EN 2881:2006
(Main)Aerospace series - Nuts, anchor, self-locking, fuel resistant, sealing, floating, two lug, with counterbore, in corrosion resisting steel, passivated, MoS2 lubricated, metric series - Classification: 900 MPa (at ambient temperature) / 120 °C
Aerospace series - Nuts, anchor, self-locking, fuel resistant, sealing, floating, two lug, with counterbore, in corrosion resisting steel, passivated, MoS2 lubricated, metric series - Classification: 900 MPa (at ambient temperature) / 120 °C
This standard specifies the characteristics of self-locking, fuel resistant, sealing, floating, two lug anchor nuts, with counterbore, in corrosion resisting steel, passivated, MoS2 lubricated.
Classification: 900 MPa / 120 °C
Luft- und Raumfahrt - Annietmuttern, selbstsichernd, kraftstoffbeständing, druckdicht, beweglich, beiderseitiger Flansch, mit zylindrischer Aussenkung, aus korrosionsbeständigem Stahl, passiviert, MoS2-geschmiert, metrische Reihe - Klasse: 900 MPa (bei Raumtemperatur) / 120 °C
Diese Norm legt die Eigenschaften für Annietmuttern, selbstsichernd, kraftstoffbeständig, druckdicht, beweg¬lich, beiderseitiger Flansch, mit zylindrischer Aussenkung, aus korrosionsbeständigem Stahl, passiviert, MoS2-geschmiert, metrische Reihe, fest.
Klasse: 900 MPa )/120 °C )
Série aérospatiale - Écrous à river, à freinage interne, étanches au carburant, flottants, double patte, avec chambrage, en acier résistant à la corrosion, passivés, lubrifiés MoS2, série métrique - Classification : 900 MPa (à température ambiante) / 120 °C
Aeronavtika - Zakovne matice, samozapiralne, odporne proti gorivu, tesnjene, premične, dvostranske, z izvrtino za valjaste vijake, iz korozijsko odpornega jekla, pasivirane, mazane z MoS2, metrska serija - Klasifikacija: 900 MPa (pri temperaturi okolice)/120 °C
General Information
- Status
- Published
- Publication Date
- 16-May-2006
- Withdrawal Date
- 29-Nov-2006
- Technical Committee
- ASD-STAN - Aerospace
- Drafting Committee
- ASD-STAN/D 3 - Mechanical
- Current Stage
- 9093 - Decision to confirm - Review Enquiry
- Completion Date
- 31-May-2022
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
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
Overview
EN 2881:2006 specifies the characteristics of metric aerospace anchor nuts that are self-locking, fuel resistant, sealing, floating, two‑lug, with a counterbore, made from corrosion‑resisting steel, passivated and MoS2‑lubricated. The series is classified 900 MPa (ambient) / 120 °C, indicating the minimum tensile stress performance and the maximum service temperature (conditioned by the seal material).
These components are defined for aerospace use where secure fastening, fuel integrity and resistance to environmental attack are required. The standard covers configuration, required characteristics, marking and applicable technical specifications.
Key Topics
- Scope & classification: Metric series; classification 900 MPa / 120 °C (see notes in standard for interpretation).
- Materials: Nut element, cage and seal retainer per TR 3791; sealing ring: fuel‑resistant rubber per MIL‑R‑6855 (class 1, grade 60) or equivalent.
- Surface treatments: Passivation per EN 2516 for cage and seal retainer; nut element requires MoS2 dry lubrication and thread treatment per EN 2491 (mandatory on threads).
- Design & dimensions: Dimensions and tolerances referenced to ISO 8940 and ISO 5855‑2; tolerances of form and position per ISO 8788.
- Functional features: Floating nut element with a minimum radial float of 0.5 mm, sealing ring and anti‑rotational device (form at manufacturer’s option).
- Marking & designation: Marking per EN 2424; designation format includes the EN number and diameter code (example: EN2881‑060).
- Quality & procurement: Manufacturer approval and quality systems per EN 9100; product qualification per EN 9133; technical procurement guidance aligns with ISO 5858.
Applications
- Fastening and retention in aerospace fuel systems where fuel resistance, sealing and prevention of loosening are critical.
- Structural and secondary assemblies exposed to fuel, temperature cycling up to the classification limit and environments demanding corrosion resistance.
