SIST EN 4131:2026

SLOVENSKI STANDARD
01-oktober-2026
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
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
Luft- und Raumfahrt - Sechskantschraube, mittlere Gewindelänge, aus hochwarmfester
Nickelbasislegierung, Aluminium‑IVD‑beschichtet - Klasse: 1 250 MPa (bei
Raumtemperatur)/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
Ta slovenski standard je istoveten z: EN 4131:2026
ICS:
49.025.20 Aluminij Aluminium
49.030.20 Sorniki, vijaki, stebelni vijaki Bolts, screws, studs
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 4131
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2026
EUROPÄISCHE NORM
ICS 49.030.20 Supersedes EN 4131:2009
English Version
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
Série aérospatiale - Vis à tête hexagonale normale, tige Luft- und Raumfahrt - Sechskantschraube, mittlere
normale à tolérance large, filetage moyen, en alliage Gewindelänge, aus hochwarmfester
résistant à chaud base nickel, revêtue d'aluminium IVD Nickelbasislegierung, Aluminium-IVD-beschichtet -
- Classification : 1 250 MPa (à température Klasse: 1 250 MPa (bei Raumtemperatur)/425 °C
ambiante)/425 °C
This European Standard was approved by CEN on 3 August 2026.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye 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
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 4131:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Required characteristics . 5
4.1 Configuration — Dimensions — Mass . 5
4.2 Tolerances of form and position . 5
4.3 Materials . 5
4.4 Surface treatment . 5
5 Designation . 9
6 Marking . 9
7 Technical specification . 9
7.1 General. 9
7.2 Approval of manufacturers . 9
7.3 Qualification of bolts. 10
Bibliography . 11

European foreword
This document (EN 4131:2026) has been prepared by ASD-STAN.
After enquiries and votes carried out in accordance with the rules of this Association, this document has
received the approval of the National Associations and the Official Services of the member countries of
ASD-STAN, 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 February 2027, and conflicting national standards
shall be withdrawn at the latest by February 2027.
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.
This document supersedes EN 4131:2009 + AC:2010.
This document includes the following significant technical changes with respect to
EN 4131:2009 + AC:2010:
— Clause 2, “Normative references”, has been updated;
— Clause 3, “Terms and definitions”, added;
— Table 4 (former Table 3) has been updated with new drive code references;
— the technical specification has been changed from ISO 9154 to EN 2583;
— subclause 7.4, “Other modified requirement”, has been removed.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
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, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
EN 4
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