Aerospace series - Nuts, anchor, self-locking, floating, self-aligning, two lug, in alloy steel, cadmium plated, MoS2 lubricated, metric series - Classification: 900 MPa (at ambient temperature) / 235 °C

This standard specifies the characteristics of self-locking, floating, self-aligning, two lug anchor nuts, in alloy steel, cadmium plated, MoS2-lubricated.
Classification: 900 MPa  / 235 °C

Luft- und Raumfahrt - Annietmuttern, selbstsichernd, schwenkbar, beiderseitiger Flansch, aus legiertem Stahl, verkadmet, MoS2-geschmiert, metrische Reihe - Klasse: 900 MPa (bei Raumtemperatur) / 235 °C

Diese Norm legt die Eigenschaften für Annietmuttern, selbstsichernd, schwenkbar, beiderseitiger Flansch, aus legiertem Stahl, verkadmet, MoS2-geschmiert, metrische Reihe, fest.
Klasse: 900 MPa )/235 °C )

Série aérospatiale - Écrous à river, à freinage interne, flottants, orientables, double patte, en acier allié, cadmiés, lubrifiés MoS2, série métrique - Classification: 900 MPa (à température ambiante) / 235 °C

Aeronavtika - Zakovne matice, samozapiralne, premične, samovarovalne, dvostranske, iz legiranega jekla, prevlečene s kadmijem, namazane z MoS2, metrska serija - Klasifikacija: 900 MPa (pri temperaturi okolice)/235 °C

General Information

Status
Published
Publication Date
20-Apr-2009
ICS
49.030.30 - Nuts
Technical Committee
I13 - Imaginarni 13
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
09-Apr-2009
Due Date
14-Jun-2009
Completion Date
21-Apr-2009
Ref Project
EN 2680:2006 - Aerospace series - Nuts, anchor, self-locking, floating, self-aligning, two lug, in alloy steel, cadmium plated, MoS2 lubricated, metric series - Classification: 900 MPa (at ambient temperature) / 235 °C

Overview

SIST EN 2680:2009 is a European aerospace standard that specifies the characteristics of self-locking, floating, self-aligning, two lug anchor nuts made of alloy steel. These nuts feature cadmium plating and molybdenum disulphide (MoS2) lubrication, designed for metric series applications. Classified for a tensile strength of 900 MPa at ambient temperature and capable of enduring temperatures up to 235 °C, this standard ensures high-performance fastening components suitable for demanding aerospace environments.

Developed by the European Association of Aerospace Manufacturers (AECMA) and adopted by CEN, EN 2680 ensures consistent quality, reliability, and interoperability of critical aerospace fasteners. The nuts covered by this standard withstand mechanical stresses while maintaining locking integrity, even under thermal exposure consistent with aviation requirements.

Key Features

  • Self-locking and self-aligning: Enables secure fastening with tolerance for alignment variations, improving joint reliability.
  • Floating two lug design: Allows for angular adjustment to compensate for misalignments during assembly.
  • Alloy steel construction: Offers high strength and durability, supporting a classification tensile strength of 900 MPa at room temperature.
  • Cadmium plating: Provides corrosion resistance and ensures longevity of the nut in harsh aerospace operating conditions.
  • Molybdenum disulphide (MoS2) lubrication: Reduces friction for optimal performance under torque during installation.
  • Metric thread series: Conforms to aerospace metric threading standards outlined in ISO 12273.

Applications

EN 2680 anchor nuts are primarily used in aerospace manufacturing and maintenance, contributing to the safety and structural integrity of aircraft. Their features make them ideal for:

  • Aircraft assembly: Providing reliable fastening for structural components where precise torque and alignment are essential.
  • Maintenance and repair: Facilitating replacement and servicing of components requiring dependable locking nuts under variable stress and temperature conditions.
  • Aerospace equipment manufacturing: Ensuring consistency and compatibility in high-strength fastening solutions within aerospace systems.
  • High-temperature environments: Withstanding exposure up to 235 °C without compromising mechanical properties, suitable for engine compartments and other thermal zones.

