SIST EN 2880:2018+AC:2019

Aerospace series - Nuts, anchor, self-locking, fuel resistant, sealing, floating, two lug, with counterbore, in alloy steel, cadmium plated, MoS₂ lubricated - Classification: 900 MPa (at ambient temperature) / 120 °C

This European standard specifies the characteristics of self-locking, fuel resistant, sealing, floating, two lug anchor nuts, with counterbore, in alloy steel, cadmium plated, MoS2 lubricated.
Classification: 900 MPa/120 °C.

Luft- und Raumfahrt - Annietmuttern, selbstsichernd, druckdicht, kraftstoffbeständig, beweglich, beiderseitiger Flansch, mit zylindrischer Aussenkung, aus legiertem Stahl, verkadmet, MoS₂-geschmiert - Klasse: 900 MPa (bei Raumtemperatur) / 120 °C

Diese Europäische Norm legt die Eigenschaften von selbstsichernden, kraftstoffbeständigen, abdichtenden,
beweglichen Annietmuttern mit beiderseitigem Flansch, mit zylindrischer Aussenkung, in Stahllegierung,
mit Kadmierung und MoS2-Schmierung fest.
Klasse: 900 MPa1/120 °C2.

Série aérospatiale - Écrous à river, à freinage interne, étanches au carburant, flottants, double patte, avec chambrage, en acier allié, cadmiés, lubrifiés MoS₂ - Classification: 900 MPa (à température ambiante) / 120 °C

La présente Norme européenne spécifie les caractéristiques des écrous à river, à freinage interne, étanches au carburant, flottants, double patte, avec chambrage, en acier allié, cadmiés, lubrifiés au MoS2.
Classification : 900 MPa1)/120 °C2).

Aeronavtika - Zakovne matice, samozaporne, odporne proti gorivu, tesnjene, premične, dvostranske, z izvrtino za valjaste vijake, iz legiranega jekla, kadmirane, mazane z MoS2 - Klasifikacija: 900 MPa (pri okoljski temperaturi)/120 °C (vključno s popravkom AC)

Ta evropski standard določa lastnosti samozapornih, proti gorivu odpornih, tesnjenih, premičnih, dvostranskih zakovnih matic, z izvrtino za valjaste vijake, iz legiranega jekla, kadmiranih, mazanih z MoS2.
Klasifikacija: 900 MPa/120 °C.

General Information

• Status: Published
• Publication Date: 08-May-2019
• ICS: 21.060.20 - Nuts
• ICS: 49.030.30 - Nuts
• 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
• Ref Project: EN 2880:2018+AC:2019 - Aerospace series - Nuts, anchor, self-locking, fuel resistant, sealing, floating, two lug, with counterbore, in alloy steel, cadmium plated, MoS₂ lubricated - Classification: 900 MPa (at ambient temperature) / 120 °C

Relations

• Replaces: SIST EN 2880:2018 - Aerospace series - Nuts, anchor, self-locking, fuel resistant, sealing, floating, two lug, with counterbore, in alloy steel, cadmium plated, MoS₂ lubricated - Classification: 900 MPa (at ambient temperature) / 120 °C
• Effective Date: 18-Apr-2019
• Merged From: SIST EN 2880:2018 - Aerospace series - Nuts, anchor, self-locking, fuel resistant, sealing, floating, two lug, with counterbore, in alloy steel, cadmium plated, MoS₂ lubricated - Classification: 900 MPa (at ambient temperature) / 120 °C
• Effective Date: 16-Jan-2023
• Refers: SIST EN 9100:2018 - Quality Management Systems - Requirements for Aviation, Space and Defense Organizations
• Effective Date: 28-Jan-2026
• Refers: SIST EN 9133:2018 - Aerospace series - Quality Management Systems - Qualification Procedure for Aerospace Standard Products
• Effective Date: 28-Jan-2026
• Refers: SIST EN ISO 15792-1:2008 - Welding consumables - Test methods - Part 1: Test methods for all-weld metal test specimens in steel, nickel and nickel alloys (ISO 15792-1:2000)
• Effective Date: 28-Jan-2026
• Refers: SIST EN 2491:2011 - Aerospace series - Molybdenum disulphide dry lubricants - Coating methods
• Effective Date: 28-Jan-2026
• Refers: SIST EN 840-6:2004+A1:2008 - Mobile waste containers - Part 6: Safety and health requirements
• Effective Date: 28-Jan-2026
• Refers: SIST EN 2424:2008 - Aerospace series - Marking of aerospace products
• Effective Date: 28-Jan-2026
• Refers: SIST EN 2133:2021 - Aerospace series - Cadmium plating of steels with specified tensile strength ≤ 1 450 MPa, copper, copper alloys and nickel alloys
• Effective Date: 28-Jan-2026
• Refers: SIST EN ISO 4628-8:2014 - Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and size of defects, and of intensity of uniform changes in appearance - Part 8: Assessment of degree of delamination and corrosion around a scribe or other artificial defect (ISO 4628-8:2012)
• Effective Date: 28-Jan-2026
• Referred By: SIST EN ISO 536:2020 - Paper and board - Determination of grammage (ISO 536:2019)
• Effective Date: 28-Jan-2026

Overview

SIST EN 2880:2018+AC:2019 is a critical European standard developed by CEN for the aerospace industry, specifying the requirements for anchor nuts that are self-locking, fuel resistant, sealing, floating, with two lugs and a counterbore, manufactured in alloy steel, cadmium plated, and MoS₂ lubricated. These anchor nuts are designed for high reliability under demanding operating conditions, classified for a minimum tensile strength of 900 MPa at ambient temperature and capable of withstanding up to 120°C.

