SIST EN 2997-012:2024

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 012: Jam-nut for jam-nut receptacles - Product standard

This document specifies the characteristics of jam-nuts for jam-nut receptacles in the family of circular electrical connectors coupled by threaded ring.
It is applicable to classes specified in Table 3.
For receptacles using these jam-nuts, see EN 2997-004, and EN 2997-006 for class SE only.

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 012: Sechskantmutter für festen 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 012 : Écrou pour embase à fixation par écrou - Norme de produit

Le présent document spécifie les caractéristiques des écrous pour embases à fixation par écrou de la famille des connecteurs électriques circulaires à accouplement par bague filetée.
Il est applicable aux classes spécifiées dans le Tableau 3.
Pour les embases utilisant ces écrous, voir l’EN 2997-004, et l’EN 2997-006 pour la classe SE uniquement.

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 - 012. del: Šestroba matica za pritrditev z eno luknjo - Standard za proizvod

Ta dokument določa značilnosti šestrobih matic za pritrditev z eno luknjo v družini okroglih električnih konektorjev, priključenih z navojnim obročkom.
Uporablja se za razred iz preglednice 3.
Za pritrditve s temi maticami glej standarda EN 2997-004 in EN 2997-006 (samo za razred SE).

General Information

• Status: Published
• Public Enquiry End Date: 02-May-2023
• Publication Date: 15-Aug-2024
• 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: 08-Aug-2024
• Due Date: 13-Oct-2024
• Completion Date: 16-Aug-2024
• Ref Project: EN 2997-012:2024 - 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 012: Jam-nut for jam-nut receptacles - Product standard

Relations

• Revised: SIST EN 2997-012:2009 - 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
• Effective Date: 19-Jan-2023

Overview

SIST EN 2997-012:2024 is a European standard developed by CEN that specifies the product requirements for jam-nuts used in jam-nut receptacles within the aerospace series of circular electrical connectors. These connectors are coupled by threaded rings and are designed to withstand a range of operating temperatures from -65 °C to 175 °C continuous, up to 200 °C continuous, and peak temperatures up to 260 °C. This standard applies specifically to jam-nuts in the family of connectors categorized under classes detailed in the document, supporting both fire-resistant and non-fire-resistant applications.

The standard supersedes the previous EN 2997-012:2009, introducing updated design features such as optional slot designs and changes in hole requirements for improved functionality and reliability in aerospace environments.

Key Topics

• Scope and Application
  SIST EN 2997-012:2024 governs the design, dimensions, materials, and surface treatments of jam-nuts used for securing jam-nut receptacles in circular electrical connectors. It complements other standards such as EN 2997-004 (jam-nut mounted receptacles) and EN 2997-006 (hermetic jam-nut receptacles for class SE).

• Dimensional Specifications
  Jam-nut dimensions, including hole sizes and spacing, are defined with precise tolerances as per Figure 1 and Table 1 in the document. Optional design features include slots on the nuts, with limits on the number of slots according to housing size (see Table 2).

• Material and Surface Treatment
  Three main classes of jam-nut materials and finishes are specified for different environmental and temperature conditions:

  • WS (Olive-green cadmium-plated aluminum alloy): Provides 500 hours salt mist resistance, max 175 °C continuous use.
  • RS (Nickel-plated aluminum alloy): Offers 48 hours salt mist resistance, max 200 °C continuous use.
  • SE (Passivated stainless steel): Fire-resistant with 500 hours salt mist resistance, suitable for peak temperatures up to 260 °C.

• Performance Requirements
  General performance characteristics comply with EN 2997-002, ensuring mechanical integrity and electrical reliability in aerospace applications.

• Technical Conformance
  The specification for technical details follows EN 2997-001, aligning manufacturing and testing protocols with aerospace industry standards.

Applications

SIST EN 2997-012:2024 is crucial for industries requiring high-performance electrical connectors in harsh operational environments. Typical applications include:

• Aircraft electrical and electronic systems requiring durable, fire-resistant connectors.
• Aerospace manufacturing and maintenance where connectors must operate reliably across extreme temperature ranges.
• Defense and space sectors demanding components that meet strict European aerospace standards.
• Engineering and design of hermetic and jam-nut coupled circular connectors used in avionics, control systems, and power distribution.

Selecting the appropriate jam-nut based on material class ensures optimal corrosion resistance, mechanical strength, and thermal performance for mission-critical aerospace components.

Related Standards

For comprehensive compliance and component compatibility, SIST EN 2997-012:2024 should be used in conjunction with the following standards:

• EN 2997-001: Technical specifications for circular connectors, detailing design and testing requirements.
• EN 2997-002: Performance specifications and contact arrangements for these aerospace electrical connectors.
• EN 2997-004: Product standard for jam-nut mounted receptacles compatible with the jam-nuts defined in this standard.
• EN 2997-006: Product standard for hermetic jam-nut mounted receptacles, specifically for class SE jam-nuts.

These interconnected standards support a harmonized approach to aerospace connector design, ensuring safety, compatibility, and quality across European aerospace industry supply chains.

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Keywords: aerospace connectors, circular electrical connectors, jam-nut receptacles, EN 2997-012, jam-nut specifications, fire-resistant connectors, high-temperature connectors, European aerospace standards, connector materials, aerospace component standards, aerospace electrical connector design.

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-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 - 012. del: Šestroba matica za pritrditev z eno
luknjo - 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 012: Jam-nut for jam-nut receptacles - 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 012: Sechskantmutter für festen
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 012 : Écrou pour embase à fixation par écrou -
Norme de produit
Ta slovenski standard je istoveten z: EN 2997-012:2024
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 2997-012
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2024
EUROPÄISCHE NORM
ICS 49.060 Supersedes EN 2997-012:2009
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 012: Jam-nut for jam-nut
receptacles - 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 012 : Écrou °C konstant, 200 °C konstant, 260 °C Spitze - Teil 012:
pour embases à fixation par écrou - Norme de produit Sechskantmutter für feste Steckverbinder mit
Mutternbefestigung - Produktnorm
This European Standard was approved by CEN on 12 May 2024.

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 2997-012:2024 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. 4
4.2 Material, surface treatment . 6
4.3 Main general characteristics . 7
5 Designation . 7
6 Marking . 7
7 Technical specification . 7
Bibliography . 8

European foreword
This document (EN 2997-012:2024) has been prepared by ASD-STAN.
After enquiries and votes carrie
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