- Maintenance, overhaul and replacement parts procurement for fleets requiring standardized, qualified hardware.
Benefits include consistent performance under vibration and temperature exposure, controlled lubrication (MoS2) for predictable torque characteristics, and documented material and surface treatment requirements to support traceability and durability.
Related Standards
- ISO 5855‑2 - MJ threads limit dimensions for bolts and nuts
- ISO 5858 - Self‑locking nuts procurement specification
- ISO 8788 - Tolerances of form and position for nuts
- ISO 8940 - Dimensions for anchor nuts with MJ threads
- EN 2424 - Marking of aerospace products
- EN 2491 - MoS2 dry lubricants - coating methods
- EN 2516 - Passivation of corrosion resisting steels
- EN 9100 / EN 9133 - Quality systems and product qualification
- MIL‑R‑6855 - Fuel‑resistant rubber material spec
- AECMA TR 3791 - Materials for self‑locking nuts and inserts
For procurement, design and maintenance teams, EN 2881:2006 provides the documented baseline to select and specify anchor nuts that meet aerospace fuel‑system sealing and mechanical performance requirements.
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Frequently Asked Questions
EN 2881:2006 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Nuts, anchor, self-locking, fuel resistant, sealing, floating, two lug, with counterbore, in corrosion resisting steel, passivated, MoS2 lubricated, metric series - Classification: 900 MPa (at ambient temperature) / 120 °C". This standard covers: This standard specifies the characteristics of self-locking, fuel resistant, sealing, floating, two lug anchor nuts, with counterbore, in corrosion resisting steel, passivated, MoS2 lubricated. Classification: 900 MPa / 120 °C
This standard specifies the characteristics of self-locking, fuel resistant, sealing, floating, two lug anchor nuts, with counterbore, in corrosion resisting steel, passivated, MoS2 lubricated. Classification: 900 MPa / 120 °C
EN 2881:2006 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.
EN 2881:2006 has the following relationships with other standards: It is inter standard links to EN 2424:2008, EN 9133:2018, EN 9100:2018, EN ISO 15792-1:2008, EN 840-6:2004+A1:2008, EN 2491:2011, EN ISO 4628-8:2012, EN 2516:2023. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 2881:2006 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)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Luft- und Raumfahrt - Annietmuttern, selbstsichernd, kraftstoffbeständing, druckdicht, beweglich, beiderseitiger Flansch, mit zylindrischer Aussenkung, aus korrosionsbeständigem Stahl, passiviert, MoS2-geschmiert, metrische Reihe - Klasse: 900 MPa (bei Raumtemperatur)/120 °CSérie aérospatiale - Écrous à river, à freinage interne, étanches au carburant, flottants, double patte, avec chambrage, en acier résistant à la corrosion, passivés, lubrifiés MoS2, série métrique - Classification: 900 MPa (à température ambiante)/120 °CAerospace series - Nuts, anchor, self-locking, fuel resistant, sealing, floating, two lug, with counterbore, in corrosion resisting steel, passivated, MoS2 lubricated, metric series - Classification: 900 MPa (at ambient temperature)/120 °C49.030.30MaticeNutsICS:Ta slovenski standard je istoveten z:EN 2881:2006SIST EN 2881:2009en,de01-oktober-2009SIST EN 2881:2009SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 2881May 2006ICS 49.030.30 English VersionAerospace series - Nuts, anchor, self-locking, fuel resistant,sealing, floating, two lug, with counterbore, in corrosion resistingsteel, passivated, MoS2 lubricated - Classification: 900 MPa (atambient temperature) / 120
CSérie aérospatiale - Écrous à river, à freinage interne,étanches au carburant, flottants, double patte, avecchambrage, en acier résistant à la corrosion, passivés,lubrifiés MoS2, série métrique - Classification : 900 MPa (àtempérature ambiante) / 120
CLuft- und Raumfahrt - Annietmuttern, selbstsichernd,druckdicht, kraftstoffbeständing, beweglich, beiderseitigerFlansch, mit zylindrischer Aussenkung, auskorrosionsbeständigem Stahl, passiviert, MoS2-geschmiert- Klasse: 900 MPa (bei Raumtemperatur) / 120
CThis European Standard was approved by CEN on 6 February 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 2881:2006: ESIST EN 2881:2009
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