SIST EN 2997-002:2023

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

This document specifies the performance and contact arrangements of circular electrical connectors, coupled by threaded ring. It also lists the product standards and models available for selection in this series.

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 002: Leistungsdaten und Kontaktanordnungen

Diese Europäische Norm legt die Leistungsdaten und Kontaktanordnungen der elektrischen Rundsteckver-binder mit Schraubkupplung fest. Sie enthält auch eine Auflistung der Produktnormen und der Baumuster, die in dieser Reihe zur Auswahl stehen.

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 002 : Spécification de performances et d'arrangements des contacts

Le présent document définit les performances et les arrangements des contacts des connecteurs électriques circulaires à accouplement par bague filetée. Il répertorie également les normes de produits et les modèles disponibles pour une sélection dans cette série.

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 - 002. del: Specifikacija lastnosti in razporeditev kontaktov

Ta dokument določa lastnosti in razporeditev kontaktov okroglih električnih konektorjev, priključenih z navojnim obročkom. Navaja tudi standarde za izdelke in modele, ki so na izbiro v tej skupini.

General Information

• Status: Published
• Publication Date: 22-Jan-2023
• 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: 04-Jan-2023
• Due Date: 11-Mar-2023
• Completion Date: 23-Jan-2023
• Ref Project: EN 2997-002:2022 - 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

Relations

• Replaces: 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: 28-Dec-2022
• Revised: 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: 13-Dec-2017

Overview

EN 2997-002:2022 is a CEN (ASD-STAN) European standard that specifies the performance and contact arrangements for aerospace series circular electrical connectors coupled by a threaded ring. The series covers both fire‑resistant and non‑fire‑resistant connector models and defines permitted operating temperature classes: −65 °C to 175 °C continuous, 200 °C continuous, and 260 °C peak. The family is derived from and intermateable with MIL‑DTL‑83723 (series III, type T).

Key topics and technical requirements

• Scope and performance: Defines mechanical, climatic and electrical performance requirements relevant to aerospace applications (see operating conditions and operating characteristics).
• Contact arrangements: Standardized contact layouts and housing sizes to ensure consistent pin/socket arrangements across the series.
• Model codification: Tabled model descriptions and class codes for selecting specific housings (e.g., aluminium, stainless steel, nickel‑plated) and features (grounding spring, hermetic, fire immersion).
• Temperature classes: Clear maximum operating temperatures for each model class (175 °C, 200 °C, 260 °C peak).
• Sealing and environmental protection: Requirements for salt‑mist resistance, sealing plugs, hermetic receptacles and cable outlet interfaces.
• Compatibility and combinations: Rules for mating plugs/receptacles, protective covers, permissible cables and combinations of accessories.
• Assembly and tooling: References to assembly/wiring instructions, tooling and crimp/solder contact requirements.
• Referenced test methods: Normative references include EN 2591-202 (contact resistance at rated current), EN 2591-209 (current temperature derating), and multiple EN 2997 parts that define product standards for plugs, receptacles and accessories.
• Interchangeability: Document notes intermateability with established military series, supporting cross-reference selection and qualification.

Applications

• Equipment selection and procurement of aerospace connectors for avionics, flight control systems, sensors and power distribution.
• Design of aircraft electrical and optical interconnection systems where elevated temperature or fire‑resistance requirements apply.
• Qualification and testing programs for connector performance in harsh environments (temperature extremes, vibration, corrosion).
• Use in civil and defense aerospace platforms where standardised, intermateable circular connectors are required.

Who should use this standard

• Aerospace electrical and systems engineers specifying connector interfaces.
• Component manufacturers and OEMs designing connector products to meet EN 2997 series.
• Procurement, quality and certification teams ensuring compliance and interchangeability.
• Test labs responsible for connector verification against EN 2591 series methods.

Related standards

• EN 2997-001, -003 to -016 (product standards for plugs, receptacles, covers)
• EN 2591-202, EN 2591-209 (test methods)
• EN 3155 series (contacts and crimp/solder requirements)
• EN 3197 (design and installation of aircraft interconnection systems)

Keywords: EN 2997-002:2022, aerospace connectors, circular electrical connectors, threaded ring, fire-resistant connectors, operating temperatures, contact arrangements, connector performance.

