EN 2754:2006
(Main)Aerospace series - Nuts, anchor, self locking, two lug, floating with counterbore - Classification: 1 100 MPa/235 °C
Aerospace series - Nuts, anchor, self locking, two lug, floating with counterbore - Classification: 1 100 MPa/235 °C
This standard specifies the characteristics of two lug, counterbored, floating anchor nuts, with a self-locking feature achieved by forming the upper portion out-of-round, the dimensions of which are in conformity with ISO 3209.
These nuts are intended for use in aircraft assemblies, in which the fasteners are mainly subjected to shear loads. The counterbore of nuts with thread diameter equal to or greater than 4 mm is deep enough to accommodate a bolt shank in excess of assembly thickness, as well as the incomplete threads.
The 3 mm diameter nut has no counterbore.
They are intended to be used with threaded parts of 1 100 MPa ) tensile strength classification.
The cadmium plating restricts the application to temperatures not exceeding 235 °C.
Luft- und Raumfahrt - Gehäuse-Annietmuttern, selbstsichernd, beweglich, beiderseitiger Flansch mit zylindrischer Aussenkung - Klasse: 1 100 MPa/235 °C
Diese Norm legt die Eigenschaften für Gehäuse-Annietmuttern mit beiderseitigem Flansch, zylindrischer Aussenkung, beweglich, selbstsichernd durch den unrund geformten oberen Abschnitt mit den Maßen nach ISO 3209, fest.
Diese Muttern sind für die Anwendung bei der Montage von Luftfahrzeugen vorgesehen, wo die Verbindungs¬elemente hauptsächlich den Scherbeanspruchungen ausgesetzt sind. Die Aussenkung von Muttern mit Gewindedurchmesser gleich oder größer 4 mm ist tief genug, um einen Bolzenschaft, der länger als die Dicke der zu montierenden Teile ist, sowie unvollständige Gewinde aufzunehmen.
Die Mutter mit einem Durchmesser von 3 mm hat keine Aussenkung.
Die Muttern sind für die Anwendung mit den Gewindeteilen der Zugfestigkeitsklasse von 1 100 MPa ) vorge¬sehen.
Das Verkadmen begrenzt die Anwendung auf Temperaturen nicht höher als 235 °C.
Série aérospatiale - Écrous à river à freinage interne flottants, double patte avec chambrage - Classification : 1 100 MPa/235 °C
Aeronavtika - Zakovne matice, samovarovalne, dvostranske, premične, z izvrtino za valjaste vijake - Klasifikacija: 1100 MPa/235 °C
General Information
- Status
- Published
- Publication Date
- 25-Apr-2006
- Withdrawal Date
- 30-Oct-2006
- Technical Committee
- ASD-STAN - Aerospace
- Drafting Committee
- ASD-STAN/D 3 - Mechanical
- Current Stage
- 9093 - Decision to confirm - Review Enquiry
- Start Date
- 31-May-2017
- Completion Date
- 21-Jan-2026
Relations
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
Overview
EN 2754:2006 specifies requirements for aerospace two-lug, floating anchor nuts with a counterbore and a self‑locking feature. These anchor nuts (two lug, floating, self‑locking) are dimensionally compliant with ISO 3209 and are classified for use with threaded parts of 1100 MPa tensile strength. The standard limits cadmium‑plated applications to temperatures not exceeding 235 °C.
Key topics and technical requirements
- Configuration and dimensions: Geometry and tolerances conform to ISO 3209; specific dimension tables cover MJ thread sizes (e.g., MJ 3, 4, 5, 6, 8, 10).
- Self‑locking feature: Achieved by forming the upper portion out‑of‑round in the designated zone (as specified in the figure), providing prevailing torque without separate inserts.
- Counterbore details: Nuts with thread diameter ≥ 4 mm have a counterbore deep enough to accommodate bolt shank and incomplete threads; the MJ 3 nut has no counterbore.
- Materials: Steel per EN 2542 or EN 2543.
- Surface treatment: Cadmium plating per EN 2133 with a minimum 5 µm deposit on threads and all areas contactable by a 20 mm ball; continuous deposit elsewhere. Molybdenum disulfide (MoS2) lubrication per EN 2491 is mandatory on threads, optional elsewhere. Cadmium limits service temperature to ≤ 235 °C.
- Form and position tolerances: In accordance with ISO 8788.
