EN 4126:2010
(Main)Aerospace series - Nuts, anchor, self-locking, floating, two lug, reduced series, with incremental counterbore, in heat resisting steel, MoS2 lubricated - Classification: 900 MPa (at ambient temperature) / 315 °C
Aerospace series - Nuts, anchor, self-locking, floating, two lug, reduced series, with incremental counterbore, in heat resisting steel, MoS2 lubricated - Classification: 900 MPa (at ambient temperature) / 315 °C
This standard specifies the characteristics of miniature self-locking two lug, reduced series, incremental counterbored floating anchor nuts, in heat resisting steel, MoS2 lubricated.
Classification: 900 MPa / 315 °C.
Luft- und Raumfahrt - Annietmuttern, selbstsichernd, beweglich, beiderseitiger verkürzter Flansch, mit tiefer zylindrischer Aussenkung, aus hochwarmfestem Stahl, MoS2-geschmiert - Klasse: 900 MPa (bei Raumtemperatur) / 315 °C
Diese Norm legt die Eigenschaften von selbstsichernden, beweglichen Annietmuttern mit beiderseitigem,
verkürztem Flansch und tiefer zylindrischer Aussenkung, aus hochwarmfestem Stahl, MoS2-geschmiert, fest.
Klasse: 900 MPa1)/315 °C2)
Série aérospatiale - Écrous à river, à freinage interne, flottants, double patte, série reduite, avec chambrage très profond, en acier résistant à chaud, lubrifiés MoS2 - Classification : 900 MPa (à température ambiante) / 315 °C
Aeronavtika - Zakovne matice, samovarovalne, premične, dvostranske, skrajšana serija, z izvrtino za valjaste vijake, iz toplotnoodpornega jekla, mazane z MoS2 - Klasifikacija: 900 MPa (pri temperaturi okolice)/315 °C
Ta standard določa značilnosti miniaturnih samovarovalnih, dvostranskih, zakovnih matic skrajšane serije z izvrtino za valjaste vijake iz toplotnoodpornega jekla, mazanih z MoS2. Klasifikacija: 900 Mpa1) / 315 °C2.
General Information
- Status
- Published
- Publication Date
- 26-Jan-2010
- Withdrawal Date
- 30-Jul-2010
- Technical Committee
- ASD-STAN - Aerospace
- Drafting Committee
- ASD-STAN/D 3 - Mechanical
- Current Stage
- 6060 - Definitive text made available (DAV) - Publishing
- Start Date
- 27-Jan-2010
- Completion Date
- 27-Jan-2010
Relations
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
Overview
EN 4126:2010 is a European aerospace standard published by CEN that defines the characteristics of miniature self‑locking, floating two‑lug anchor nuts in a reduced series. These nuts are made from heat‑resisting steel, are MoS2 (molybdenum disulphide) lubricated, and are classified 900 MPa / 315 °C. The standard covers configuration, materials, tolerances, surface treatment and marking required for use in aerospace applications that demand high strength and elevated‑temperature performance.
Key topics and requirements
- Scope and classification
- Covers miniature, two‑lug, floating anchor nuts with incremental counterbore.
- Classification: minimum tensile capability 900 MPa (at ambient temperature) and maximum service exposure 315 °C (conditioned by surface treatment).
- Configuration, dimensions and mass
- Dimensional definitions and tolerance zones are given (referenced figures and tables). Dimensions are expressed in millimetres and apply before MoS2 lubrication.
- Example designation format: EN4126-06008.
- Materials
- Threaded elements and cages are specified from aerospace heat‑resisting steels per EN 2398, EN 2399, EN 3638, EN 3639 or TR 3791.
- Surface treatment and lubrication
- MoS2 dry lubricant coatings per EN 2491 are required; coating thickness is not specifically prescribed by EN 4126.
- Geometrical tolerances and threads
- Tolerances of form and position per ISO 8788. Thread limits in accordance with ISO 5855‑2.
- Marking and identification
- Marking follows EN 2424 (style N); manufacturer/origin codes may be included.
