SIST EN 4269:2023
(Main)Aerospace series - Nuts, anchor, self-locking, floating, two lug, reduced series, with counterbore, in steel, cadmium plated, MoS2 lubricated - Classification: 1 110 MPa (at ambient temperature)/235 °C
Aerospace series - Nuts, anchor, self-locking, floating, two lug, reduced series, with counterbore, in steel, cadmium plated, MoS2 lubricated - Classification: 1 110 MPa (at ambient temperature)/235 °C
This document specifies the characteristics of self-locking, floating, two lug anchor nuts, reduced series,
with counterbore, in steel, cadmium plated, MoS 2 lubricated.
Classification: 1 100 MPa1/235 °C2
Luft- und Raumfahrt - Annietmuttern, selbstsichernd, beweglich, beiderseitiger Flansch, mit zylindrischer Aussenkung, aus Stahl, verkadmet, MoS2-geschmiert - Klasse: 1 100 MPa (bei Raumtemperatur)/235 °C
Dieses Dokument legt die Merkmale von selbstsichernden, beweglichen Annietmuttern mit beiderseitigem verkürztem Flansch, mit zylindrischer Aussenkung, aus Stahl, verkadmet, MoS2-geschmiert, fest.
Klasse: 1 100 MPa /235 °C .
Série aérospatiale - Écrous à river, à freinage interne, flottants, double patte, série réduite, avec chambrage, en acier, cadmiés, lubrifiés au MoS2 - Classification : 1 100 MPa (à température ambiante)/235 °C
Le présent document spécifie les caractéristiques des écrous à river, à freinage interne, flottants, double patte, série réduite, avec chambrage, en acier, cadmiés, lubrifiés au MoS2.
Classification : 1 100 MPa /235 °C.
Aeronavtika - Zakovne matice, samovarovalne, premične, dvostranske, skrajšana serija, z izvrtino za valjaste vijake, iz jekla, prevlečene s kadmijem, namazane z MoS2 - Klasifikacija: 1 110 MPa (pri temperaturi okolice)/235 °C
Ta dokument določa lastnosti samozapornih, premičnih, dvostranskih zakovnih matic iz skrajšane serije z izvrtino za valjaste vijake, iz jekla, kadmiranih, mazanih z MoS 2.
Klasifikacija: 1100 Mpa1/235 °C2
General Information
- Status
- Published
- Publication Date
- 16-Aug-2023
- Technical Committee
- I13 - Imaginarni 13
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 19-Jul-2023
- Due Date
- 23-Sep-2023
- Completion Date
- 17-Aug-2023
Relations
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
Overview
SIST EN 4269:2023 is a European standard focused on the specification of self-locking, floating, two-lug anchor nuts, reduced series, with counterbore, manufactured in steel, cadmium plated, and lubricated with molybdenum disulfide (MoS2). These specialized nuts are designed for aerospace applications and are classified for use at tensile stress levels of 1 110 MPa at ambient temperature and operational temperatures up to 235 °C. Developed by the Slovenian Institute for Standardization (SIST), this standard aligns with the broader European standard EN 4269:2023 and is part of the Aerospace Series standards.
Key Topics
- Product Characteristics: This standard sets out the requirements for configuration, dimensions, tolerances, and mass for the anchor nuts, ensuring interchangeability and compatibility in aerospace assemblies.
- Material and Surface Treatment:
- Only specified steel grades are used for manufacturing.
- All nuts must be cadmium plated per EN 2133 to provide corrosion resistance.
- MoS2 dry lubricant coating is required for reduced friction and improved performance, in line with EN 2491.
- Mechanical Classification: These nuts are designed to perform at a minimum tensile strength of 1 110 MPa at ambient temperature and withstand temperatures up to 235 °C without loss of mechanical or self-locking properties.
- Quality Management: Production must be undertaken by approved aerospace manufacturers with appropriate quality management and qualification procedures (e.g., EN 9100, EN 9133).
- Marking and Identification: Nuts must be marked according to standard guidelines (EN 2424) to ensure traceability and proper installation.
Applications
- Aerospace Fastening Systems: These self-locking, floating anchor nuts are primarily used in the aerospace and aviation industries. Their floating design allows for easier bolt alignment during assembly, particularly in structures subject to movement, vibration, or thermal expansion.
- Structural Assemblies: Used where high strength, secure fastening, and resistance to environmental factors are essential, such as in aircraft fuselage, wings, engine nacelles, and access panels.
- Maintenance and Repair: The nuts' self-locking, anti-corrosive, and lubricated properties support reliable performance in maintenance operations and replacements, helping to increase the operational lifespan of aerospace components.
- General High-Performance Engineering: Outside of aerospace, these anchor nuts may also be utilized in demanding engineering environments requiring similar mechanical, corrosion, and temperature resistance characteristics.
