SIST EN 2882:2024

Aerospace series - Nut, hexagonal, self-locking, with counterbore and captive washer, in steel, cadmium plated, MoS2 lubricated - Classification: 1 100 MPa (at ambient temperature) / 235 °C

This document specifies the characteristics for hexagon nuts, with counterbore and captive washer, with a self-locking feature achieved by forming the upper portion out-of-round, in steel, cadmium plated, MoS2 lubricated, classification 1 100 MPa /235 °C .

Luft- und Raumfahrt - Sechskantmuttern, selbstsichernd, mit Aussenkung und Bördelscheibe, aus Stahl, verkadmet, MoS2 geschmiert - Klasse: 1 100 MPa (bei Raumtemperatur) / 235 °C

Dieses Dokument legt die Eigenschaften von Sechskantmuttern mit Aussenkung, Bördelscheibe und einer durch Verformung des oberen Teils erzeugten Selbstsicherung, aus Stahl, verkadmet, MoS2 geschmiert, Klasse: 1 100 MPa /235 °C , fest.

Série aérospatiale - Écrous hexagonaux, à freinage interne, avec chambrage et rondelle captive, en acier, cadmiés, lubrifiés MoS2 - Classification: 1 100 MPa (à température ambiante)/235 °C

Le présent document spécifie les caractéristiques des écrous hexagonaux, avec chambrage et rondelle captive, avec déformation de la partie supérieure du faux-rond pour assurer le freinage, en acier, cadmiés, lubrifiés au MoS2, classification 1 100 MPa/235 °C.

Aeronavtika - Matice, šestrobe, samozapiralne, z ugreznjeno in robljeno podložko, iz jekla, kadmirane, mazane z MoS2 - Klasifikacija: 1100 MPa (pri temperaturi okolice)/235 °C

Ta dokument določa značilnosti šestrobih matic z ugreznjeno in robljeno podložko, s samozapiralno funkcijo. ki jo zagotavlja ovalna oblika zgornjega dela, iz jekla, kadmiranih, mazanih z MoS2, s klasifikacijo 1100 MPa/235 °C.

General Information

• Status: Published
• Public Enquiry End Date: 19-Jan-2022
• Publication Date: 10-Jan-2024
• ICS: 49.030.30 - Nuts
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 03-Jan-2024
• Due Date: 09-Mar-2024
• Completion Date: 11-Jan-2024
• Ref Project: EN 2882:2023 - Aerospace series - Nut, hexagonal, self-locking, with counterbore and captive washer, in steel, cadmium plated, MoS2 lubricated - Classification: 1 100 MPa (at ambient temperature) / 235 °C

Relations

• Revised: SIST EN 2882:2009 - Aerospace series - Nuts, hexagonal, self-locking, with counterbore and captive washer, in steel, cadmium plated, MoS2 lubricated - Classification: 1 100 MPa (at ambient temperature) / 235 °C
• Effective Date: 19-Jan-2023

Overview

SIST EN 2882:2024 is a European aerospace standard that specifies the characteristics and requirements for hexagonal self-locking nuts with a counterbore and captive washer. These nuts are made of steel, cadmium-plated, and lubricated with molybdenum disulfide (MoS2). The classification is designed to withstand a tensile strength of 1100 MPa at ambient temperature and maintain integrity up to 235 °C. The self-locking feature is achieved by forming the upper portion of the nut out-of-round, providing reliable locking performance critical in aerospace applications.

Developed under the authority of the Aerospace and Defence Industries Association of Europe (ASD-STAN) and approved by CEN, this standard supersedes EN 2882:2006 and includes updates in materials, normative references, and quality management systems. The document ensures compatibility with international aerospace quality standards and supports robust manufacturing and testing practices.

Key Topics

• Scope and Purpose

  • Applies to hexagonal nuts with captive washers for aerospace assemblies.
  • Nuts provide a self-locking feature by mechanical deformation (out-of-round upper section).
  • Designed for high-strength aerospace fastening with specified tensile strength and thermal tolerance.

• Material and Surface Treatment

  • Steel compliant with TR 3791 materials guidelines for high temperature and strength.
  • Cadmium plating per EN 2133 for corrosion resistance, including a minimum plating thickness of 5 µm on critical surfaces.
  • Dry lubricant coating with MoS2 per EN 2491 to reduce friction and improve performance during assembly.

• Dimensions and Configuration

  • Exact dimensions specified to ISO 8538 with tolerances aligned to ISO 8788.
  • Counterbore and captive washer ensure secure mechanical engagement and load distribution.
  • Compatibility with standard socket wrenches maintained.

