SIST EN 4128:2026

SLOVENSKI STANDARD
01-april-2026
Aeronavtika - Sornik, normalna šestroba glava, široka toleranca, kratek navoj, iz
toplotnoodporne zlitine na nikljevi osnovi, prevlečeni z aluminijem IVD -
Klasifikacija: 1250 MPa (pri temperaturi okolice)/425 °C
Aerospace series - Bolt, normal hexagonal head, coarse tolerance shank, short thread,
in heat resisting nickel base alloy, aluminium IVD coated - Classification: 1 250 MPa (at
ambient temperature)/425 °C
Luft- und Raumfahrt - Sechskantschrauben, kurzes Gewinde, aus hochwarmfester
Nickelbasislegierung, Aluminium-IVD-beschichtet - Klasse: 1 250 MPa (bei
Raumtemperatur)/425 °C
Série aérospatiale - Vis à tête hexagonale normale, fût à tolérance large, filetage court,
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 4128:2026
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 4128
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2026
EUROPÄISCHE NORM
ICS 49.030.20 Supersedes EN 4128:2016
English Version
Aerospace series - Bolt, normal hexagonal head, coarse
tolerance shank, short 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, fût à Luft- und Raumfahrt - Sechskantschraube, kurzes
tolérance large, filetage court, en alliage résistant à Gewinde, aus hochwarmfester Nickelbasislegierung,
chaud base nickel, revêtue d'aluminium IVD - Aluminium-IVD-beschichtet - Klasse: 1 250 MPa (bei
Classification : 1 250 MPa (à température Raumtemperatur)/425 °C
ambiante)/425 °C
This European Standard was approved by CEN on 25 May 2025.

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
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United Kingdom.
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COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

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© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 4128:2026 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 – Masses . 5
4.2 Materials . 5
4.3 Surface treatment . 5
5 Designation . 7
6 Marking . 7
7 Technical specification . 7
7.1 General. 7
7.2 Approval of manufacturers . 7
7.3 Qualification of bolts. 8
Bibliography . 9
European foreword
This document (EN 4128:2026) 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 August 2026, and conflicting national standards shall be
withdrawn at the latest by August 2026.
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 4128:2016.
This document includes the following significant technical changes with respect to EN 4128:2016:
— normative references updated;
— Clause 3 “Terms and definitions” added;
— Figure 1, roughness deleted;
— 7.2 and 7.3 revised;
— Bibliography updated.
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.
1 Scope
This document specifies the characteristics of bolts, normal hexagonal head, coarse tolerance shank,
short thread, in heat resisting nickel base alloy, aluminium IVD coated.
1 2
Classification: 1 250 MPa /425 °C .
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For d
...