These components play a key role in aerospace applications where secure, vibration-resistant, fuel-tight fastening is necessary, contributing to both safety and performance in aircraft, helicopters, and other aerospace systems.

Key Topics

• Self-Locking Mechanism: Provides resistance to loosening under vibration, essential in dynamic aerospace environments.
• Fuel Resistance: Utilizes a sealing ring made of rubber per MIL-R-6855, ensuring compatibility with aviation fuels and preventing leaks.
• Sealing and Floating Features: Offers a secure seal against fluid ingress and compensates for slight misalignment between parts, thanks to its floating design.
• Material and Surface Treatments: Made from high-strength alloy steel for durability, with cadmium plating (EN 2133) for corrosion resistance, and MoS₂ lubrication (EN 2491) for smooth installation and operation.
• Two-Lug Anchor and Counterbore: Enables secure and robust mounting to aircraft structures, suitable for applications where access is limited to one side.
• Classification: Rated for 900 MPa minimum tensile strength at ambient temperature and operational integrity up to 120°C.

Applications

EN 2880 anchor nuts are widely used in the following aerospace scenarios:

• Aircraft Structures: Fastening panels, covers, and access doors where fuel resistance and vibration-proof performance are required.
• Helicopter Assemblies: Mounting critical components exposed to fuel, heat, and mechanical stress.
• Fuel Systems: Ensuring leak-proof connections in fuel tanks and lines, where resistance to aviation fuel and sealed performance are crucial.
• Maintenance and Retrofit: Used where high reliability and standardization are important for safety and interchangeability during repairs or component upgrades.

The standard ensures that nuts meeting its requirements are interchangeable, reliable, and compatible with international aerospace assembly procedures, making them essential for manufacturers and maintenance teams.

Related Standards

For comprehensive compliance and compatibility, consider the following related standards:

• EN 2133: Aerospace series - Cadmium plating of steels with specified tensile strength ≤ 1450 MPa.
• EN 2424: Aerospace series - Marking of aerospace products.
• EN 2491: Aerospace series - Molybdenum disulphide dry lubricants - Coating methods.
• EN 9100: Quality Management Systems - Requirements for aviation, space, and defence organizations.
• EN 9133: Qualification procedure for aerospace standard products.
• ISO 5855-2: Aerospace - MJ threads - Part 2: Limit dimensions for bolts and nuts.
• ISO 5858: Aerospace - Nuts, self-locking, with a maximum operating temperature ≤ 425°C.
• ISO 8788: Metric nuts - Tolerances of form and position.
• ISO 8940: Nuts, anchor, self-locking, sealing, floating, with MJ threads.
• TR 3791: Materials for self-locking nuts and threaded inserts, temperature classes up to 425°C.

Conclusion

SIST EN 2880:2018+AC:2019 ensures high standards of performance, safety, and compatibility for aerospace anchor nuts. Its rigorous requirements allow manufacturers and maintenance teams to reliably select, install, and maintain critical fasteners in fuel-exposed and high-stress environments, supporting the long-term integrity of aerospace structures and components.

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-2019
Nadomešča:
SIST EN 2880:2018
Aeronavtika - Zakovne matice, samozaporne, odporne proti gorivu, tesnjene,
premične, dvostranske, z izvrtino za valjaste vijake, iz legiranega jekla, kadmirane,
mazane z MoS2 - Klasifikacija: 900 MPa (pri okoljski temperaturi)/120 °C (vključno
s popravkom AC)
Aerospace series - Nuts, anchor, self-locking, fuel resistant, sealing, floating, two lug,
with counterbore, in alloy steel, cadmium plated, MoS₂ lubricated - Classification: 900
MPa (at ambient temperature) / 120 °C
Luft- und Raumfahrt - Annietmuttern, selbstsichernd, druckdicht, kraftstoffbeständig,
beweglich, beiderseitiger Flansch, mit zylindrischer Aussenkung, aus legiertem Stahl,
verkadmet, MoS₂-geschmiert - Klasse: 900 MPa (bei Raumtemperatur) / 120 °C
Série aérospatiale - Écrous à river, à freinage interne, étanches au carburant, flottants,
double patte, avec chambrage, en acier allié, cadmiés, lubrifiés MoS₂ - Classification:
900 MPa (à température ambiante) / 120 °C
Ta slovenski standard je istoveten z: EN 2880:2018+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 2880:2018+AC
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2019
EUROPÄISCHE NORM
ICS 49.030.30 Supersedes EN 2880:2018
English Version
Aerospace series - Nuts, anchor, self-locking, fuel resistant,
sealing, floating, two lug, with counterbore, in alloy steel,
cadmium plated, MoS2 lubricated - Classification: 900 MPa
(at ambient temperature) / 120 °C
Série aérospatiale - Écrous à river, à freinage interne, Luft- und Raumfahrt - Annietmuttern, selbstsichernd,
étanches au carburant, flottants, double patte, avec druckdicht, kraftstoffbeständig, beweglich,
chambrage, en acier allié, cadmiés, lubrifiés MoS2 - beiderseitiger Flansch, mit zylindrischer Aussenkung,
Classification: 900 MPa (à température ambiante) / aus legiertem Stahl, verkadmet, MoS2-geschmiert -
120 °C Klasse: 900 MPa (bei Raumtemperatur) / 120 °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

E U R OP ÄISCHES 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 2880:2018+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 2880:2018+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 docu
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