Aerospace series - Nuts, hexagonal, plain, normal height, normal across flats, heat resisting steel passivated - Classification: 1 100 MPa/650 °C

This standard specifies the characteristics of plain hexagonal nuts in passivated heat resisting steel, with or without locking holes, the dimensions of which are in conformity with ISO 8279.
These nuts are intended for use in aircraft assemblies, subjected principally to tension loading.
They are intended to be used with bolts of 1 100 MPa  ) tensile strength classification, at temperatures up to 650 °C.

Luft- und Raumfahrt - Sechskantmuttern, normale Höhe, normale Schlüsselweite, aus hochwarmfestem Stahl, passiviert - Klasse: 1 100 MPa/650 °C

Diese Norm legt die Eigenschaften für Sechskantmuttern aus hochwarmfestem Stahl, passiviert, mit oder
ohne Sicherungslöcher, deren Maße mit ISO 8279 übereinstimmen, fest.
Diese Muttern sind, vorwiegend unter Zugbeanspruchung, für die Anwendung in Baugruppen für Luftfahrzeuge
vorgesehen.
Sie sind für die Anwendung mit Schrauben der Zugfestigkeitsklasse 1 100 MPa1) bei Temperaturen bis zu
650 °C vorgesehen.

Série aérospatiale - Écrous hexagonaux, simples hauteur normale, surplats normaux en acier résistant à chaud passivé - Classification : 1 100 MPa/650 °C

Aeronavtika - Matice, šestrobe, drsne, z normalnim zevom ključa, iz toplotnoodpornega jekla, pasivirane - Klasifikacija: 1100 MPa/650 °C

This standard specifies the characteristics of plain hexagonal nuts in passivated heat resisting steel, with or without locking holes, the dimensions of which are in conformity with ISO 8279. These nuts are intended for use in aircraft assemblies, subjected principally to tension loading. They are intended to be used with bolts of 1 100 MPa 1) tensile strength classification, at temperatures up to 650 °C.

General Information

Status
Published
Publication Date
16-Mar-2010
Withdrawal Date
29-Sep-2010
ICS
49.030.30 - Nuts
Technical Committee
ASD-STAN - Aerospace
Drafting Committee
ASD-STAN/D 3 - Mechanical
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Start Date
17-Mar-2010
Completion Date
17-Mar-2010
Ref Project
SIST EN 2852:2010 - Aerospace series - Nuts, hexagonal, plain, normal height, normal across flats, heat resisting steel passivated - Classification: 1100 MPa/650 °C

Relations

Refers
EN 4317:2025 - Aerospace series - Heat-resisting alloy X6NiCrTiMoV26-15 (1.4980) - Consumable electrode remelted - Not heat treated - Forging stock - a or D ≤ 200 mm
Effective Date
28-Jan-2026
Refers
EN 4318:2025 - Aerospace series - Heat-resisting alloy X6NiCrTiMoV26-15 (1.4980) - Consumable electrode remelted - Solution treated and precipitation treated - Bars and sections - De ≤ 100 mm - Rm ≥ 960 MPa
Effective Date
28-Jan-2026
Referred By
EN 4840-101:2018 - Aerospace series - Heat shrinkable moulded shapes - Part 101: Polyolefin, semi-rigid, limited fire hazard - Temperature range - 30 °C to 105 °C - Product standard
Effective Date
28-Jan-2026

Overview

EN 2852:2010 is a European aerospace standard that defines requirements for plain hexagonal nuts made from passivated heat-resisting steel intended for aircraft use. The standard covers nuts of normal height and normal across-flats dimensions (in conformity with ISO 8279), supplied with or without locking holes, and designed to be used with bolts of 1 100 MPa tensile strength classification at temperatures up to 650 °C. EN 2852:2010 targets fasteners subjected principally to tension loading in aerospace assemblies.

