EN 3226:2009
(Main)Nuts, hexagon, plain, normal height, normal across flats, steel, cadmium plated - Classification 1 100 MPa/235 °C
Nuts, hexagon, plain, normal height, normal across flats, steel, cadmium plated - Classification 1 100 MPa/235 °C
This standard specifies the characteristics of plain, hexagonal nuts, normal height, normal across flats, in steel,
cadmium plated.
Classification: 1 100 MPa 1 / 235 °C 2
Luft- und Raumfahrt - Sechskantmuttern mit normaler Schlüsselweite, aus Stahl, verkadmet; Klasse: 1 100 MPa/235 °C
Diese Norm legt die Eigenschaften von Sechskantmuttern mit normaler Schlüsselweite, aus Stahl, verkadmet, fest.
Klasse: 1 000 MPa ) / 235 °C )
Ecrous hexagonaux, ordinaires, hauteur normale, à surplat normal, en acier, cadmiés - Classification 1 100 MPA/235 °C
Matice, šestrobe, z normalnim zevom ključa, jeklene, kadmirane - Klasifikacija 1100 MPa/235 °C
General Information
- Status
- Published
- Publication Date
- 11-Aug-2009
- Withdrawal Date
- 27-Feb-2010
- 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
- 11-Feb-2026
Relations
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
Overview
EN 3226:2009 is a CEN European standard that defines requirements for plain hexagon nuts (normal height, normal across flats) made of steel, cadmium plated, intended primarily for aerospace and defence applications. The standard covers nuts with MJ threads and a strength/temperature classification of 1100 MPa / 235 °C. It specifies configuration, dimensions, materials, surface treatment, marking and procurement-related technical requirements.
Key Topics
- Scope and classification
- Applies to plain hexagon nuts in steel, cadmium plated; classification 1100 MPa / 235 °C (ability to sustain 100% load at ambient temperature; max temperature per surface treatment).
- Dimensions and thread form
- Geometry and tolerances referenced to ISO 8279 (dimensions for MJ-thread hexagon nuts). Diameter codes and dimensional tables are provided (see Table 1 of the standard).
- Materials
- Acceptable steels referenced: EN 2205, EN 2438, EN 2448, EN 3513 or TR 3823 - high-strength aerospace steels in the 900–1 100 MPa range.
- Surface treatment
- Cadmium plating requirements according to EN 2133: minimum plating thickness specified (5 µm on threads/contact surfaces) and continuous cadmium on other surfaces; surface finish and edge break guidance included.
- Marking, designation and traceability
- Marking aligned with EN 2424; example designation format (e.g., EN3226H060) and options (lockwire holes) are specified.
- Quality and procurement
- Technical procurement/specification references include ISO 9139 and quality-system expectations per EN 9100.
Applications
- Aerospace and defence fastenings where high-strength, cadmium-plated hexagon nuts are required.
- Structural assemblies, engine components and airframe hardware exposed to corrosive environments where cadmium plating is used and operating temperatures do not exceed the plating’s rated limit (235 °C).
- Manufacturers producing MJ-thread nuts, procurement/specification writers, design engineers and maintenance organizations specifying or replacing fasteners in aerospace systems.
Who should use this standard
- Fastener manufacturers and heat-treatment shops producing aerospace nuts
- Aerospace design and structural engineers specifying fasteners
- Purchasing, quality assurance and regulatory teams in aerospace and defence supply chains
- Maintenance, repair and overhaul (MRO) organizations
Related Standards
- EN 2133 (Cadmium plating), EN 2205, EN 2438, EN 2448, EN 3513 (steels)
- EN 2424 (marking), EN 9100 (quality)
- ISO 8279 (dimensions for MJ-thread hexagon nuts), ISO 5855-2 (MJ thread limits), ISO 8788 (tolerances), ISO 9139 (procurement)
Keywords: EN 3226:2009, hexagon nuts, cadmium plated, aerospace nuts, MJ threads, 1100 MPa/235 °C, steel nuts.
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Frequently Asked Questions
EN 3226:2009 is a standard published by the European Committee for Standardization (CEN). Its full title is "Nuts, hexagon, plain, normal height, normal across flats, steel, cadmium plated - Classification 1 100 MPa/235 °C". This standard covers: This standard specifies the characteristics of plain, hexagonal nuts, normal height, normal across flats, in steel, cadmium plated. Classification: 1 100 MPa 1 / 235 °C 2
This standard specifies the characteristics of plain, hexagonal nuts, normal height, normal across flats, in steel, cadmium plated. Classification: 1 100 MPa 1 / 235 °C 2
EN 3226:2009 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 3226:2009 has the following relationships with other standards: It is inter standard links to EN 2133:2020, EN 2205:2009, EN ISO 13786:2017, EN 2944:1998, EN 9100:2018, EN 840-6:2004+A1:2008, EN 2448:2008, EN 2424:2008, EN 2438:2008. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 3226:2009 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.ODVLILNDFLMDSechskantmuttern mit normaler Schlüsselweite, aus Stahl, verkadmet; Klasse: 1100 MPa/235 °CEcrous hexagonaux, ordinaires, hauteur normale, à surplat normal, en acier, cadmiés - Classification 1100 MPA/235 degrés CNuts, hexagon, plain, normal height, normal across flats, steel, cadmium plated - Classification 1100 MPa/235 degrees C49.030.30MaticeNutsICS:Ta slovenski standard je istoveten z:EN 3226:2009SIST EN 3226:2009en,de01-oktober-2009SIST EN 3226:2009SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 3226
August 2009 ICS 49.030.30 English Version
Nuts, hexagon, plain, normal height, normal across flats, steel, cadmium plated - Classification 1 100 MPa/235 °C
Ecrous hexagonaux, ordinaires, hauteur normale, à surplat normal, en acier, cadmiés - Classification 1 100 MPA/235
°C
Luft- und Raumfahrt - Sechskantmuttern mit normaler Schlüsselweite, aus Stahl, verkadmet; Klasse: 1 100 MPa/235 °C This European Standard was approved by CEN on 27 June 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 worldwide for CEN national Members. Ref. No. EN 3226:2009: ESIST EN 3226:2009
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