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2023
Nadomešča:
SIST EN 2997-002:2016
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 - 002. del: Specifikacija lastnosti in razporeditev
kontaktov
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
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 002: Leistungsdaten und
Kontaktanordnungen
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 002 : Spécification de performances et
d'arrangements des contacts
Ta slovenski standard je istoveten z: EN 2997-002:2022
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 2997-002
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2022
EUROPÄISCHE NORM
ICS 49.060 Supersedes EN 2997-002:2016
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 002: Specification of
performance and contact arrangements
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 002 : °C konstant, 200 °C konstant, 260 °C Spitze - Teil 002:
Spécification de performances et d'arrangements des Leistungsdaten und Kontaktanordnungen
contacts
This European Standard was approved by CEN on 24 February 2020.

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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 2997-002:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 7
4 Model description and codification of models . 7
5 Operating conditions . 8
5.1 General . 8
5.2 Combinations of plugs and receptacles . 8
5.3 Combinations of protective covers and connectors . 9
5.4 Permissible cables . 9
5.5 Operating characteristics . 10
5.5.1 Electrical conditions . 10
5.5.2 Climatic conditions . 10
5.5.3 Mechanical conditions. 10
6 Connector type codes. 10
7 Polarization . 12
8 Housing sizes and contact arrangements . 13
9 Contacts . 29
10 Sealing plugs . 29
11 Cable outlets . 30
12 Tooling . 30
13 Assembly and wiring instruction . 30
Bibliography . 31

European foreword
This document (EN 2997-002:2022) 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, 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 June 2023, and conflicting national standards shall be
withdrawn at the latest by Jun 2023.
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 will supersede EN 2997-002:2016.
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, Turkey and the United
Kingdom.
Introduction
This family of connectors is derived from MIL-DTL-83723 series III, type T with which it is intermateable.
1 Scope
This document specifies the performance and contact arrangements of circular electrical connectors,
coupled by threaded ring. It also lists the product standards and models available for selection in this
series.
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 2591-202, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 202: Contact resistance at rated current
EN 2591-209, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 209: Current temperature derating
EN 2997-001, 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
EN 2997-003, 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 003: Square flange receptacle — Product standard
EN 2997-004, 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
EN 2997-005, 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 005: Hermetic square flange receptacle — Product standard
EN 2997-006, 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 006: Hermetic jam-nut mounted receptacle — Product standard
EN 2997-007, 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 007: Hermetic receptacle with round flange attached by welding or brazing — Product
standard
EN 2997-008, 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 008: Plug — Product standard
EN 2997-009, 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 009: Protective cover for receptacle — Product standard
EN 2997-010, 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 010: Protective cover for plug — Product standard
EN 2997-011, 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 011: Dummy receptacle — Product standard
EN 2997-012, 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 012: Jam-nut for jam-nut receptacles — Product standard
EN 2997-013, 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 013: O-ring seal for jam-nut receptacles — Product standard
EN 2997-014, 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
EN 2997-015, 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 015: Jam-nut mounted receptacle with integrated accessory — Product standard
EN 2997-016, 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 016: Plug with integrated accessory — Product standard
EN 3155-002, Aerospace series — Electrical contacts used in elements of connection — Part 002: List and
utilization of contacts
EN 3155-004, Aerospace series — Electrical contacts used in elements of connection — Part 004: Contacts,
electrical, male, type A, crimp, class T — Product standard
EN 3155-005, Aerospace series — Electrical contacts used in elements of connection — Part 005: Contacts,
electrical, female, type A, crimp, class T — Product standard
EN 3155-018, Aerospace series — Electrical contacts used in elements of connection — Part 018: Contacts,
electrical, male, type A, crimp, class S — Product standard
EN 3155-019, Aerospace series — Electrical contacts used in elements of connection — Part 019: Contacts,
electrical, female, type A, crimp, class S — Product standard
EN 3155-080, 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
EN 3155-081, 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
EN 3197, Aerospace series — Design and installation of aircraft electrica
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