SIST EN 2878:2018+AC:2019
(Main)Aerospace series - Nuts, anchor, self-locking, air resistant, sealing, floating, two lug, with counterbore, in alloy steel, cadmium plated, MoS2 lubricated - Classification: 900 MPa (at ambient temperature)/235 °C
Aerospace series - Nuts, anchor, self-locking, air resistant, sealing, floating, two lug, with counterbore, in alloy steel, cadmium plated, MoS2 lubricated - Classification: 900 MPa (at ambient temperature)/235 °C
This European standard specifies the characteristics of self-locking, air resistant, sealing, floating, two lug anchor nuts, with counterbore, in alloy steel, cadmium plated, MoS2 lubricated.
Classification: 900 MPa/235 °C.
Luft- und Raumfahrt - Annietmuttern, selbstsichernd, druckdicht, luftbeständig, beweglich, beiderseitiger Flansch, mit zylindrischer Aussenkung, aus legiertem Stahl, verkadmet, MoS2-geschmiert - Klasse: 900 MPa (bei Raumtemperatur)/235 °C
Diese Europäische Norm legt die Eigenschaften von selbstsichernden, luftbeständigen, abdichtenden,
beweglichen Annietmuttern mit beiderseitigem Flansch, mit zylindrischer Aussenkung, in Stahllegierung,
mit Kadmierung und MoS2-Schmierung fest.
Klasse: 900 MPa1/235 °C2.
Série aérospatiale - Écrous à river, à freinage interne, étanches à l'air, flottants, double patte, avec chambrage, en acier allié, cadmiés, lubrifiés MoS2 - Classification: 900 MPa (à température ambiante)/235 °C
La présente Norme européenne spécifie les caractéristiques des écrous à river, à freinage interne, étanches à l’air, flottants, double patte, avec chambrage, en acier allié, cadmiés, lubrifiés au MoS2.
Classification : 900 MPa 1)/235 °C2).
Aeronavtika - Zakovne matice, samozaporne, vremensko odporne, tesnjene, premične, dvostranske, z izvrtino za valjaste vijake, iz legiranega jekla, kadmirane, mazane z MoS2 - Klasifikacija: 900 MPa (pri okoljski temperaturi)/235 °C (vključno s popravkom AC)
Ta evropski standard določa lastnosti samozapornih, vremensko odpornih, tesnjenih, premičnih, dvostranskih zakovnih matic, z izvrtino za valjaste vijake, iz legiranega jekla, kadmiranih, mazanih z MoS2.
Klasifikacija: 900 MPa/235 °C.
General Information
- Status
- Published
- Publication Date
- 08-May-2019
- Technical Committee
- I13 - Imaginarni 13
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 18-Apr-2019
- Due Date
- 23-Jun-2019
- Completion Date
- 09-May-2019
Relations
- Effective Date
- 10-Apr-2019
Overview
EN 2878:2018+AC:2019 is a CEN (Aerospace series) standard that specifies the characteristics of anchor nuts used in aerospace applications. It covers self‑locking, air‑resistant, sealing, floating, two‑lug nuts with counterbore, manufactured in alloy steel, cadmium plated and MoS2 (molybdenum disulphide) lubricated. The standard defines the mechanical classification 900 MPa (at ambient temperature) / 235 °C and includes the Corrigendum (AC:2019).
Key topics and requirements
- Scope and classification
- Defines anchor nut types: two‑lug, floating, self‑locking, air‑sealing with counterbore.
- Strength class: 900 MPa at ambient temperature; maximum exposure temperature 235 °C (no permanent change after return to ambient).
- Materials
- Nut element, cage and seal retainer per TR 3791 (materials for self‑locking nuts).
- Sealing ring: rubber air‑resistant material (e.g., AMS 3304 or equivalent).
- Surface treatments
- Cadmium plating per EN 2133 (minimum deposit on contact surfaces).
- MoS2 lubrication on threads per EN 2491 (mandatory on threads).
- Dimensions and tolerances
- Dimensional data and tolerances conform to ISO 8940; tolerances of form/position per ISO 8788.
- Dimensions are specified after cadmium plating but before MoS2 lubrication.
- Quality, approval and marking
- Manufacturer approval and quality system requirements reference EN 9100; product qualification per EN 9133.
- Marking specified by EN 2424 (style N).
Practical applications and users
- Primary users
- Aerospace OEMs, structural engineers, fastener manufacturers, procurement/specification teams, and maintenance organizations.
- Typical applications
- Structural joints and assemblies in aircraft and aerospace structures where a sealed, air‑resistant fastener with floating alignment and self‑locking capability is required (e.g., panels, access doors, fittings).
