Aerospace series - Nuts, hexagonal, slotted/castellated, normal height, normal across flats, in heat resisting steel, silver plated - Classification: 1 100 MPa (at ambient temperature)/650 °C

This document specifies the characteristics of hexagonal slotted/castellated nuts, normal height, normal across flats, in heat resisting steel, silver plated.
Classification: 1 100 MPa/650 °C.

Luft- und Raumfahrt - Flache Kronenmuttern, normale Höhe, normale Schlüsselweite, aus hochwarmfestem Stahl, versilbert - Klasse: 1 100 MPa (bei Raumtemperatur)/650 °C

Diese Europäische Norm legt die Eigenschaften von flachen, versilberten Kronenmuttern mit normaler Höhe, normaler Schlüsselweite aus hochwarmfestem Stahl für Anwendungen in der Luft- und Raumfahrt fest.
Klasse: 1 100 MPa1/650 °C2.

Série aérospatiale - Écrous hexagonaux à créneaux, hauteur normale, surplats normaux, en acier résistant à chaud, argentés - Classification: 1 100 MPa (à température ambiante)/650 °C

Aeronavtika - Matice, šestrobe, z zarezo/kronske, normalna višina, z normalnim zevom ključa, iz toplotnoodpornega jekla, posrebrene - Klasifikacija: 1100 MPa (pri okoljski temperaturi)/650 °C

Ta dokument določa lastnosti šestrobih matic z zarezo/kronskih, normalne višine, z normalnim zevom ključa, iz toplotnoodpornega jekla, posrebrenih.
Klasifikacija: 1100 MPa/650 °C.

General Information

Status
Published
Publication Date
05-Mar-2019
Withdrawal Date
29-Sep-2019
ICS
49.030.30 - Nuts
 
49.060 - Aerospace electric equipment and systems
Technical Committee
ASD-STAN - Aerospace
Drafting Committee
ASD-STAN/D 3/S 2 - Fasteners
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Start Date
06-Mar-2019
Completion Date
06-Mar-2019
Ref Project
SIST EN 2868:2019 - Aerospace series - Nuts, hexagonal, slotted/castellated, normal height, normal across flats, in heat resisting steel, silver plated - Classification: 1 100 MPa (at ambient temperature)/650 °C

Overview

EN 2868:2019 is a CEN aerospace standard that specifies the characteristics of hexagonal slotted (castellated) nuts of normal height and normal across-flats dimensions, made from heat-resisting steel and electrolytically silver plated. Published in 2019 and prepared by ASD‑STAN, the standard is targeted at aerospace fasteners requiring high strength and high-temperature resistance. Classification: 1 100 MPa (at ambient temperature) / 650 °C.

Keywords: EN 2868:2019, aerospace nuts, castellated nuts, heat resisting steel, silver plated nuts, MJ threads, fastener standards.

Key Topics

  • Scope and classification
    • Applies to hexagonal slotted/castellated nuts for aerospace use with strength class 1 100 MPa and maximum service temperature 650 °C.
  • Dimensions and tolerances
    • Dimensional requirements and form tolerances follow ISO 4147 and ISO 8788 (values expressed in millimetres and apply after surface treatment).
  • Materials
    • Permitted material specifications refer to EN 2398, EN 2399, EN 3639 or TR 3823-002 for heat-resisting steels suitable for high temperature and strength.
  • Surface treatment
    • Electrolytic silver plating per EN 2786.
    • Plating thickness: external surfaces 5 µm to 15 µm; pitch diameter minimum 5 µm for MJ6 and larger; full profile coverage required for MJ5 and smaller.
  • Marking and designation
    • Marking rules reference EN 2424; standard provides designation examples and diameter‑style coding.
  • Assembly features
    • Designed to be used with split pins (see EN 2367) and MJ thread limits per ISO 5855‑2.
  • Procurement, inspection and manufacturer approval
    • Technical specification and procurement to follow ISO 9139; manufacturer approval aligned with EN 9100 (aviation quality management).

