Aerospace series - Nuts, hexagonal, plain, reduced height, normal across flats, in steel, cadmium plated, left hand thread - Classification: 900 MPa (at ambient temperature)/235 °C

This European Standard specifies the characteristics of plain, hexagonal nuts, reduced height, normal across flats, with left hand thread, in steel, cadmium plated.
Classification: 900 MPa / 235 °C.

Luft- und Raumfahrt - Flache Sechskantmuttern, mit normaler Schlüsselweite, aus Stahl, verkadmet, Linksgewinde - Klasse: 900 MPa (bei Raumtemperatur)/235 °C

Série aérospatiale - Écrous hexagonaux ordinaires, hauteur réduite, surplats normaux, en acier, cadmiés, filetage à gauche - Classification: 900 MPa (à température ambiante)/235 °C

Aeronavtika - Matice, šestrobe, drsne, z normalnim zevom ključa, iz jekla, kadmirane, levi navoj - Klasifikacija: 900 MPa (pri temperaturi okolice)/235 °C

Ta evropski standard opredeljuje značilnosti drsnih šestrobnih matic z normalnim zevom ključa, z levim navojem, iz jekla, kadmirane. Razvrstitev: 900 MPa/ 235°C.

General Information

Status
Published
Publication Date
18-Jan-2010
ICS
49.030.30 - Nuts
Technical Committee
I13 - Imaginarni 13
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
17-Dec-2009
Due Date
21-Feb-2010
Completion Date
19-Jan-2010
Ref Project
EN 3229:2009 - Aerospace series - Nuts, hexagonal, plain, reduced height, normal across flats, in steel, cadmium plated, left hand thread - Classification: 900 MPa (at ambient temperature) / 235 °C

Overview

SIST EN 3229:2010 is a European Standard developed by CEN that specifies the characteristics of aerospace-grade hexagonal nuts. These nuts are plain, reduced height, with normal flats, manufactured from steel and finished with cadmium plating. The standard particularly applies to nuts with left-hand threads, designed to withstand classification loads of 900 MPa at ambient temperature, and maintain their integrity up to 235 °C.

This standard ensures uniformity and reliability for critical aerospace fasteners used in environments requiring high strength and temperature resistance. SIST EN 3229:2010 is essential for aerospace manufacturers, suppliers, and maintenance organizations committed to meeting stringent quality and safety requirements.

Key Topics

  • Nut Specifications
    The document outlines critical specifications including:

    • Hexagonal, plain style with reduced height.
    • Normal across flats as per ISO 9609 dimensions.
    • Left-hand thread configuration for specialized aerospace applications.
    • Steel material as per aerospace-grade alloys like FE-PL1502 and FE-PL2102.

  • Material and Surface Treatment

    • Steel types referenced include 25CrMo4 and 35NiCr6 conforming to EN 2205, EN 2438, among others.
    • Cadmium plating with a minimum thickness of 5 µm applied on threads and contact surfaces to offer corrosion resistance.

  • Mechanical Classification

    • Strength rating fixed at 900 MPa tensile load under ambient conditions.
    • Performance assured up to 235 °C without permanent material alteration.

  • Dimensional and Tolerance Requirements

    • Dimensions and tolerances conform to ISO 9609 and ISO 8788.
    • Masses and mechanical properties provided for various nut sizes, ensuring interchangeability.

  • Marking and Designation

    • Markings comply with EN 2424 standards.
    • Nuts are identified by a combination of codes indicating size, thread type, and presence of lockwire holes.

  • Quality and Compliance

    • Manufacturing and approval to be conducted under quality management systems compatible with EN 9100.
    • Technical procurement guided by ISO 9139 standards.

Applications

SIST EN 3229:2010 hexagonal nuts are designed for demanding aerospace and defense applications where high mechanical strength combined with lightweight and corrosion resistance is critical. Typical use cases include:

  • Fastening critical components in aircraft assemblies where vibration and thermal exposure are factors.
  • Applications requiring left-hand threaded nuts for anti-rotational or safety purposes in aerospace structures.
  • Areas subject to moderate heat exposure (up to 235 °C) such as engine compartments and airframes.
  • Situations requiring corrosion resistance provided by cadmium plating to enhance lifecycle and reliability.
  • Compatible with precision aerospace bolts classified at 900 MPa strength.