- Why use this standard
- Ensures interchangeability, predictable mechanical behaviour (900 MPa class), corrosion protection (cadmium), and reliable lubrication (MoS2) for consistent installation torque and long‑term performance in aerospace environments.
Related standards
- EN 2133 (Cadmium plating)
- EN 2424 (Marking of aerospace products)
- EN 2491 (MoS2 dry lubricants)
- EN 9100 / EN 9133 (Quality and product qualification)
- ISO 5855‑2, ISO 5858, ISO 8788, ISO 8940 (thread and dimensional standards)
- TR 3791 (Materials for self‑locking nuts)
- AMS 3304 (Sealing rubber example)
EN 2878:2018+AC:2019 is essential for anyone specifying or producing two‑lug anchor nuts for aerospace use, providing harmonized requirements for materials, coatings, dimensions and quality assurance.
Frequently Asked Questions
SIST EN 2878:2018+AC:2019 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Nuts, anchor, self-locking, air resistant, sealing, floating, two lug, with counterbore, in alloy steel, cadmium plated, MoS2 lubricated - Classification: 900 MPa (at ambient temperature)/235 °C". This standard covers: This European standard specifies the characteristics of self-locking, air resistant, sealing, floating, two lug anchor nuts, with counterbore, in alloy steel, cadmium plated, MoS2 lubricated. Classification: 900 MPa/235 °C.
This European standard specifies the characteristics of self-locking, air resistant, sealing, floating, two lug anchor nuts, with counterbore, in alloy steel, cadmium plated, MoS2 lubricated. Classification: 900 MPa/235 °C.
SIST EN 2878:2018+AC:2019 is classified under the following ICS (International Classification for Standards) categories: 21.060.20 - Nuts; 49.030.30 - Nuts. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 2878:2018+AC:2019 has the following relationships with other standards: It is inter standard links to SIST EN 2878:2018. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase SIST EN 2878:2018+AC:2019 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of SIST standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-junij-2019
Nadomešča:
SIST EN 2878:2018
Aeronavtika - Zakovne matice, samozaporne, vremensko odporne, tesnjene,
premične, dvostranske, z izvrtino za valjaste vijake, iz legiranega jekla, kadmirane,
mazane z MoS2 - Klasifikacija: 900 MPa (pri okoljski temperaturi)/235 °C (vključno
s popravkom AC)
Aerospace series - Nuts, anchor, self-locking, air resistant, sealing, floating, two lug, with
counterbore, in alloy steel, cadmium plated, MoS2 lubricated - Classification: 900 MPa
(at ambient temperature)/235 °C
Luft- und Raumfahrt - Annietmuttern, selbstsichernd, druckdicht, luftbeständig,
beweglich, beiderseitiger Flansch, mit zylindrischer Aussenkung, aus legiertem Stahl,
verkadmet, MoS2-geschmiert - Klasse: 900 MPa (bei Raumtemperatur)/235 °C
Série aérospatiale - Écrous à river, à freinage interne, étanches à l'air, flottants, double
patte, avec chambrage, en acier allié, cadmiés, lubrifiés MoS2 - Classification: 900 MPa
(à température ambiante)/235 °C
Ta slovenski standard je istoveten z: EN 2878:2018+AC:2019
ICS:
21.060.20 Matice Nuts
49.030.30 Matice Nuts
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 2878:2018+AC
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2019
EUROPÄISCHE NORM
ICS 49.030.30 Supersedes EN 2878:2018
English Version
Aerospace series - Nuts, anchor, self-locking, air resistant,
sealing, floating, two lug, with counterbore, in alloy steel,
cadmium plated, MoS2 lubricated - Classification: 900 MPa
(at ambient temperature)/235 °C
Série aérospatiale - Écrous à river, à freinage interne, Luft- und Raumfahrt - Annietmuttern, selbstsichernd,
étanches à l'air, flottants, double patte, avec druckdicht, luftbeständig, beweglich, beiderseitiger
chambrage, en acier allié, cadmiés, lubrifiés MoS2 - Flansch, mit zylindrischer Aussenkung, aus legiertem
Classification: 900 MPa (à température ambiante)/235 Stahl, verkadmet, MoS2-geschmiert - Klasse: 900 MPa
°C (bei Raumtemperatur)/235 °C
This European Standard was approved by CEN on 11 June 2018 and includes the Corrigendum issued by CEN on 10 April 2019.
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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATIO N
EUROPÄISCHES KOMITEE FÜR NORMUN G
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 2878:2018+AC:2019 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Required characteristics . 5
4 Designation. 8
5 Marking . 8
6 Technical specification . 8
European foreword
This document (EN 2878:2018+AC:2019) 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 Standard 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 October 2019, and conflicting national standards shall
be withdrawn at the latest by October 2019.
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 incl
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