- Quality and procurement
- Procurement technical specification reference: ISO 5858, with manufacturer approval to EN 9100 and product qualification per EN 9133.
Applications and users
- Typical users:
- Aerospace fastener manufacturers and designers
- Aircraft structural and engine component engineers
- Procurement, quality assurance and certification teams in aviation, space and defence sectors
- Practical use:
- Specifying and procuring high‑strength, heat‑resistant self‑locking anchor nuts for assemblies exposed to elevated temperatures (up to the classification limit) where secure locking and floating capability are required.
- Ensuring consistent manufacturing, inspection and marking of miniature two‑lug nuts for aerospace standardization and interchangeability.
Related standards
- EN 2398, EN 2399, EN 3638, EN 3639 (heat‑resisting steels)
- EN 2491 (MoS2 dry lubricants)
- ISO 5855‑2 (MJ threads)
- ISO 5858 (self‑locking nuts procurement)
- ISO 8788 (tolerances of form and position)
- EN 9100, EN 9133 (quality and qualification)
Keywords: EN 4126:2010, aerospace nuts, self‑locking anchor nuts, MoS2 lubricated, heat resisting steel, 900 MPa, 315 °C, floating two‑lug nuts, incremental counterbore.
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Frequently Asked Questions
EN 4126:2010 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Nuts, anchor, self-locking, floating, two lug, reduced series, with incremental counterbore, in heat resisting steel, MoS2 lubricated - Classification: 900 MPa (at ambient temperature) / 315 °C". This standard covers: This standard specifies the characteristics of miniature self-locking two lug, reduced series, incremental counterbored floating anchor nuts, in heat resisting steel, MoS2 lubricated. Classification: 900 MPa / 315 °C.
This standard specifies the characteristics of miniature self-locking two lug, reduced series, incremental counterbored floating anchor nuts, in heat resisting steel, MoS2 lubricated. Classification: 900 MPa / 315 °C.
EN 4126:2010 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 4126:2010 has the following relationships with other standards: It is inter standard links to EN 3638:2025, EN 9133:2018, EN 3816:2006, EN 2491:2011. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 4126:2010 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, beweglich, beiderseitiger verkürzter Flansch, mit tiefer zylindrischer Aussenkung, aus hochwarmfestem Stahl, MoS2-geschmiert - Klasse: 900 MPa (bei Raumtemperatur)/315 °CSérie aérospatiale - Écrous à river, à freinage interne, flottants, double patte, série reduite, avec chambrage très profond, en acier résistant à chaud, lubrifiés MoS2 - Classification: 900 MPa (à température ambiante)/315 °CAerospace series - Nuts, anchor, self-locking, floating, two lug, reduced series, with incremental counterbore, in heat resisting steel, MoS2 lubricated - Classification: 900 MPa (at ambient temperature)/315 °C49.030.30MaticeNutsICS:Ta slovenski standard je istoveten z:EN 4126:2010SIST EN 4126:2010en,de01-marec-2010SIST EN 4126:2010SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 4126
January 2010 ICS 49.030.30 English Version
Aerospace series - Nuts, anchor, self-locking, floating, two lug, reduced series, with incremental counterbore, in heat resisting steel, MoS2 lubricated - Classification: 900 MPa (at ambient temperature) / 315 °C
Série aérospatiale - Écrous à river, à freinage interne, flottants, double patte, série reduite, avec chambrage très profond, en acier résistant à chaud, lubrifiés MoS2 - Classification : 900 MPa (à température ambiante) / 315 °C Luft- und Raumfahrt - Annietmuttern, selbstsichernd, beweglich, beiderseitiger verkürzter Flansch, mit tiefer zylindrischer Aussenkung, aus hochwarmfestem Stahl, MoS2-geschmiert - Klasse: 900 MPa (bei Raumtemperatur) / 315 °C This European Standard was approved by CEN on 21 November 2009.
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 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 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, 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:
Avenue Marnix 17,
B-1000 Brussels © 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4126:2010: ESIST EN 4126:2010
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