Aerospace series - Nuts, self-locking, clip, in heat resisting steel FE-PA2601 (A286), uncoated - Classification: 1 100 MPa (at ambient temperature) / 425 °C

This standard specifies the characteristics of self-locking clip nuts in FE-PA2601 (A286) for aerospace applications.
Classification: 1 100 MPa  ) / 425 °C  )

Luft- und Raumfahrt - Klemmuttern, selbstsichernd, aus hochwarmfestem Stahl FE-PA2601 (A286), blank - Klasse: 1 100 MPa (bei Raumtemperatur) / 425 °C

Série aérospatiale - Écrous à pincer, à freinage interne, en acier résistant à chaud FE-PA2601 (A286), non revêtus - Classification : 1 100 MPa (à température ambiante) / 425 °C

Aeronavtika - Matice, samozapiralne, vijačne, iz toplotnoodpornega jekla FE-PA2601 (A286), brez prevleke - Klasifikacija: 1 100 MPa (pri temperaturi okolice) / 425 °C

General Information

Status
Published
Publication Date
17-Jan-2008
ICS
49.030.30 - Nuts
Technical Committee
I13 - Imaginarni 13
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
08-Jan-2008
Due Date
14-Mar-2008
Completion Date
18-Jan-2008
Ref Project
EN 3240:2007 - Aerospace series - Nuts, self-locking, clip, in heat resisting steel FE-PA2601 (A286), uncoated - Classification: 1 100 MPa (at ambient temperature) / 425 °C

Overview

EN 3240:2007 specifies the characteristics of self-locking clip nuts manufactured in heat-resisting steel FE-PA2601 (A286) for aerospace applications. The standard covers uncoated clip nuts designed for MJ thread systems, defining configuration limits, material requirements, marking and product qualification. Classification is 1 100 MPa (at ambient temperature) / 425 °C, indicating suitability with high‑strength fasteners and resistance to elevated test temperatures.

Key Topics

  • Scope and purpose
    • Defines required characteristics for clip-type, self-locking nuts used in aerospace structures and assemblies.
  • Materials
    • Nut element and clip materials referenced to EN 3638 or EN 3639 (FE-PA2601 / A286 heat‑resisting alloy).
  • Mechanical classification
    • Classification: 1100 MPa strength class (compatibility with bolts tested at 100% load without nut failure) and maximum test temperature 425 °C.
  • Geometry and tolerances
    • Dimensions and tolerances are given in millimetres; maximum overall dimensions and interchangeability requirements are imposed (manufacturer may offer alternative forms within these limits).
    • Designed for MJ threads (see ISO 5855-1 and ISO 5855-2).
  • Marking and identification
    • Marking per EN 2424 to ensure traceability and compliance.
  • Qualification and quality
    • Product qualification and lot acceptance per EN 9133 (aerospace standard parts qualification).
  • Normative references
    • Key referenced documents include ISO 5855-1/-2, EN 2424, EN 3152, EN 3638, EN 3639 and EN 9133.

Applications

EN 3240 clip nuts are intended for aerospace fastener applications where:

  • High temperature resistance and high strength compatibility are required (e.g., airframe and engine accessory brackets, high‑temperature assemblies).
  • Sheet‑mounting and panel fastening require thin‑section clip nuts for rapid installation and reliable self‑locking performance.
  • OEMs, suppliers and design engineers need standardized parts for interchangeability, procurement, and certification of aerospace hardware.

Typical users:

  • Aerospace design and structural engineers
  • Fastener manufacturers and heat‑resistant alloy suppliers
  • Quality, procurement and certification teams in aerospace OEMs and Tier suppliers

Related Standards

  • ISO 5855-1 / ISO 5855-2 - MJ thread general requirements and limit dimensions
  • EN 3152 - Similar nuts in FE-PA2601 (A286), plated or uncoated - technical specification
  • EN 2424 - Marking of aerospace products
  • EN 3638 / EN 3639 - Material specifications for FE-PA2601 (A286)
  • EN 9133 - Qualification procedure for aerospace standard parts

EN 3240:2007 helps ensure consistent performance, traceability and interchangeability of self‑locking clip nuts in high‑temperature aerospace applications, supporting safe design and reliable procurement of aerospace fasteners.

Frequently Asked Questions

SIST EN 3240:2008 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Nuts, self-locking, clip, in heat resisting steel FE-PA2601 (A286), uncoated - Classification: 1 100 MPa (at ambient temperature) / 425 °C". This standard covers: This standard specifies the characteristics of self-locking clip nuts in FE-PA2601 (A286) for aerospace applications. Classification: 1 100 MPa ) / 425 °C )

This standard specifies the characteristics of self-locking clip nuts in FE-PA2601 (A286) for aerospace applications. Classification: 1 100 MPa ) / 425 °C )

SIST EN 3240:2008 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 3240:2008 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.Aerospace series - Nuts, self-locking, clip, in heat resisting steel FE-PA2601 (A286), uncoated - Classification: 1 100 MPa (at ambient temperature) / 425 °CSérie aérospatiale - Écrous à pincer, à freinage interne, en acier résistant à chaud FE-PA2601 (A286), non revêtus - Classification : 1 100 MPa (à température ambiante) / 425 °CLuft- und Raumfahrt - Klemmuttern, selbstsichernd, aus hochwarmfestem Stahl FE-PA2601 (A286), blank - Klasse: 1 100 MPa (bei Raumtemperatur) / 425 °CTa slovenski standard je istoveten z:EN 3240:2007SIST EN 3240:2008en49.030.30ICS:SLOVENSKI
STANDARDSIST EN 3240:200801-marec-2008

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 3240
December 2007 ICS 49.030.30 English Version
Aerospace series - Nuts, self-locking, clip, in heat resisting steel FE-PA2601 (A286), uncoated - Classification: 1 100 MPa (at ambient temperature) / 425 °C
Série aérospatiale - Écrous à pincer, à freinage interne, en acier résistant à chaud FE-PA2601 (A286), non revêtus - Classification : 1 100 MPa (à température ambiante) / 425 °C
Luft- und Raumfahrt - Klemmuttern, selbstsichernd, aus hochwarmfestem Stahl FE-PA2601 (A286), blank -Klasse: 1 100 MPa (bei Raumtemperatur) / 425 °C This European Standard was approved by CEN on 5 November 2007.
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: rue de Stassart, 36
B-1050 Brussels © 2007 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 3240:2007: E
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