Aerospace series - Nuts, hexagon, slotted / castellated, reduced height, normal across flats, in heat resisting steel, silver plated - Classification: 900 MPa (at ambient temperature) / 650 °C

This standard specifies the characteristics of hexagonal slotted / castellated nuts, reduced height, normal across flats, in heat resisting steel, silver plated.
Classification: 900 MPa  ) / 650 °C  )

Luft- und Raumfahrt - Flache Kronenmuttern mit normaler Schlüsselweite, aus hochwarmfestem Stahl, versilbert - Klasse: 900 MPa (bei Raumtemperatur) / 650 °C

Diese Norm legt die Eigenschaften von flachen Kronenmuttern mit normaler Schlüsselweite, aus hochwarmfestem Stahl, versilbert, fest.
Klasse: 900 MPa  ) / 650 °C  )

Série aérospatiale - Écrous hexagonaux a créneaux, hauteur réduite, surplats normaux, en acier résistant a chaud, argentés - Classification : 900 MPa (a température ambiante) / 650 °C

La présente norme spécifie les caractéristiques des écrous hexagonaux à créneaux, hauteur réduite, surplats normaux, en acier résistant à chaud, argentés.
Classification : 900 MPa  ) / 650 °C  )

Aerospace series - Nuts, hexagon, slotted / castellated, reduced height, normal across flats, in heat resisting steel, silver plated - Classification: 900 Mpa (at ambient temperature) / 650 oC

General Information

Status
Published
Publication Date
31-Dec-2001
ICS
49.030.30 - Nuts
Technical Committee
SS SPL - Technical Board for the general field
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Jan-2002
Due Date
01-Jan-2002
Completion Date
01-Jan-2002
Ref Project
EN 2809:2001 - Aerospace series - Nuts, hexagon, slotted / castellated, reduced height, normal across flats, in heat resisting steel, silver plated - Classification: 900 MPa (at ambient temperature) / 650 °C

Overview

EN 2809:2001 defines the characteristics of aerospace hexagonal slotted (castellated) nuts, reduced height, normal across flats, manufactured in heat-resisting steel and silver plated. The standard applies to nuts classified at 900 MPa (ambient) with a maximum service temperature of 650 °C. Dimensions and general configuration follow the aerospace series conventions and are given in millimetres after surface treatment.

Key Topics

  • Scope and classification: Nuts are specified for aerospace applications with a classification of 900 MPa / 650 °C.
  • Configuration and dimensions: Dimensions and tolerances are in conformity with ISO 9618 and ISO 5855-2 for MJ threads; details of form not stated are at the manufacturer's option.
  • Tolerances of form and position: Referenced to ISO 8788 for metric tolerances of form and position.
  • Materials: Guidance and selection criteria are referenced in TR 3823 (materials for plain and slotted hexagonal nuts).
  • Surface treatment: Electrolytic silver plating per EN 2786. Specified thickness:
    • External surfaces: 5 µm to 15 µm
    • Thread flanks: minimum 5 µm for nuts MJ6 and larger; nuts MJ5 and smaller shall have complete coverage over the full thread profile.
  • Quality and procurement: Manufacturer approval and quality-system provisions reference EN 2000 and the procurement specification ISO 9139.

Applications

EN 2809 nuts are intended for aerospace fastener applications where elevated temperature resistance and high tensile classification are required. Typical practical values and uses include:

  • Use on high-temperature assemblies where nuts must retain mechanical integrity up to 650 °C after exposure and cooldown.
  • Where silver plating is required for corrosion resistance, conductivity or assembly compatibility.
  • Compatible with MJ-series threads per ISO 5855-2; suitable for reduced-height fastening where castellated locking (split pin retention) is used.

Designation example: NUT EN2809-080 (number of standard + diameter code). Split pin guidance refers to EN 2367 and marking to EN 2424.

Related Standards

  • ISO 5855-2 - MJ threads, limit dimensions
  • ISO 8788 - Tolerances of form and position
  • ISO 9139 - Procurement specification for plain or slotted nuts
  • ISO 9618 - Dimensions for hexagonal slotted reduced-height nuts
  • EN 2786 - Electrolytic silver plating of fasteners
  • EN 2000 - Approval of manufacturers' quality systems
  • EN 2367, EN 2424, TR 3823 - complementary aerospace references

This summary highlights practical value: interchangeability, defined mechanical classification, surface treatment requirements, and normative references for procurement and manufacture of aerospace-grade slotted hex nuts in heat-resisting steel.

Frequently Asked Questions

SIST EN 2809:2002 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Nuts, hexagon, slotted / castellated, reduced height, normal across flats, in heat resisting steel, silver plated - Classification: 900 MPa (at ambient temperature) / 650 °C". This standard covers: This standard specifies the characteristics of hexagonal slotted / castellated nuts, reduced height, normal across flats, in heat resisting steel, silver plated. Classification: 900 MPa ) / 650 °C )

This standard specifies the characteristics of hexagonal slotted / castellated nuts, reduced height, normal across flats, in heat resisting steel, silver plated. Classification: 900 MPa ) / 650 °C )

SIST EN 2809:2002 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 2809:2002 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-januar-2002
Aerospace series - Nuts, hexagon, slotted / castellated, reduced height, normal
across flats, in heat resisting steel, silver plated - Classification: 900 Mpa (at
ambient temperature) / 650 oC
Aerospace series - Nuts, hexagon, slotted / castellated, reduced height, normal across
flats, in heat resisting steel, silver plated - Classification: 900 MPa (at ambient
temperature) / 650 °C
Luft- und Raumfahrt - Flache Kronenmuttern mit normaler Schlüsselweite, aus
hochwarmfestem Stahl, versilbert - Klasse: 900 MPa (bei Raumtemperatur) / 650 °C
Série aérospatiale - Écrous hexagonaux a créneaux, hauteur réduite, surplats normaux,
en
acier résistant a chaud, argentés - Classification : 900 MPa (a température ambiante) /
650 °C
Ta slovenski standard je istoveten z: EN 2809:2001
ICS:
49.030.30 Matice Nuts
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 2809
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2001
ICS 49.030.30
English version
Aerospace series - Nuts, hexagon, slotted/castellated, reduced
height, normal across flats, in heat resisting steel, silver plated -
Classification: 900 MPa (at ambient temperature)/650°C
Série aérospatiale - Ecrous hexagonaux à créneaux, Luft- und Raumfahrt - Flache Kronenmuttern mit normaler
hauteur réduite, surplats normaux, en acier résistant à Schlüsselweite, aus hochwarmfestem Stahl, versilbert -
chaud, argentés - Classification: 900 MPa (à température Klasse: 900 MPa (bei Raumtemperatur)/650°C
ambiante)/650°C
This European Standard was approved by CEN on 28 February 2001.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 2809:2001 E
worldwide for CEN national Members.

Page 2
Foreword
This European Standard has been prepared by the European Association of Aerospace Manufacturers
(AECMA).
After inquiries 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
AECMA, 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 December 2001, and conflicting national standards shall be
withdrawn at the latest by December 2001.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark,
Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal,
Spain, Sweden, Switzerland and the United Kingdom.

Page 3
1 Scope
This standard specifies the characteristics of hexagonal slotted / castellated nuts, reduced height, normal
across flats, in heat resisting steel, silver plated.

1) 2)
Classification: 900 MPa / 650 °C
2 Normative references
This European Standard incorporates by dated or undated reference provisions from other publications.
These normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to
this European Standard only when incorporated in it by amendment or revision. For undated references the
l
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