Related Standards

EN 2680 interfaces with several other key aerospace standards that govern thread dimensions, quality management, coatings, and material properties:

  • ISO 12273: Defines dimensional requirements and classifications for two lug anchor nuts with metric threads.
  • ISO 5858: Procurement specifications for aerospace self-locking nuts operating below 425 °C.
  • EN 2133: Specifies requirements for cadmium plating on aerospace-grade steels.
  • EN 2491: Details the coating methods for MoS2 dry lubricants applied to aerospace fasteners.
  • EN 9100 & EN 9133: Standards for aerospace quality management systems and qualification procedures for aerospace standard parts.
  • TR 3791: Technical report specifying materials for self-locking nuts and inserts with temperature classifications up to 425 °C.

Practical Value

Compliance with SIST EN 2680:2009 guarantees that anchor nuts utilized in aerospace applications meet stringent performance, durability, and safety criteria. The standardized classification at 900 MPa tensile strength and cadmium plated MoS2 lubrication allows engineers and manufacturers to select fasteners optimized for high-stress environments and temperature endurance. Adoption of this standard supports interoperability across international aerospace supply chains and helps maintain rigorous quality assurance through defined testing and manufacturer approval processes.

Keywords: EN 2680, aerospace nuts, self-locking nuts, floating two lug nuts, alloy steel nuts, cadmium plated nuts, MoS2 lubricated nuts, aerospace fasteners, high strength nuts, metric aerospace nuts, anchor nuts standard, aerospace hardware, high temperature nuts, aerospace manufacturing standards.

Frequently Asked Questions

SIST EN 2680:2009 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Nuts, anchor, self-locking, floating, self-aligning, two lug, in alloy steel, cadmium plated, MoS2 lubricated, metric series - Classification: 900 MPa (at ambient temperature) / 235 °C". This standard covers: This standard specifies the characteristics of self-locking, floating, self-aligning, two lug anchor nuts, in alloy steel, cadmium plated, MoS2-lubricated. Classification: 900 MPa / 235 °C

This standard specifies the characteristics of self-locking, floating, self-aligning, two lug anchor nuts, in alloy steel, cadmium plated, MoS2-lubricated. Classification: 900 MPa / 235 °C

SIST EN 2680:2009 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 2680:2009 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.OQHLuft- und Raumfahrt - Annietmuttern, selbstsichernd, schwenkbar, beiderseitiger Flansch, aus legiertem Stahl, verkadmet, MoS2-geschmiert, metrische Reihe - Klasse: 900 MPa (bei Raumtemperatur) / 235 °CSérie aérospatiale - Écrous à river, à freinage interne, flottants, orientables, double patte, en acier allié, cadmiés, lubrifiés MoS2, série métrique - Classification: 900 MPa (à température ambiante) / 235 °CAerospace series - Nuts, anchor, self-locking, floating, self-aligning, two lug, in alloy steel, cadmium plated, MoS2 lubricated, metric series - Classification: 900 MPa (at ambient temperature) / 235 °C49.030.30MaticeNutsICS:Ta slovenski standard je istoveten z:EN 2680:2006SIST EN 2680:2009en,de01-junij-2009SIST EN 2680:2009SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 2680
May 2006 ICS 49.030.30 English Version
Aerospace series - Nuts, anchor, self-locking, floating, self-aligning, two lug, in alloy steel, cadmium plated, MoS2 lubricated - Classification: 900 MPa (at ambient temperature) / 235
°C
Série aérospatiale - Écrous à river, à freinage interne, flottants, orientables, double patte, en acier allié, cadmiés, lubrifiés MoS2, série métrique - Classification: 900 MPa (à température ambiante) / 235
°C
Luft- und Raumfahrt - Annietmuttern, selbstsichernd, schwenkbar, beiderseitiger Flansch, aus legiertem Stahl, verkadmet, MoS2-geschmiert - Klasse: 900 MPa (bei Raumtemperatur) / 235
°C This European Standard was approved by CEN on 3 February 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
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36
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 2680:2006: ESIST EN 2680:2009
...

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