Applications

  • Critical aerospace joints exposed to high temperatures (e.g., engine, exhaust, hot-structure assemblies) where nuts must retain mechanical integrity up to 650 °C.
  • Use cases requiring castellated nuts for secure locking with split pins.
  • Replacement and specification of fasteners in repair, overhaul and new design of aerospace components.

Who should use this standard

  • Aerospace fastener manufacturers and suppliers
  • Design and stress engineers specifying high-temperature fasteners
  • Procurement and quality managers in aviation, space and defence sectors
  • Maintenance, repair and overhaul (MRO) organizations and certification bodies

Related standards

  • ISO 4147, ISO 5855-2, ISO 8788, ISO 9139
  • EN 2367, EN 2398, EN 2399, EN 2424, EN 2786, EN 3639, EN 9100

EN 2868:2019 provides the formal specification and acceptance criteria to ensure compatibility, safety and traceability of silver‑plated, heat‑resisting castellated nuts used in high‑temperature aerospace applications.

Frequently Asked Questions

EN 2868:2019 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Nuts, hexagonal, slotted/castellated, normal height, normal across flats, in heat resisting steel, silver plated - Classification: 1 100 MPa (at ambient temperature)/650 °C". This standard covers: This document specifies the characteristics of hexagonal slotted/castellated nuts, normal height, normal across flats, in heat resisting steel, silver plated. Classification: 1 100 MPa/650 °C.

This document specifies the characteristics of hexagonal slotted/castellated nuts, normal height, normal across flats, in heat resisting steel, silver plated. Classification: 1 100 MPa/650 °C.

EN 2868:2019 is classified under the following ICS (International Classification for Standards) categories: 49.030.30 - Nuts; 49.060 - Aerospace electric equipment and systems. The ICS classification helps identify the subject area and facilitates finding related standards.

You can purchase EN 2868:2019 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CEN standards.

Standards Content (Sample)


SLOVENSKI STANDARD
01-maj-2019
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]HYRPNOMXþDL]WRSORWQRRGSRUQHJDMHNODSRVUHEUHQH.ODVLILNDFLMD03D SUL
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Aerospace series - Nuts, hexagonal, slotted/castellated, normal height, normal across
flats, in heat resisting steel, silver plated - Classification: 1 100 MPa (at ambient
temperature)/650 °C
Luft- und Raumfahrt - Flache Kronenmuttern, normale Höhe, normale Schlüsselweite,
aus hochwarmfestem Stahl, versilbert - Klasse: 1 100 MPa (bei Raumtemperatur)/650 °C
Série aérospatiale - Écrous hexagonaux à créneaux, hauteur normale, surplats normaux,
en acier résistant à chaud, argentés - Classification: 1 100 MPa (à température
ambiante)/650 °C
Ta slovenski standard je istoveten z: EN 2868:2019
ICS:
49.030.30 Matice Nuts
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 2868
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2019
EUROPÄISCHE NORM
ICS 49.030.30
English Version
Aerospace series - Nuts, hexagonal, slotted/castellated,
normal height, normal across flats, in heat resisting steel,
silver plated - Classification: 1 100 MPa (at ambient
temperature)/650 °C
Série aérospatiale - Écrous hexagonaux à créneaux, Luft- und Raumfahrt - Flache Kronenmuttern, normale
hauteur normale, surplats normaux, en acier résistant Höhe, normale Schlüsselweite, aus hochwarmfestem
à chaud, argentés - Classification: 1 100 MPa (à Stahl, versilbert - Klasse: 1 100 MPa (bei
température ambiante)/650 °C Raumtemperatur)/650 °C
This European Standard was approved by CEN on 8 July 2018.

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-CENELEC 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-CENELEC 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 2868:2019 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 5
4 Required characteristics . 5
5 Designation. 8
6 Marking . 8
7 Technical specification . 8

European foreword
This document (EN 2868:2019) 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 September 2019, and conflicting national standards
shall be withdrawn at the latest by September 2019.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN 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,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

1 Scope
This European standard specifies the characteristics of hexagonal slotted/castellated nuts, nor
...

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