Aerospace series - Nuts, hexagonal, plain, normal height, normal across flats, in steel, cadmium plated, left hand thread - Classification: 1100 MPa (at ambient temperature)/235 °C

This standard specifies the characteristics of plain, hexagonal nuts, normal height, normal across flats, with left hand thread, in steel, cadmium plated.
Classification : 1 100 MPa / 235 °C.

Luft- und Raumfahrt - Sechskantmuttern mit normaler Schlüsselweite, aus Stahl, verkadmet, Linksgewinde - Klasse: 1100 MPa (bei Raumtemperatur)/235 °C

Diese Norm legt die Eigenschaften von einfachen Sechskantmuttern, normale Höhe, normale Schlüsselweite, Linksgewinde, aus Stahl, verkadmet, fest.
Klasse: 1 100 MPa  ) / 235 °C  )

Série aérospatiale - Écrous hexagonaux ordinaires, hauteur normale, surplats normaux, en acier, cadmiés, filetage à gauche - Classification: 1100 MPa (à température ambiante)/235 °C

Aeronavtika - Matice, šestrobe, drsne, z normalnim zevom ključa, iz jekla, kadmirane, levi navoj - Klasifikacija: 1100 MPa (pri temperaturi okolice)/235 °C

Ta standard opredeljuje značilnosti drsnih šestrobih matic normalne višine, z normalnim zevom ključa, z levim navojem, iz jekla, kadmirane. Klasifikacija: 1.100 MPa (pri temperaturi okolice)/235 °C.

General Information

Status
Published
Publication Date
07-Mar-2010
ICS
49.030.30 - Nuts
Technical Committee
I13 - Imaginarni 13
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Mar-2010
Due Date
06-May-2010
Completion Date
08-Mar-2010
Ref Project
EN 3227:2010 - Aerospace series - Nuts, hexagonal, plain, normal height, normal across flats, in steel, cadmium plated, left hand thread - Classification: 1 100 MPa (at ambient temperature) / 235 °C

Overview

EN 3227:2010 is a CEN aerospace standard that specifies the required characteristics for plain, hexagonal nuts of normal height and normal across-flats in steel, with cadmium plating and left-hand MJ threads. The standard is classified for service with an associated bolt strength of 1100 MPa (at ambient temperature) and a maximum exposure temperature of 235 °C, with dimensions and tolerances referenced to international aerospace thread and form standards.

Key Topics

  • Scope and classification: Nuts are intended for aerospace use; classification is 1100 MPa / 235 °C, indicating the nut's ability to withstand the full load of the matched bolt at ambient temperature and the maximum temperature it can withstand without permanent alteration.
  • Materials: Permitted steels include those referenced in the standard (EN 2205, EN 2438, EN 2448, EN 3513) and additional material guidance in TR 3823.
  • Surface treatment: Cadmium plating per EN 2133 is mandatory, with a minimum of 5 µm on threads and all surfaces contactable by a 20 mm diameter ball; a continuous cadmium layer is required on other surfaces.
  • Threads and dimensions: Thread forms and limit dimensions follow ISO 5855-2 (MJ threads) and ISO 8279 for nut dimensions. Tolerances of form and position conform to ISO 8788.
  • Marking and designation: Marking rules reference EN 2424; designation examples and options (e.g., lockwire holes) are provided in the standard's tables.

Applications

EN 3227:2010 nuts are used where consistent mechanical performance, interchangeability and corrosion protection are required in aerospace assemblies. Typical practical values:

  • Fastener procurement for aircraft structures and systems where left-hand threads are required.
  • Repair and MRO inventories specifying traceable, standardized nuts to match high-strength bolts (1100 MPa class).
  • Environments requiring cadmium plating for corrosion resistance up to the specified temperature.

Benefits for specifiers and engineers:

  • Ensures interchangeability between manufacturers through standardized dimensions and markings.
  • Provides clear material, surface treatment and approval references for procurement and quality control.
  • Aligns supplier approval with aerospace quality management (EN 9100).

Related Standards

  • EN 2133 - Cadmium plating of steels for aerospace
  • ISO 5855-2 - MJ threads limit dimensions for bolts and nuts
  • ISO 8279 - Dimensions for hexagonal nuts with MJ threads
  • ISO 8788 - Tolerances of form and position for nuts
  • EN 2424 - Marking of aerospace products
  • EN 9100 - Quality Management Systems for aviation, space and defence

For specification writers and purchasing teams, EN 3227:2010 provides the authoritative reference to ensure nuts meet the mechanical classification, material and surface treatment expectations required in aerospace applications.

Frequently Asked Questions

SIST EN 3227:2010 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Nuts, hexagonal, plain, normal height, normal across flats, in steel, cadmium plated, left hand thread - Classification: 1100 MPa (at ambient temperature)/235 °C". This standard covers: This standard specifies the characteristics of plain, hexagonal nuts, normal height, normal across flats, with left hand thread, in steel, cadmium plated. Classification : 1 100 MPa / 235 °C.

This standard specifies the characteristics of plain, hexagonal nuts, normal height, normal across flats, with left hand thread, in steel, cadmium plated. Classification : 1 100 MPa / 235 °C.

SIST EN 3227:2010 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 3227:2010 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 - Sechskantmuttern mit normaler Schlüsselweite, aus Stahl, verkadmet, Linksgewinde - Klasse: 1100 MPa (bei Raumtemperatur)/235 °CSérie aérospatiale - Écrous hexagonaux ordinaires, hauteur normale, surplats normaux, en acier, cadmiés, filetage à gauche - Classification: 1100 MPa (à température ambiante)/235 °CAerospace series - Nuts, hexagonal, plain, normal height, normal across flats, in steel, cadmium plated, left hand thread - Classification: 1100 MPa (at ambient temperature)/235 °C49.030.30MaticeNutsICS:Ta slovenski standard je istoveten z:EN 3227:2010SIST EN 3227:2010en,de01-april-2010SIST EN 3227:2010SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 3227
February 2010 ICS 49.030.30 English Version
Aerospace series - Nuts, hexagonal, plain, normal height, normal across flats, in steel, cadmium plated, left hand thread - Classification: 1 100 MPa (at ambient temperature) / 235 °C
Série aérospatiale - Écrous hexagonaux ordinaires, hauteur normale, surplats normaux, en acier, cadmiés, filetage à gauche - Classification : 1 100 MPa (à température ambiante) / 235 °C
Luft- und Raumfahrt - Sechskantmuttern mit normaler Schlüsselweite, aus Stahl, verkadmet, Linksgewinde - Klasse: 1 100 MPa (bei Raumtemperatur) / 235 °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 3227:2010: ESIST EN 3227:2010
...

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