Aerospace series - Nuts, self-locking, clip, in heat resisting steel FE-PA 92 HT (A 286), silver coated - Classification: 1 100 MPa (at ambient temperature) / 425 °C

This standard specifies the characteristics of self-locking silver coated clip nuts in FE-PA 92 HT for aerospace applications.
Classification: 1 100 MPa ) /425 °C )

Luft- und Raumfahrt - Klemmuttern, selbstsichernd, aus hochwarmfestem Stahl FE-PA 92 HT (A 286), versilbert - Klasse: 1 100 MPa (bei Raumtemperatur) / 425 °C

Diese Norm legt die Eigenschaften von selbstsichernden, versilberten Klemmmuttern aus FE PA92HT zur Verwendung in der Luft  und Raumfahrt fest.
Klasse: 1 100 MPa  )/425 °C

Série aérospatiale - Écrous à pincer, à freinage interne, an acier résistant à chaud FE-PA 92 HT (A 286), argentés - Classification: 1 100 MPa (à température ambiante) / 425 °C

Aeronavtika - Matice, samozapiralne, vijačne, iz toplotnoodpornega jekla FE-PA 92 HT (A 286), posrebrene - Klasifikacija: 1100 MPa (pri temperaturi okolice) / 425 °C

General Information

Status
Published
Publication Date
19-Jun-2008
ICS
49.030.30 - Nuts
Technical Committee
I13 - Imaginarni 13
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
11-Jun-2008
Due Date
16-Aug-2008
Completion Date
20-Jun-2008
Ref Project
EN 3241:2008 - Aerospace series - Nuts, self-locking, clip, in heat resisting steel FE-PA 92 HT (A 286), silver coated - Classification: 1 100 MPa (at ambient temperature) / 425 °C

Overview

EN 3241:2008 is a European aerospace standard that specifies the characteristics of self‑locking clip nuts made from heat‑resisting steel FE‑PA 92 HT (A‑286) with silver coating. It defines classification, dimensional limits, materials, surface treatment and marking requirements for clip nuts used in aerospace structures where elevated temperature resistance and high strength are required. Key identifiers include EN 3241:2008, classification 1 100 MPa / 425 °C, and suitability for MJ thread series.

Key topics and technical requirements

  • Scope and classification
    • Applies to self‑locking, clip (pincer) nuts for aerospace use.
    • Classification: 1 100 MPa (ambient strength class) and maximum test temperature 425 °C.
  • Configuration, dimensions and interchangeability
    • Maximum overall dimensions and interchangeability requirements are mandatory; specific forms not shown are allowed at the manufacturer’s option.
    • Dimensions and tolerances are given in millimetres and apply after coating; key sizes are presented in the standard’s Table 1 (thread designations MJ4–MJ6 etc.).
  • Material
    • Nut element: material to EN 3638 or EN 3639.
    • Clip: material to EN 3638.
  • Surface treatment
    • Electrolytic silver plating to EN 2786 with coating thickness 5 µm to 15 µm.
    • For nuts MJ6 and larger, coating thickness measured at the pitch diameter must be at least 5 µm.
    • Nuts MJ5 and smaller must show complete thread coverage.
  • Designation and marking
    • Product designation format (e.g., NUT EN 3241 - 060) and marking per EN 2424 (style F).
  • Referenced technical specification
    • Functional and test details referenced to EN 3152.

Applications and users

EN 3241:2008 targets aerospace applications requiring heat‑resistant, high‑strength fasteners, such as:

  • Aircraft structure assemblies and engine mounts where temperature resistance up to 425 °C is needed.
  • Fastener manufacturers and suppliers producing self‑locking clip nuts to aerospace quality.
  • Design and procurement engineers specifying FE‑PA 92 HT (A‑286) clip nuts for OEMs and MRO organizations.
  • Quality assurance and inspection teams ensuring dimensional, material and coating compliance.

Keywords: EN 3241:2008, clip nuts, self‑locking nuts, FE‑PA 92 HT, A‑286, silver coated, aerospace fasteners, heat resisting steel, MJ threads.

Related standards

  • EN 2424 - Marking of aerospace products
  • EN 2786 - Electrolytic silver plating of fasteners
  • EN 3152 - Technical specification for self‑locking nuts in FE‑PA 92 HT
  • EN 3638 / EN 3639 - Heat resisting alloys and forged fastener materials
  • ISO 5855‑1 / ISO 5855‑2 - MJ threads (general requirements and limits)

Frequently Asked Questions

SIST EN 3241:2008 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-PA 92 HT (A 286), silver coated - Classification: 1 100 MPa (at ambient temperature) / 425 °C". This standard covers: This standard specifies the characteristics of self-locking silver coated clip nuts in FE-PA 92 HT for aerospace applications. Classification: 1 100 MPa ) /425 °C )

This standard specifies the characteristics of self-locking silver coated clip nuts in FE-PA 92 HT for aerospace applications. Classification: 1 100 MPa ) /425 °C )

SIST EN 3241:2008 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 3241:2008 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)


SLOVENSKI STANDARD
01-september-2008
$HURQDYWLND0DWLFHVDPR]DSLUDOQHYLMDþQHL]WRSORWQRRGSRUQHJDMHNOD)(3$
+7 $ SRVUHEUHQH.ODVLILNDFLMD03D SULWHPSHUDWXULRNROLFH ƒ&
Aerospace series - Nuts, self-locking, clip, in heat resisting steel FE-PA 92 HT (A 286),
silver coated - Classification: 1 100 MPa (at ambient temperature) / 425 °C
Luft- und Raumfahrt - Klemmuttern, selbstsichernd, aus hochwarmfestem Stahl FE-PA
92 HT (A 286), versilbert - Klasse: 1 100 MPa (bei Raumtemperatur) / 425 °C
Série aérospatiale - Écrous à pincer, à freinage interne, an acier résistant à chaud FE-
PA 92 HT (A 286), argentés - Classification: 1 100 MPa (à température ambiante) / 425 °
C
Ta slovenski standard je istoveten z: EN 3241:2008
ICS:
49.030.30 Matice Nuts
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 3241
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2008
ICS 49.030.30
English Version
Aerospace series - Nuts, self-locking, clip, in heat resisting steel
FE-PA 92 HT (A 286), silver coated - Classification: 1 100 MPa
(at ambient temperature) / 425 °C
Série aérospatiale - Écrous à pincer, à freinage interne, an Luft- und Raumfahrt - Klemmuttern, selbstsichernd, aus
acier résistant à chaud FE-PA 92 HT (A 286), argentés - hochwarmfestem Stahl FE-PA 92 HT (A 286), versilbert -
Classification: 1 100 MPa (à température ambiante) / 425 Klasse: 1 100 MPa (bei Raumtemperatur) / 425 °C
°C
This European Standard was approved by CEN on 2 February 2008.

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
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 3241:2008: E
worldwide for CEN national Members.

Contents Page
Foreword.3
1 Scope.4
2 References.4
3 Required characteristics.4
3.1 Configuration – Dimensions – Tolerances – Masses.4
3.2 Material.5
3.3 Surface treatment.5
4 Designation.7
5 Marking.7
6 Technical specification.7

Foreword
This document (EN 3241:2008) 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
...

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