- Threads and related specs: Use MJ thread requirements from ISO 5855 (Parts 1 & 2) and procurement/specification guidance from ISO 5858 where applicable.
- Marking and designation: Marking per EN 2424 (Style F). Example designation: “NUT, ANCHOR - EN2754–060” with optional hole codes for plain or dimpled rivet holes.
- Inspection & QA: Dimensions and surface roughness apply before plating/lubrication; quality assurance references EN 9100 and ISO 5858 for procurement criteria.
Applications - who uses this standard
- Aerospace fastener manufacturers specifying and producing floating anchor nuts for aircraft structures.
- Design and structural engineers selecting nuts for assemblies primarily subjected to shear loads.
- Procurement, quality assurance, and maintenance teams ensuring interchangeability, traceability and compliance with aerospace material and plating requirements.
- Suppliers specifying compatibility with 1100 MPa threaded components and temperature limitations due to cadmium plating.
Related standards
- ISO 3209, ISO 5855‑1/2, ISO 5858, ISO 8788
- EN 2133 (cadmium plating), EN 2491 (MoS2 lubrication), EN 2542 / EN 2543 (steel grades)
- EN 2424 (marking), EN 9100 (quality management)
Keywords: EN 2754:2006, aerospace anchor nuts, two‑lug floating nut, self‑locking nut, counterbore, 1100 MPa, cadmium plating, MJ threads, ISO 3209.
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Frequently Asked Questions
EN 2754:2006 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Nuts, anchor, self locking, two lug, floating with counterbore - Classification: 1 100 MPa/235 °C". This standard covers: This standard specifies the characteristics of two lug, counterbored, floating anchor nuts, with a self-locking feature achieved by forming the upper portion out-of-round, the dimensions of which are in conformity with ISO 3209. These nuts are intended for use in aircraft assemblies, in which the fasteners are mainly subjected to shear loads. The counterbore of nuts with thread diameter equal to or greater than 4 mm is deep enough to accommodate a bolt shank in excess of assembly thickness, as well as the incomplete threads. The 3 mm diameter nut has no counterbore. They are intended to be used with threaded parts of 1 100 MPa ) tensile strength classification. The cadmium plating restricts the application to temperatures not exceeding 235 °C.
This standard specifies the characteristics of two lug, counterbored, floating anchor nuts, with a self-locking feature achieved by forming the upper portion out-of-round, the dimensions of which are in conformity with ISO 3209. These nuts are intended for use in aircraft assemblies, in which the fasteners are mainly subjected to shear loads. The counterbore of nuts with thread diameter equal to or greater than 4 mm is deep enough to accommodate a bolt shank in excess of assembly thickness, as well as the incomplete threads. The 3 mm diameter nut has no counterbore. They are intended to be used with threaded parts of 1 100 MPa ) tensile strength classification. The cadmium plating restricts the application to temperatures not exceeding 235 °C.
EN 2754:2006 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 2754:2006 has the following relationships with other standards: It is inter standard links to EN 13001-2:2004/AC:2006, EN 2491:2011. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 2754:2006 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 - Gehäuse-Annietmuttern, selbstsichernd, beweglich, beiderseitiger Flansch mit zylindrischer Aussenkung - Klasse: 1100 MPa/235 °CSérie aérospatiale - Écrous à river à freinage interne flottants, double patte avec chambrage - Classification: 1100 MPa/235 °CAerospace series - Nuts, anchor, self locking, two lug, floating with counterbore - Classification: 1100 MPa/235 °C49.030.30MaticeNutsICS:Ta slovenski standard je istoveten z:EN 2754:2006SIST EN 2754:2009en,de01-september-2009SIST EN 2754:2009SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 2754
April 2006 ICS 49.030.30 English Version
Aerospace series - Nuts, anchor, self locking, two lug, floating with counterbore - Classification: 1 100 MPa/235 °C
Série aérospatiale - Écrous à river à freinage interne flottants, double patte avec chambrage - Classification : 1 100 MPa/235 °C
Luft- und Raumfahrt - Gehäuse-Annietmuttern, selbstsichernd, beweglich, beiderseitiger Flansch mit zylindrischer Aussenkung - Klasse: 1 100 MPa/235 °C This European Standard was approved by CEN on 9 March 2006.
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 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 translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions.
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 STANDARDIZATION
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B-1050 Brussels © 2006 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 2754:2006: ESIST EN 2754:2009
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