• Quality Management

  • Manufacturers must operate under an aerospace-approved quality management system, e.g., EN 9100.
  • Product qualification follows EN 9133 guidelines for aerospace standard components.
  • Approval and certification requirements ensure reliability and traceability.

• Marking and Identification

  • Nuts are marked according to EN 2424 style N, ensuring clear traceability within aerospace supply chains.
  • The marking includes classification details and batch identification.

Applications

SIST EN 2882:2024 nuts are essential components in aerospace and defense assemblies where reliability, high strength, and resistance to elevated temperatures are critical. Typical applications include:

• Aircraft structural fastening
• Aerospace engine components
• Spacecraft hardware requiring lightweight, robust fastening solutions
• Defense equipment where vibration resistance and durability are mandatory

Their self-locking design reduces the risk of loosening under vibration and thermal cycling, improving safety and maintenance cycles in critical aerospace operations.

Related Standards

SIST EN 2882:2024 interacts with and references several key aerospace and engineering standards, including:

• EN 2133: Cadmium plating requirements for steel aerospace components
• EN 2491: Specifications for MoS2 dry lubricants coating methods
• EN 2424: Marking protocols for aerospace products
• EN 9100: Quality management system requirements tailored for aviation, space, and defense organizations
• EN 9133: Qualification procedures for aerospace standard products
• ISO 8538: Dimensions for hexagonal self-locking nuts with counterbore and captive washer
• ISO 8788: Tolerances of form and position for metric nuts
• ISO 5855-2 & ISO 5858: Thread dimensions and procurement specifications for nuts used in aerospace

These interconnected standards ensure comprehensive control over design, manufacturing, surface treatment, quality assurance, and testing protocols.

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Keywords: SIST EN 2882:2024, aerospace hexagonal nut, self-locking nut, cadmium plated nut, molybdenum disulfide lubrication, high strength nut, aerospace fasteners, captive washer nut, aerospace quality standards, EN 9100, aerospace nuts standard, aviation fasteners, aerospace locking nuts, aerospace hardware, tensile strength 1100 MPa, aerospace temperature resistance.

Standards Content (Sample)

SLOVENSKI STANDARD
01-februar-2024
Aeronavtika - Matice, šestrobe, samozapiralne, z ugreznjeno in robljeno podložko,
iz jekla, kadmirane, mazane z MoS2 - Klasifikacija: 1100 MPa (pri temperaturi
okolice)/235 °C
Aerospace series - Nut, hexagonal, self-locking, with counterbore and captive washer, in
steel, cadmium plated, MoS2 lubricated - Classification: 1 100 MPa (at ambient
temperature) / 235 °C
Luft- und Raumfahrt - Sechskantmuttern, selbstsichernd, mit Aussenkung und
Bördelscheibe, aus Stahl, verkadmet, MoS2 geschmiert - Klasse: 1 100 MPa (bei
Raumtemperatur) / 235 °C
Série aérospatiale - Écrous hexagonaux, à freinage interne, avec chambrage et rondelle
captive, en acier, cadmiés, lubrifiés MoS2 - Classification: 1 100 MPa (à température
ambiante)/235 °C
Ta slovenski standard je istoveten z: EN 2882:2023
ICS:
49.030.30 Matice Nuts
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 2882
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2023
EUROPÄISCHE NORM
ICS 49.030.30 Supersedes EN 2882:2006
English Version
Aerospace series - Nut, hexagonal, self-locking, with
counterbore and captive washer, in steel, cadmium plated,
MoS2 lubricated - Classification: 1 100 MPa (at ambient
temperature) / 235 °C
Série aérospatiale - Écrou hexagonal, à freinage Luft- und Raumfahrt - Sechskantmutter,
interne, avec chambrage et rondelle captive, en acier, selbstsichernd, mit Aussenkung und Bördelscheibe, aus
cadmié, lubrifié au MoS2 - Classification : 1 100 MPa (à Stahl, verkadmet, MoS2 geschmiert - Klasse: 1 100 MPa
température ambiante)/235 °C (bei Raumtemperatur) / 235 °C
This European Standard was approved by CEN on 18 December 2022.

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
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 2882:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 5
4 Required characteristics . 5
4.1 Configuration – Dimensions – Masses . 5
4.2 Materials . 5
4.3 Surface treatment . 5
5 Designation . 8
6 Marking . 8
7 Technical specification . 8
8 Quality management systems . 8

European foreword
This document (EN 2882:2023) 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 May 2023, and conflicting national standards shall be
withdrawn at the latest by May 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 supersedes EN 2882:2006.
— normative references updated;
— Clause 3 added;
— Subclause 4.2 „Materials“ revised;
— Clause 7 “Quality management system” added;
— 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 to implement this European Standard:
...