EN 3435:2010
(Main)Aerospace series - Nuts, anchor, self-locking, floating, two lug, reduced series, with counterbore, in heat resisting steel, MoS2 lubricated - Classification: 1 100 MPa (at ambient temperature) / 315 °C
Aerospace series - Nuts, anchor, self-locking, floating, two lug, reduced series, with counterbore, in heat resisting steel, MoS2 lubricated - Classification: 1 100 MPa (at ambient temperature) / 315 °C
This standard specifies the characteristics of two lug, reduced series, counterbored floating anchor nuts, with a self-locking feature achieved by forming the upper portion out-of-round, in heat resisting steel, MoS2 lubricated.
Classification: 1 100 MPa/315 °C.
Luft- und Raumfahrt - Annietmuttern, selbstsichernd, beweglich, beiderseitiger verkürzter Flansch, mit zylindrischer Aussenkung, aus hochwarmfestem Stahl, MoS2-geschmiert - Klasse: 1 100 MPa (bei Raumtemperatur) / 315 °C
Diese Norm legt die Merkmale von beweglichen Annietmuttern mit zylindrischer Aussenkung und beiderseitigem verkürztem Flansch, selbstsichernd durch ovale Formgebung des oberen Teils, aus hochwarmfestem Stahl, MoS2-geschmiert, fest.
Klasse: 1100 MPa ) / 315 °C )
Série aérospatiale - Écrous à river, à freinage interne, flottants, double patte, série réduite, avec chambrage, en acier résistant à chaud, lubrifiés MoS2 - Classification: 1 100 MPa (à température ambiante) / 315 °C
Aeronavtika - Zakovne matice, samozapiralne, premične, dvostranske, skrajšana serija, z izvrtino za vijake, iz toplotnoodpornega jekla, mazane z MoS2 - Klasifikacija: 1100 MPa (pri temperaturi okolice)/315 °C
Ta standard določa značilnosti dvostranskih premične zakovne matice skrajšane serije z izvrtino za vijake in s samozapiralno funkcijo, ki je dosežena tako, da je zgornji del oblikovan rahlo ovalno, iz toplotnoodpornega jekla in mazane z MoS2. Klasifikacija: 1.100 MPa/ 315 °C.
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 3435:2010 is a European aerospace standard developed by CEN that defines the specifications for two lug, reduced series, counterbored floating anchor nuts used in high-temperature applications. These nuts are self-locking through an out-of-round upper portion and made from heat-resisting steel, lubricated with molybdenum disulphide (MoS2) to ensure optimal performance under thermal stress.
Key features include:
- Self-locking floating anchor nuts with two lugs
- Reduced series design with counterbored structure
- Constructed from heat resisting steel rated for 1,100 MPa tensile strength at ambient temperature
- Rated for continuous use up to 315 °C without performance degradation
- MoS2 lubrication for enhanced friction control and durability
This standard is critical for aerospace and defense industries where components must reliably withstand extreme mechanical and thermal stresses while maintaining fastening security.
Key Topics
Design and Dimensions: The nuts conform to the dimensional and tolerance requirements outlined in ISO 7332 and ISO 8788, ensuring compatibility with aerospace fasteners. Tolerances are strictly controlled to maintain the floating feature and self-locking characteristic.
Material Requirements: Materials specified include heat resisting steels as per EN 2398, EN 2399, and related aerospace steel grades, providing strength and thermal resistance. The cage and threaded elements must meet precise EN steel standards.
Surface Treatment: A MoS2 dry lubricant coating per EN 2491 is applied to reduce friction and wear, crucial for high-temperature environments up to 315 °C.
Self-Locking Mechanism: The upper nut portion is intentionally out-of-round to enable a self-locking effect, preventing loosening due to vibration or thermal expansion.
Testing and Quality Control: Manufacturing quality must comply with EN 9100 and EN 9133 aerospace quality management standards, ensuring repeatability and safety of the fastening components.
