EN 3034:2009
(Main)Aerospace series - Nuts, self-locking, hexagonal with captive washer - In heat resisting steel FE-PA92HT (A286), silver coated Classification: 1100 MPa/425 °C
Aerospace series - Nuts, self-locking, hexagonal with captive washer - In heat resisting steel FE-PA92HT (A286), silver coated Classification: 1100 MPa/425 °C
This standard specifies the dimensions of self-locking, silver coated hexagonal nuts with captive washer and MJ-thread in heat resisting steel FE-PA 92 HT (A286) for aerospace applications.
Maximum test temperature of the parts is 425 °C.
Luft- und Raumfahrt - Sechskantmuttern, selbstsichernd mit Bördelscheibe - Aus hochwarmfestem Stahl FE-PA92HT (A286), versilbert Klasse: 1100 MPa/425 °C
Série aérospatiale - Écrou hexagonaux avec rondelle captive auto-freinant, en acier résistant à chaud FE-PA92HT (A286), argenté - Classification : 1 100 MPa/425 °C
Aeronavtika - Matice, samozapiralne, šestrobe, z robljeno podložko, iz toplotnoodpornega jekla FE-PA92HT (A286), posrebrene - Klasifikacija: 1100 MPa/425 °C
General Information
- Status
- Published
- Publication Date
- 10-Feb-2009
- Withdrawal Date
- 30-Aug-2009
- Technical Committee
- ASD-STAN - Aerospace
- Drafting Committee
- ASD-STAN/D 3 - Mechanical
- Current Stage
- 9093 - Decision to confirm - Review Enquiry
- Start Date
- 21-Jan-2025
- Completion Date
- 21-Jan-2026
Relations
- Effective Date
- 28-Jan-2026
- Effective Date
- 08-Oct-2011
Overview
EN 3034:2009 - Aerospace series: Nuts, self-locking, hexagonal with captive washer - specifies the dimensions, materials and surface treatment for silver‑coated, self‑locking hexagonal nuts with a captive washer and MJ‑thread made from heat‑resisting steel FE‑PA92HT (A286). The parts are classified 1100 MPa / 425 °C and are intended for aerospace applications where a maximum test temperature of 425 °C is required. The standard defines configuration, tolerances, marking and designation to ensure interchangeability and traceability of high‑temperature fasteners.
Key topics and requirements
- Scope & configuration
- Self‑locking hexagonal nuts with a captive washer; MJ‑thread form per ISO 5855.
- Dimensions, tolerances and masses are given for sizes MJ3 to MJ12 (see table in the standard); dimensions apply after coating.
- Material
- Nut: heat‑resisting steel FE‑PA92HT (A286) per EN 2399 / EN 3638 / EN 3639.
- Washer: FE‑PA92HT or steel FE‑PA15.
- Mechanical classification
- 1100 MPa (strength classification) applicable up to 425 °C test temperature.
- Surface treatment
- Silver plating to EN 2786 with 5 µm to 15 µm thickness.
- For nuts MJ6 and larger, coating thickness measured at pitch diameter must be ≥ 5 µm.
- Nuts MJ5 and smaller require complete thread coverage.
- Washers: passivated per EN 2516.
- Functional features
- Self‑locking is achieved by a controlled out‑of‑round form in the locking zone (manufacturer determines specific form within tolerances).
- Washer must be free to rotate on the nut; bearing surface flat to concave (not convex).
- Marking & designation
- Marking per EN 2424 (class F) and designation format defined (e.g., NUT EN 3034 - 050).
Applications and users
- Typical applications: high‑temperature aerospace assemblies such as engine hot‑sections, exhaust systems, and other systems requiring heat‑resistant, vibration‑resistant fasteners.
- Primary users:
- Aerospace OEMs and tier‑1 suppliers specifying fasteners for assemblies.
- Fastener manufacturers and plating shops producing silver‑coated A286 nuts.
- Design and structural engineers, procurement, quality assurance and MRO teams ensuring compliance, interchangeability and traceability.
Related standards
- EN 2399, EN 3638, EN 3639 - material specifications for FE‑PA92HT (A286)
- EN 2786 - electrolytic silver plating of fasteners
- EN 2516 - passivation of corrosion resistant steels
- EN 2424 - marking of aerospace products
- ISO 5855‑1 / ISO 5855‑2 - MJ thread general requirements and limits
- EN 3512 - technical specification for corresponding hexagonal nuts
Keywords: EN 3034:2009, aerospace nuts, self‑locking hexagonal nut, FE‑PA92HT, A286, silver coated fasteners, MJ thread, 425 °C, heat resisting steel.
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Frequently Asked Questions
EN 3034:2009 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Nuts, self-locking, hexagonal with captive washer - In heat resisting steel FE-PA92HT (A286), silver coated Classification: 1100 MPa/425 °C". This standard covers: This standard specifies the dimensions of self-locking, silver coated hexagonal nuts with captive washer and MJ-thread in heat resisting steel FE-PA 92 HT (A286) for aerospace applications. Maximum test temperature of the parts is 425 °C.
This standard specifies the dimensions of self-locking, silver coated hexagonal nuts with captive washer and MJ-thread in heat resisting steel FE-PA 92 HT (A286) for aerospace applications. Maximum test temperature of the parts is 425 °C.
EN 3034:2009 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.
EN 3034:2009 has the following relationships with other standards: It is inter standard links to EN 3638:2025, EN 3034:2009/AC:2011. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 3034:2009 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.Aeronavtika - Matice, samozapiralne, šestrobe, z robljeno podložko, iz toplotnoodpornega jekla FE-PA92HT (A286), posrebrene - Klasifikacija: 1100 MPa/425 °CLuft- und Raumfahrt - Sechskantmuttern, selbstsichernd mit Bördelscheibe - Aus hochwarmfestem Stahl FE-PA92HT (A286), versilbert - Klasse: 1100 MPa/425 °CSérie aérospatiale - Écrou hexagonaux avec rondelle captive auto-freinant, en acier résistant à chaud FE-PA92HT (A286), argenté - Classification : 1 100 MPa/425 °CAerospace series - Nuts, self-locking, hexagonal with captive washer - In heat resisting steel FE-PA92HT (A286), silver coated - Classification: 1100 MPa/425 °C49.030.30MaticeNutsICS:Ta slovenski standard je istoveten z:EN 3034:2009SIST EN 3034:2009en,de01-maj-2009SIST EN 3034:2009SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 3034
February 2009 ICS 49.030.30 English Version
Aerospace series - Nuts, self-locking, hexagonal with captive washer - In heat resisting steel FE-PA92HT (A286), silver coated - Classification: 1 100 MPa/425 °C
Série aérospatiale - Écrou hexagonaux avec rondelle captive auto-freinant, en acier résistant à chaud FE-PA92HT (A286), argenté - Classification: 1 100 MPa/425 °C
Luft- und Raumfahrt - Sechskantmuttern, selbstsichernd mit Bördelscheibe - Aus hochwarmfestem Stahl FE-PA92HT (A286), versilbert - Klasse: 1 100 MPa/425 °C This European Standard was approved by CEN on 2 August 2008.
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, 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 © 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 3034:2009: ESIST EN 3034:2009
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