Aerospace series - Bolts, normal hexagonal head, coarse tolerance normal shank, medium length thread, in heat resisting nickel base alloy, aluminium IVD coated - Classification: 1 250 MPa (at ambient temperature) / 425 °C

This standard specifies the characteristics of bolts, normal hexagonal head, coarse tolerance normal shank, medium length thread, in heat resisting nickel base alloy, aluminium IVD coated.
Classification: 1 250 MPa  ) / 425 °C  )

Luft- und Raumfahrt - Sechskantschrauben, mittlere Gewindelänge, aus hochwarmfester Nickelbasislegierung, Aluminum-IVD-beschichtet - Klasse: 1 250 MPa (bei Raumtemperatur)/425 °C

Diese Norm legt Eigenschaften von Sechskantschrauben mit mittlerer Gewindelänge aus hochwarmfester Nickelbasislegierung, Aluminium-IVD-beschichtet, fest.
Klasse: 1 250 MPa )/425 °C

Série aérospatiale - Vis à tête hexagonale normale, tige normale à tolérance large, filetage moyen, en alliage résistant à chaud à base de nickel, revêtues aluminium IVD - Classification : 1 250 MPa (à température ambiante) / 425 °C

Aeronavtika - Sorniki, normalna šestroba glava, široka toleranca, srednja navojna dolžina, iz toplotnoodporne zlitine na nikljevi osnovi, prevlečene z aluminijem IVD - Klasifikacija: 1250 MPa (pri temperaturi okolice)/425 °C

Ta standard opredeljuje značilnosti vijakov, z normalno šestrobo glavo, široko toleranco, srednjo navojno dolžino iz toplotnoodporne zlitine na nikljevi osnovi, prevlečene z aluminijem IVD.

General Information

Status
Published
Publication Date
14-Apr-2009
Withdrawal Date
30-Oct-2009
ICS
49.030.20 - Bolts, screws, studs
Technical Committee
ASD-STAN - Aerospace
Drafting Committee
ASD-STAN/D 3 - Mechanical
Current Stage
9093 - Decision to confirm - Review Enquiry
Start Date
21-Jan-2025
Completion Date
14-May-2025
Ref Project
SIST EN 4131:2009 - Aerospace series - Bolts, normal hexagonal head, coarse tolerance normal shank, medium length thread, in heat resisting nickel base alloy, aluminium IVD coated - Classification: 1 250 MPa (at ambient temperature) / 425° C

Relations

Corrected By
EN 4131:2009/AC:2010 - Aerospace series - Bolts, normal hexagonal head, coarse tolerance normal shank, medium length thread, in heat resisting nickel base alloy, aluminium IVD coated - Classification: 1 250 MPa (at ambient temperature) / 425 °C
Effective Date
20-Mar-2010
Revised
prEN 4131 - Aerospace series - Bolt, normal hexagonal head, coarse tolerance normal shank, medium length thread, in heat resisting nickel base alloy, aluminium IVD coated - Classification: 1 250 MPa (at ambient temperature) / 425 °C
Effective Date
12-Feb-2025

Overview

EN 4131:2009 is a CEN aerospace standard that defines the characteristics of bolts with a normal hexagonal head, coarse tolerance normal shank and medium length MJ thread, manufactured from a heat‑resisting nickel‑base alloy with aluminium IVD coating. The bolts are classified for a minimum tensile strength of 1 250 MPa at ambient temperature and a maximum service temperature of 425 °C (the latter depends on surface treatment). EN 4131:2009 covers geometry, tolerances, material classes, surface treatment and marking for use in aerospace and defence applications.

Key topics

  • Configuration and dimensions: Hexagonal head bolts with diameter and length codes (per EN 4131 tables); dimensions and tolerances expressed in millimetres and apply after coating. Threads conform to MJ series (ISO 5855-2 / ISO 3353-1).
  • Materials: Heat‑resisting nickel‑base alloy classified to meet the 1 250 MPa requirement (referenced standards include EN 2952, EN 3219, TR 3775).
  • Surface treatment: Aluminium immersion/IVD coating per MIL‑DTL‑83488D Type II Class 3 (7–20 µm). After deposition, mechanical blasting and chromate conversion coating within 24 hours are required; optional lubrication with cethylic alcohol (code E).
  • Form and position tolerances: ISO 7913 applies for geometric tolerances. Dimensions are per ISO 3193 conventions.
  • Marking and designation: Standardized identification format (example: EN4131H050040E) and marking styles in line with EN 2424.
  • Quality and approval: Manufacturer approval and quality systems per EN 9100; qualification of bolts via EN 9133. Test load factor and modified testing: apply coefficient 0.81.