Applications
EN 3435:2010 floating anchor nuts are essential in:
- Aerospace structures requiring high-strength, temperature-resistant fastenings
- Aircraft engine assemblies subjected to elevated temperatures
- Spacecraft components where thermal cycling and vibration resistance are critical
- Defense equipment demanding secure, reusable fastening solutions with self-locking features
Their specific heat resistance and MoS2 lubrication make these nuts reliable for critical applications involving exposure to temperatures up to 315 °C without compromising mechanical integrity.
Related Standards
- ISO 7332: Defines basic dimensions for anchor nuts similar to those in EN 3435.
- ISO 5855-2: Specifies limit dimensions for aerospace bolts and nuts.
- EN 2398 & EN 2399: Define the aerospace-grade heat resisting steel grades used.
- EN 2491: Outlines the coating methods for molybdenum disulphide dry lubricants.
- EN 9100: Covers quality management systems in aviation, space, and defense industries.
- EN 9133: Details qualification procedures for aerospace standard parts.
- ISO 8788: Sets tolerances for form and position for nuts.
By adhering to EN 3435:2010 and associated standards, manufacturers and engineers ensure the use of high-performance, reliable, and compatible floating anchor nuts optimized for extreme aerospace environments.
Keywords: aerospace anchor nuts, self-locking floating nuts, heat resisting steel nuts, MoS2 lubricated nuts, aerospace fastening standard, EN 3435:2010, high-temperature aerospace fasteners, two lug anchor nuts, aerospace nut classification, aerospace defense fasteners
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Frequently Asked Questions
EN 3435:2010 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 counterbore, in heat resisting steel, MoS2 lubricated - Classification: 1 100 MPa (at ambient temperature) / 315 °C". This standard covers: This standard specifies the characteristics of two lug, reduced series, counterbored floating anchor nuts, with a self-locking feature achieved by forming the upper portion out-of-round, in heat resisting steel, MoS2 lubricated. Classification: 1 100 MPa/315 °C.
This standard specifies the characteristics of two lug, reduced series, counterbored floating anchor nuts, with a self-locking feature achieved by forming the upper portion out-of-round, in heat resisting steel, MoS2 lubricated. Classification: 1 100 MPa/315 °C.
EN 3435:2010 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 3435:2010 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 3435:2010 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 zylindrischer Aussenkung, aus hochwarmfestem Stahl, MoS2-geschmiert - Klasse: 1100 MPa (bei Raumtemperatur)/315 °CSérie aérospatiale - Écrous à river, à freinage interne, flottants, double patte, série réduite, avec chambrage, en acier résistant à chaud, lubrifiés MoS2 - Classification: 1 100 MPa (à température ambiante)/315 °CAerospace series - Nuts, anchor, self-locking, floating, two lug, reduced series, with counterbore, in heat resisting steel, MoS2 lubricated - Classification: 1100 MPa (at ambient temperature)/315 °C49.030.30MaticeNutsICS:Ta slovenski standard je istoveten z:EN 3435:2010SIST EN 3435:2010en,de01-marec-2010SIST EN 3435:2010SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 3435
January 2010 ICS 49.030.30 English Version
Aerospace series - Nuts, anchor, self-locking, floating, two lug, reduced series, with counterbore, in heat resisting steel, MoS2 lubricated - Classification: 1 100 MPa (at ambient temperature) / 315 °C
Série aérospatiale - Écrous à river, à freinage interne, flottants, double patte, série réduite, avec chambrage, en acier résistant à chaud, lubrifiés MoS2 - Classification: 1 100 MPa (à température ambiante) / 315 °C
Luft- und Raumfahrt - Annietmuttern, selbstsichernd, beweglich, beiderseitiger verkürzter Flansch, mit zylindrischer Aussenkung, aus hochwarmfestem Stahl, MoS2-geschmiert - Klasse: 1 100 MPa (bei Raumtemperatur) / 315 °C This European Standard was approved by CEN on 11 December 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 3435:2010: ESIST EN 3435:2010
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