Related Standards
To ensure comprehensive quality and compatibility, SIST EN 4269:2023 references several related standards:
- EN 2133: Cadmium plating requirements for steel components in aerospace.
- EN 2424: Specifications for marking aerospace products.
- EN 2491: Methods for coating aerospace components with MoS2 dry lubricants.
- ISO 5855-2 and ISO 8788: Specifications for MJ thread dimensions and tolerances in aerospace bolts and nuts.
- ISO 7323: Methods for determining plasticity and recovery for rubber materials used in aerospace fasteners.
- TR 3791: Reference for acceptable materials in aerospace self-locking nuts.
- EN 9100: Quality management system requirements for aviation, space, and defense.
- EN 9133: Aerospace product qualification procedures.
- ISO 7332: Additional specifications for floating, two-lug anchor nuts with MJ threads across a broader temperature range.
By following SIST EN 4269:2023, manufacturers, engineers, and quality assurance professionals ensure that aerospace fastening solutions meet strict industry standards for safety, reliability, and performance. This helps maintain the integrity of critical aircraft systems and supports the overall quality management in aerospace manufacturing and maintenance operations.
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Frequently Asked Questions
SIST EN 4269:2023 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Nuts, anchor, self-locking, floating, two lug, reduced series, with counterbore, in steel, cadmium plated, MoS2 lubricated - Classification: 1 110 MPa (at ambient temperature)/235 °C". This standard covers: This document specifies the characteristics of self-locking, floating, two lug anchor nuts, reduced series, with counterbore, in steel, cadmium plated, MoS 2 lubricated. Classification: 1 100 MPa1/235 °C2
This document specifies the characteristics of self-locking, floating, two lug anchor nuts, reduced series, with counterbore, in steel, cadmium plated, MoS 2 lubricated. Classification: 1 100 MPa1/235 °C2
SIST EN 4269:2023 is classified under the following ICS (International Classification for Standards) categories: 49.030.30 - Nuts. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 4269:2023 has the following relationships with other standards: It is inter standard links to oSIST prEN 13075-2:2026, SIST EN ISO 15792-1:2008, SIST EN 2491:2011, SIST EN 840-6:2004+A1:2008, SIST EN 2424:2008, SIST EN 2133:2021. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN 4269:2023 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2023
Aeronavtika - Zakovne matice, samovarovalne, premične, dvostranske, skrajšana
serija, z izvrtino za valjaste vijake, iz jekla, prevlečene s kadmijem, namazane z
MoS2 - Klasifikacija: 1 110 MPa (pri temperaturi okolice)/235 °C
Aerospace series - Nuts, anchor, self-locking, floating, two lug, reduced series, with
counterbore, in steel, cadmium plated, MoS2 lubricated - Classification: 1 110 MPa (at
ambient temperature)/235 °C
Luft- und Raumfahrt - Annietmuttern, selbstsichernd, beweglich, beiderseitiger Flansch,
mit zylindrischer Aussenkung, aus Stahl, verkadmet, MoS2-geschmiert - Klasse: 1 100
MPa (bei Raumtemperatur)/235 °C
Série aérospatiale - Écrous à river, à freinage interne, flottants, double patte, série
réduite, avec chambrage, en acier, cadmiés, lubrifiés au MoS2 - Classification : 1 100
MPa (à température ambiante)/235 °C
Ta slovenski standard je istoveten z: EN 4269:2023
ICS:
49.030.30 Matice Nuts
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 4269
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2023
EUROPÄISCHE NORM
ICS 49.030.30
English Version
Aerospace series - Nuts, anchor, self-locking, floating, two
lug, reduced series, with counterbore, in steel, cadmium
plated, MoS2 lubricated - Classification: 1 110 MPa (at
ambient temperature)/235 °C
Série aérospatiale - Écrous à river, à freinage interne, Luft- und Raumfahrt - Annietmuttern, selbstsichernd,
flottants, double patte, série réduite, avec chambrage, beweglich, beiderseitiger Flansch, mit zylindrischer
en acier, cadmiés, lubrifiés au MoS2 - Classification: 1 Aussenkung, aus Stahl, verkadmet, MoS2-geschmiert -
100 MPa (à température ambiante)/235 °C Klasse: 1 100 MPa (bei Raumtemperatur)/235 °C
This European Standard was approved by CEN on 17 April 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
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 4269:2023 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 . 5
4.1 Configuration — Dimensions — Masses . 5
4.2 Tolerances of form and position . 5
4.3 Materials . 5
4.4 Surface treatments . 5
5 Designation. 8
6 Marking . 8
7 Technical specification . 8
Bibliography . 9
European foreword
This document (EN 4269:2023) 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 January 2024, and conflicting national standards shall
be withdrawn at the latest by January 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.
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, Cyp
...