SIST EN 2881:2009
(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
- 09-Sep-2009
- Technical Committee
- I13 - Imaginarni 13
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 29-Apr-2009
- Due Date
- 04-Jul-2009
- Completion Date
- 10-Sep-2009
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
SIST EN 2881:2009 is a European standard specifying the characteristics of self-locking, fuel-resistant, sealing, floating anchor nuts with two lugs and counterbore, produced from corrosion resistant steel, passivated, and lubricated with molybdenum disulphide (MoS₂). Issued by SIST, this standard applies to nuts within the metric series, classified for a minimum tensile strength of 900 MPa (at ambient temperature) and operational stability up to 120 °C. These specialized anchor nuts are vital in aerospace engineering where secure fastening, durability under stress, and resistance to fuels and harsh environments are essential.
Key Topics
- Self-Locking Mechanism: Ensures vibration resistance and prevents loosening under dynamic loads, critical in aerospace applications.
- Fuel Resistance and Sealing: Incorporates a fuel-resistant sealing ring and features a design to prevent leakage, providing secure fastening even in contact with aviation fuels.
- Floating Design: The floating nut element accommodates slight misalignment between components and fasteners, reducing assembly time and compensating for tolerances.
- Corrosion Resistant Steel: Used for longevity and structural integrity in demanding aerospace environments; steel is passivated for additional protection.
- MoS₂ Lubrication: Molybdenum disulphide dry lubricant applied to threads for decreased friction and reduced galling during installation.
- Two Lug, Counterbore Structure: Anchor nuts with two lugs for secure riveting; the counterbore design facilitates proper seating and resistance to tearing during installation.
- Metric Thread Series: Conforms to metric dimensions and tolerances, aiding integration across global aerospace supply chains.
Applications
These anchor nuts are specifically tailored for the aerospace sector, including:
- Aircraft Structures: Used on airframes and interiors where secure and sealed connections are mandatory, especially in fuel systems and areas prone to exposure to chemicals or vibration.
- Engines and Fuel Tanks: Ensures leak-proof fastening on engine mounts and fuel containment areas, benefiting from the high fuel resistance and sealing.
- Aerospace Assemblies: Applicable in satellite components, UAVs, and defense equipment wherever robust and reliable fasteners are required.
- Maintenance and Retrofitting: The floating design and standardized metric sizes make these nuts compatible with maintenance, repair, and overhaul operations.
Related Standards
To provide complete compliance and compatibility in aerospace manufacturing and maintenance, the following related international and European standards are referenced or closely associated with SIST EN 2881:2009:
- ISO 5855-2: Dimensional limits for MJ threads (bolts and nuts) used in aerospace.
- ISO 8788: Metric aerospace nuts – tolerances of form and position.
- ISO 8940: Lists nuts with similar characteristics and their classification by mechanical and temperature ratings.
- EN 2424: Marking requirements for aerospace products for traceability.
- EN 2491: Specifications for MoS₂ lubricant coating methods.
- EN 2516: Guidelines for passivation of corrosion resistant steel.
- EN 9100: Quality management systems specific to aerospace, based on ISO 9001.
- EN 9133: Qualification procedures for aerospace standard parts.
For organizations in aerospace manufacturing and supply, adoption of SIST EN 2881:2009 ensures reliability, safety, and compatibility with international procurement and maintenance standards. The document plays a critical role in achieving compliance, reducing operational risk, and supporting robust product design in high-demand environments.
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Frequently Asked Questions
SIST EN 2881:2009 is a standard published by the Slovenian Institute for Standardization (SIST). 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
SIST EN 2881:2009 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 2881:2009 has the following relationships with other standards: It is inter standard links to SIST EN ISO 4628-8:2014, SIST EN 9100:2018, SIST EN 9133:2018, SIST EN ISO 15792-1:2008, SIST EN 2491:2011, SIST EN 840-6:2004+A1:2008, SIST EN 2516:2024, SIST EN 2424:2008. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN 2881:2009 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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