The standardized dimensions and performance classification make these nuts suitable for aerospace OEMs, maintenance centers, and suppliers needing consistent, reliable fastener solutions.

Related Standards

  • EN 2133 – Cadmium plating specifications for steels with tensile strengths up to 1450 MPa.
  • EN 2205, EN 2438, EN 2444, EN 2448 – Aerospace steel standards for various steel grades suitable for nuts.
  • EN 2424 – Marking requirements for aerospace products ensuring traceability.
  • ISO 9609 – Dimensional and tolerance control of hexagonal nuts with aerospace MJ threads.
  • ISO 9139 – Procurement specification for aerospace nuts (plain or castellated).
  • EN 9100 – Quality management systems for aerospace organizations to ensure manufacturing and approval compliance.

Keywords: aerospace hexagonal nuts, SIST EN 3229:2010, reduced height nuts, cadmium plated nuts, left hand thread nuts, steel aerospace fasteners, 900 MPa nuts, temperature classification 235 °C, aerospace nut standards, aerospace fastener specifications, aerospace nut marking.

Frequently Asked Questions

SIST EN 3229:2010 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Nuts, hexagonal, plain, reduced height, normal across flats, in steel, cadmium plated, left hand thread - Classification: 900 MPa (at ambient temperature)/235 °C". This standard covers: This European Standard specifies the characteristics of plain, hexagonal nuts, reduced height, normal across flats, with left hand thread, in steel, cadmium plated. Classification: 900 MPa / 235 °C.

This European Standard specifies the characteristics of plain, hexagonal nuts, reduced height, normal across flats, with left hand thread, in steel, cadmium plated. Classification: 900 MPa / 235 °C.

SIST EN 3229:2010 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.

SIST EN 3229:2010 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)


SLOVENSKI STANDARD
01-februar-2010
$HURQDYWLND0DWLFHãHVWUREHGUVQH]QRUPDOQLP]HYRPNOMXþDL]MHNOD
NDGPLUDQHOHYLQDYRM.ODVLILNDFLMD03D SULWHPSHUDWXULRNROLFH ƒ&
Aerospace series - Nuts, hexagonal, plain, reduced height, normal across flats, in steel,
cadmium plated, left hand thread - Classification: 900 MPa (at ambient temperature)/235
°C
Luft- und Raumfahrt - Flache Sechskantmuttern, mit normaler Schlüsselweite, aus Stahl,
verkadmet, Linksgewinde - Klasse: 900 MPa (bei Raumtemperatur)/235 °C
Série aérospatiale - Écrous hexagonaux ordinaires, hauteur réduite, surplats normaux,
en acier, cadmiés, filetage à gauche - Classification: 900 MPa (à température
ambiante)/235 °C
Ta slovenski standard je istoveten z: EN 3229:2009
ICS:
49.030.30 Matice Nuts
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 3229
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2009
ICS 49.030.30
English Version
Aerospace series - Nuts, hexagonal, plain, reduced height,
normal across flats, in steel, cadmium plated, left hand thread -
Classification: 900 MPa (at ambient temperature) / 235 °C
Série aérospatiale - Écrous hexagonaux ordinaires, hauteur Luft- und Raumfahrt - Flache Sechskantmuttern, mit
réduite, surplats normaux, en acier, cadmiés, filetage à normaler Schlüsselweite, aus Stahl, verkadmet,
gauche - Classification : 900 MPa (à température Linksgewinde - Klasse: 900 MPa (bei Raumtemperatur) /
ambiante) / 235 °C 235 °C
This European Standard was approved by CEN on 29 September 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, 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 Ref. No. EN 3229:2009: E
worldwide for CEN national Members.

Contents Page
Foreword .3
1 Scope .4
2 Normative references .4
3 Required characteristics .5
4 Designation .7
5 Marking .8
6 Technical specification .8

Foreword
This document (EN 3229:2009) has been prepared by the Aerospace and Defence Industries Association of
Europe - Standardization (ASD-STAN).
After enquiries and votes carried out in accordance with the rules of this Association, this Standard has
received the approval of the National Associations and the Official Services of the member countries of ASD,
prior to its presentation to CEN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by June 2010, and conflicting national standards shall be withdrawn at the
latest by June 2010.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: 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 the United Kingdom.
1 Scope
This European Standard specifies the characteristics of plain, hexagonal nuts, reduced height, normal across
fla
...

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