp strain relief - Product standard
• Effective Date: 04-Mar-2026
• Referred By: SIST EN 3155-080:2015 - Aerospace series - Electrical contacts used in elements of connection - Part 080: Contacts size 22 for EN 2997, electrical, male, type A, crimp, class T - Product standard
• Effective Date: 04-Mar-2026
• Referred By: SIST EN 3155-079:2019 - Aerospace series - Electrical contacts used in elements of connection - Part 079: Contacts size 22 for EN 2997, electrical, female, type A, crimp, class S - Product standard
• Effective Date: 04-Mar-2026
• Referred By: SIST EN 2997-002:2012 - 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 002: Specification of performance and contact arrangements
• Effective Date: 04-Mar-2026

Overview

SIST EN 2997-014:2026 is a European standard developed by CEN for the aerospace industry, specifically addressing the requirements for square flange mounted receptacles with an integrated accessory. These receptacles are part of the widely used series of circular electrical connectors coupled by a threaded ring, covering both fire-resistant and non fire-resistant types. The standard specifies performance for connectors designed for continuous operating temperatures from -65 °C up to 175 °C, 200 °C continuous, and short-term peaks up to 260 °C. The document plays a critical role in ensuring interoperability, safety, and reliability of aerospace electrical equipment and systems.

Key Topics

• Scope and Applicability

  • Defines characteristics for square flange receptacles with integrated accessories within the EN 2997 aerospace connector family.
  • Applicable to specific classes of receptacles, as identified in the standard.

• Environmental and Performance Requirements

  • Fire resistance: covers both fire-resistant and non fire-resistant variants.
  • Temperature range: operational from -65 °C up to 175 °C continuously; available in versions for 200 °C continuous use and withstanding short-term peaks up to 260 °C.

• Design and Mounting

  • Details on dimensions, tolerances, and recommended mounting hole configurations for installation in aerospace panels.
  • Integrated accessory features for simplified assembly and reliable connection in challenging environments.

• Materials and Surface Treatment

  • Receptacles are manufactured with passivated stainless steel, ensuring high resistance to corrosion, including salt mist exposure.

• Product Classes

  • Several classes cover standard, high-vibration, and fire immersion performance needs; choice of class allows specification for demanding electrical systems.

• Identification and Marking

  • Requirements for product designation, manufacturer information, and traceability.

Applications

SIST EN 2997-014:2026 is widely used across the aerospace sector, including:

• Aircraft Electrical Systems

  • For connecting subsystems such as avionics, instrumentation, power distribution, and control modules.
  • Ensures secure electrical connections resistant to vibration, temperature extremes, and electromagnetic interference.

• Military and Civil Aerospace Equipment

  • Suitable for harsh environments where fire-resistance and reliable performance under extreme conditions are paramount.
  • Standardized connector interfaces allow for compatibility and ease of maintenance across a variety of aerospace platforms.

• Integration in Complex Systems

  • Supports the design of modular, high-density electrical systems thanks to standardized flange mounting and accessory integration.

• Maintenance and Upgrades

  • Facilitates component replacement and upgrades in service, reducing downtime and ensuring compliance with current aerospace safety standards.

Related Standards

SIST EN 2997-014:2026 is part of a comprehensive set of aerospace connector standards. Related documents include:

• EN 2997-001 – Technical specification for circular electrical connectors coupled by threaded ring.
• EN 2997-002 – Specification of performance and contact arrangements.
• EN 2997-008 & EN 2997-016 – Product standards for plugs and plugs with integrated accessories.
• EN 2997-009 – Product standard for protective covers for receptacles.
• EN 3155 Series – Aerospace electrical contacts standards, detailing types and use of contacts in connectors.

These standards ensure system-wide compatibility and support industry-wide best practices for safety, reliability, and maintenance in aerospace electrical equipment.

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Keywords: SIST EN 2997-014:2026, aerospace connectors, circular electrical connectors, square flange receptacle, integrated accessory, fire-resistant connector, high-temperature aerospace connector, CEN standard, aircraft electrical systems, aerospace standards.

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2026
Aeronavtika - Konektorji, električni, okrogli, priključeni z navojnim obročkom,
odporni ali neodporni proti ognju, s stalno delovno temperaturo med –65 °C in 175
°C, stalno temperaturo 200 °C in najvišjo temeraturo 260 °C - 014. del: Podlaga s
kvadratno prirobnico z vključenim priborom - 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 014: Square flange receptacle with integrated
accessory - 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 014: Fester Steckverbinder mit
quadratischem Montageflansch und integriertem Endgehäuse - 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 014 : Embase à fixation par collerette carrée avec
accessoire intégré - Norme de produit
Ta slovenski standard je istoveten z: EN 2997-014:2026
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 2997-014
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2026
EUROPÄISCHE NORM
ICS 49.060 Supersedes EN 2997-014:2016
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 014: Square flange
receptacle with integrated accessory - 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 feuerbeständig, Betriebstemperaturen -65 °C bis 175
continu, 200 °C continu, 260 °C en pointe - Partie 014 : °C konstant, 200 °C konstant, 260 °C Spitze - Teil 014:
Embase à fixation par collerette carrée avec accessoire Fester Steckverbinder mit quadratischem
intégré - Norme de produit Montageflansch und integriertem Endgehäuse -
Produktnorm
This European Standard was approved by CEN on 29 September 2025.

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
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 2997-014:2026 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 Panel cut-out and mounting of connectors . 6
4.3 Material, surface treatment . 8
4.4 Main general characteristics . 8
4.5 Possible combinations of plugs and receptacles . 8
5 Designation . 9
6 Marking . 10
7 Technical specification . 10
Bibliography . 11

European foreword
This document (EN 2997-014:2026) 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 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 2026, and conflicting national standards shall
be withdrawn at the latest by August 2026.
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 2997-014:2016.
EN 2997-014:2016:
— Figure 1: correction of false attachment of dimension G;
— Table 1: correction and addition of mass values;
— document editorially revised.
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 t
...