Applications

EN 4131:2009 is intended for aerospace and defence fastener specifications where high temperature resistance and high tensile strength are required. Typical uses include:

  • Airframe and engine components exposed to elevated temperatures
  • Structural assemblies in helicopters, fixed‑wing aircraft and spacecraft
  • OEM procurement specifications and supplier contracts for aerospace fasteners
  • Quality assurance, incoming inspection and lot acceptance testing in manufacturing and MRO

Primary users: design engineers, procurement specialists, fastener manufacturers, quality managers, test laboratories and maintenance organizations within the aerospace supply chain.

Related standards

  • EN 2424 (marking of aerospace products)
  • EN 2952, EN 3219, TR 3775 (material references)
  • MIL‑DTL‑83488D (aluminium coating specification)
  • ISO 3193, ISO 5855‑2, ISO 7913, ISO 3353‑1 (thread and tolerance standards)
  • EN 9100, EN 9133 (quality systems and part qualification)

Keywords: EN 4131:2009, aerospace bolts, hexagonal head bolts, nickel base alloy bolts, aluminium IVD coating, heat resisting fasteners, 1250 MPa, 425 °C.

Frequently Asked Questions

EN 4131:2009 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Bolts, normal hexagonal head, coarse tolerance normal shank, medium length thread, in heat resisting nickel base alloy, aluminium IVD coated - Classification: 1 250 MPa (at ambient temperature) / 425 °C". This standard covers: This standard specifies the characteristics of bolts, normal hexagonal head, coarse tolerance normal shank, medium length thread, in heat resisting nickel base alloy, aluminium IVD coated. Classification: 1 250 MPa ) / 425 °C )

This standard specifies the characteristics of bolts, normal hexagonal head, coarse tolerance normal shank, medium length thread, in heat resisting nickel base alloy, aluminium IVD coated. Classification: 1 250 MPa ) / 425 °C )

EN 4131:2009 is classified under the following ICS (International Classification for Standards) categories: 49.030.20 - Bolts, screws, studs. The ICS classification helps identify the subject area and facilitates finding related standards.

EN 4131:2009 has the following relationships with other standards: It is inter standard links to EN 4131:2009/AC:2010, prEN 4131. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

EN 4131:2009 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.Luft- und Raumfahrt - Sechskantschrauben, mittlere Gewindelänge, aus hochwarmfester Nickelbasislegierung, Aluminum IVD beschichtet - Klasse : 1 250 MPa (bei Raumtemperatur) / 425° CSérie aérospatiale - Vis à tête hexagonale normale, tige normale à tolérance large, filetage moyen, en alliage résistant à chaud à base de nickel, revêtues aluminium IVD - Classification : 1 250 MPa (à température ambiante) / 425 °CAerospace series - Bolts, normal hexagonal head, coarse tolerance normal shank, medium length thread, in heat resisting nickel base alloy, aluminium IVD coated - Classification: 1 250 MPa (at ambient temperature) / 425° C49.030.20Sorniki, vijaki, stebelni vijakiBolts, screws, studs49.025.20AluminijAluminiumICS:Ta slovenski standard je istoveten z:EN 4131:2009SIST EN 4131:2009en01-junij-2009SIST EN 4131:2009SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 4131
April 2009 ICS 49.030.20 English Version
Aerospace series - Bolts, normal hexagonal head, coarse tolerance normal shank, medium length thread, in heat resisting nickel base alloy, aluminium IVD coated - Classification: 1 250 MPa (at ambient temperature) / 425 °C
Série aérospatiale - Vis à tête hexagonale normale,
tige normale à tolérance large, filetage moyen, en alliage résistant à chaud à base de nickel, revêtues aluminium IVD - Classification : 1 250 MPa (à température ambiante) / 425 °C
Luft- und Raumfahrt - Sechskantschrauben, mittlere Gewindelänge, aus hochwarmfester Nickelbasislegierung, Aluminum IVD beschichtet - Klasse : 1 250 MPa (bei Raumtemperatur) / 425 °C This European Standard was approved by CEN on 12 March 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, 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 © 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4131:2009: ESIST EN 4131:2009
...

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