Key topics and requirements

  • Scope and configuration
    • Plain hexagonal nuts, normal height and across flats, with optional locking holes.
    • Dimensions and tolerances consistent with ISO 8279 and form/position tolerances per ISO 8788.
  • Material
    • Heat-resisting steel as specified by EN 2171 or EN 2398.
  • Mechanical/thermal class
    • Intended for use with bolts of 1 100 MPa tensile strength (ambient classification) and service temperatures up to 650 °C.
  • Surface treatment
    • Passivation required in accordance with EN 2516 (decontamination/passivation of corrosion resisting steels and nickel-base alloys).
    • Surface roughness values are specified before passivation; thread finish is as produced by normal manufacturing.
  • Geometric features
    • Bearing surface may be flat to concave but not convex; sharp edges to be broken to 0.1–0.4 mm.
    • Configuration figures and dimensional tables (including thread codes and sizes) are provided in the standard.
  • Marking and identification
    • Marking position defined by the standard and marking styles vary by thread code (e.g., thread codes 020–040 use style G; 050–070 use E; 080–160 use C; 180–200 use A) as per EN 2852 Table 3 and marking rules in EN 2424.
  • Quality and procurement
    • Technical specification aligned with ISO 9139; aerospace quality assurance per EN 9100.

Applications

  • Designed for critical aerospace fastening applications where high temperature resistance and high tensile performance are required.
  • Typical users:
    • Aerospace design and structural engineers specifying fasteners for high-temperature components (engines, exhaust, hot-structure).
    • Fastener manufacturers producing MJ-thread hex nuts to aerospace tolerances.
    • Procurement, quality assurance, and maintenance teams ensuring compliance with material, marking, and passivation requirements.
  • Use cases: engine mounts, hot-structure assemblies, and other aircraft components exposed to elevated temperatures and primary tensile loads.

Related standards

  • ISO 8279 (dimensions for hexagonal nuts with MJ threads)
  • ISO 5855 series (MJ thread general requirements and limits)
  • ISO 8788, ISO 9139 (form tolerances and procurement)
  • EN 2171, EN 2398 (heat-resisting steels)
  • EN 2516 (passivation)
  • EN 2424 (marking)
  • EN 9100 (quality management for aerospace)

Keywords: EN 2852:2010, aerospace nuts, hexagonal nuts, heat resisting steel, passivated, 1100 MPa, 650 °C, ISO 8279, MJ threads, aerospace fasteners.

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Frequently Asked Questions

EN 2852:2010 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Nuts, hexagonal, plain, normal height, normal across flats, heat resisting steel passivated - Classification: 1 100 MPa/650 °C". This standard covers: This standard specifies the characteristics of plain hexagonal nuts in passivated heat resisting steel, with or without locking holes, the dimensions of which are in conformity with ISO 8279. These nuts are intended for use in aircraft assemblies, subjected principally to tension loading. They are intended to be used with bolts of 1 100 MPa ) tensile strength classification, at temperatures up to 650 °C.

This standard specifies the characteristics of plain hexagonal nuts in passivated heat resisting steel, with or without locking holes, the dimensions of which are in conformity with ISO 8279. These nuts are intended for use in aircraft assemblies, subjected principally to tension loading. They are intended to be used with bolts of 1 100 MPa ) tensile strength classification, at temperatures up to 650 °C.

EN 2852:2010 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.

EN 2852:2010 has the following relationships with other standards: It is inter standard links to EN 4317:2025, EN 4318:2025, EN 4840-101:2018. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

EN 2852:2010 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.L]Luft- und Raumfahrt - Sechskantmuttern, normale Höhe, normale Schlüsselweite, aus hochwarmfestem Stahl, passiviert - Klasse: 1100 MPa/650 °CSérie aérospatiale - Écrous hexagonaux, simples hauteur normale, surplats normaux en acier résistant à chaud passivé - Classification: 1100 MPa/650 °CAerospace series - Nuts, hexagonal, plain, normal height, normal across flats, heat resisting steel passivated - Classification: 1100 MPa/650 °C49.030.30MaticeNutsICS:Ta slovenski standard je istoveten z:EN 2852:2010SIST EN 2852:2010en01-maj-2010SIST EN 2852:2010SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 2852
March 2010 ICS 49.030.30 English Version
Aerospace series - Nuts, hexagonal, plain, normal height, normal across flats, heat resisting steel passivated - Classification: 1 100 MPa/650 °C
Série aérospatiale - Écrous hexagonaux, simples hauteur normale, surplats normaux en acier résistant à chaud passivé - Classification : 1 100 MPa/650 °C
Luft- und Raumfahrt - Sechskantmuttern, normale Höhe, normale Schlüsselweite, aus hochwarmfestem Stahl, passiviert - Klasse: 1 100 MPa/650 °C This European Standard was approved by CEN on 25 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 2852:2010: ESIST EN 2852:2010

This standard specifies the characteristics of plain hexagonal nuts in passivated heat resisting steel, with or without locking holes, the dimensions of which are in conformity with ISO 8279. These nuts are intended for use in aircraft
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