Aerospace series - Bolts, 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

This European Standard specifies the characteristics of bolts, normal hexagonal head, coarse tolerance shank, short thread, in heat resisting nickel base alloy, aluminium IVD coated.
Classification: 1 250 MPa 1) / 425 °C 2).

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

Diese Norm legt die Eigenschaften von Sechskantschrauben mit kurzem Gewinde aus hochwarmfester Nickelbasislegierung, mit IVD-Aluminium beschichtet, fest.
Klasse: 1 250 MPa 1) / 425 °C 2)

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

La présente Norme Européenne spécifie les caractéristiques des vis à tête hexagonale normale, fût à tolérance large, filetage court, en alliage résistant à chaud à base de nickel, revêtues d’aluminium IVD.
Classification : 1 250 MPa 1) / 425 °C 2)

Aeronavtika - Sorniki, 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

Ta evropski standard določa značilnosti sornikov: običajna šestroba glava, široka toleranca,
kratek navoj, iz toplotnoodporne zlitine na nikljevi osnovi, prevlečene z aluminijem IVD.
Klasifikacija: 1250 MPa1)/425 °C2).

General Information

Status
Published
Publication Date
10-Apr-2016
ICS
49.025.20 - Aluminium
 
49.030.20 - Bolts, screws, studs
Technical Committee
I13 - Imaginarni 13
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
31-Mar-2016
Due Date
05-Jun-2016
Completion Date
11-Apr-2016
Ref Project
EN 4128:2016 - Aerospace series - Bolts, 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

Relations

Replaces
SIST EN 4128:2009 - Aerospace series - Bolts, normal hexagonal head, coarse tolerance normal shank, short thread, in heat resisting nickel base alloy, aluminium IVD coated - Classification: 1250 MPa (at ambient temperature)/425 °C
Effective Date
01-May-2016
Revised
kSIST FprEN 4128:2025 - 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
Effective Date
19-Jan-2023

Overview

SIST EN 4128:2016 is a European Standard under the auspices of CEN, detailing specifications for aerospace-grade bolts. This standard applies to bolts featuring a normal hexagonal head, a coarse tolerance shank, and a short threaded section. These bolts are made from a heat-resistant nickel-base alloy and feature an aluminium IVD (ion vapor deposition) coating. Classified for strength and performance, they have a minimum tensile strength of 1,250 MPa at ambient temperature and withstand temperatures up to 425 °C without permanent degradation of properties.

This standard is critical for aerospace manufacturing and maintenance where high-strength, temperature-resistant fasteners are required.

Key Topics

  • Bolt Design and Dimensions: Bolts covered by EN 4128 have a normal hexagonal head and comply with dimensional and tolerance requirements aligned with ISO 3193, ensuring interchangeability and compatibility within aerospace assemblies.

  • Material Properties: The bolts are manufactured from a heat-resistant nickel-base alloy, ensuring exceptional strength and durability in high-temperature aerospace environments.

  • Surface Treatment: An aluminium IVD coating (per MIL-DTL-83488 type II, class 3, thickness 4 µm to 12 µm or EN 6118) provides corrosion resistance and extended service life. Post-coating surface treatments include mechanical blasting and chromate conversion, with optional lubrication to aid assembly.

  • Mechanical Performance: The tensile strength requirement is set at 1,250 MPa at room temperature. The bolts maintain mechanical properties up to 425 °C. The standard also specifies adaptations to fatigue and double shear test loads, applying a coefficient for accurate stress evaluation.

  • Marking & Identification: Bolts must be marked in accordance with EN 2424 for aerospace products, ensuring traceability. The marking includes diameter codes and locking hole designations for wire or split pins when applicable.

  • Manufacturer Requirements: Compliance includes adherence to EN 9100 for quality management and EN 9133 for part qualification, guaranteeing the reliability of these critical components.

Applications

EN 4128 bolts are primarily used in aerospace and defense industries where components are exposed to extreme temperatures and mechanical stresses. Key applications include:

  • Aircraft engines and structural assemblies requiring high-temperature fasteners that maintain integrity under thermal cycling.

  • Spacecraft components exposed to harsh environments demanding durability and corrosion resistance.

  • High-performance aerospace systems including turbines and exhaust assemblies, which depend on nickel-base alloy bolts for safety and longevity.

  • Maintenance and repair operations in aviation, where replacement fasteners must meet stringent performance and material classifications.

Using bolts conforming to EN 4128 ensures standardized quality, enhanced safety, and compatibility within critical aerospace applications.

Related Standards

  • EN 2424 – Aerospace series - Marking of aerospace products: Defines marking protocols for traceability and certification.

  • EN 6118 – Aerospace series - Process specification - Aluminium base protection for fasteners: Alternative specification for aluminium coating processes.

  • EN 9100 – Quality management systems - Requirements for aviation, space, and defense organizations: Quality framework applicable to manufacturers.

  • EN 9133 – Aerospace series - Qualification procedure for aerospace standard parts: Ensures components meet qualification criteria.

  • ISO 3193 – Aerospace bolts - Dimensions and tolerance standards for hexagonal head bolts.

  • ISO 7913 – Aerospace bolts and screws - Tolerances for form and position applicable to these bolts.

  • MIL-DTL-83488 – Military specification for aluminium coatings, referenced for surface treatment compliance.

Keywords: SIST EN 4128:2016, aerospace bolts, nickel base alloy bolts, aluminium IVD coating, heat resistant fasteners, aerospace standard bolts, hexagonal head bolts, aerospace standardization, bolt tensile strength, high-temperature bolts.

Frequently Asked Questions

SIST EN 4128:2016 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Bolts, 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". This standard covers: This European Standard specifies the characteristics of bolts, normal hexagonal head, coarse tolerance shank, short thread, in heat resisting nickel base alloy, aluminium IVD coated. Classification: 1 250 MPa 1) / 425 °C 2).

This European Standard specifies the characteristics of bolts, normal hexagonal head, coarse tolerance shank, short thread, in heat resisting nickel base alloy, aluminium IVD coated. Classification: 1 250 MPa 1) / 425 °C 2).

SIST EN 4128:2016 is classified under the following ICS (International Classification for Standards) categories: 49.025.20 - Aluminium; 49.030.20 - Bolts, screws, studs. The ICS classification helps identify the subject area and facilitates finding related standards.

SIST EN 4128:2016 has the following relationships with other standards: It is inter standard links to SIST EN 4128:2009, kSIST FprEN 4128:2025. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

SIST EN 4128:2016 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, kurzes Gewinde, aus hochwarmfester Nickelbasislegierung, Aluminium IVD beschichtet - Klasse: 1 250 MPa (bei Raumtemperatur) / 425 °CSérie aérospatiale - Vis à tête hexagonale normale, fût à tolérance large, filetage court, en alliage résistant à chaud à base de nickel, revêtues aluminium IVF - Classification: 1 250 MPa (à température ambiante) / 425 °CAerospace series - Bolts, 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 °C49.030.20Sorniki, vijaki, stebelni vijakiBolts, screws, studs49.025.20AluminijAluminiumICS:Ta slovenski standard je istoveten z:EN 4128:2016SIST EN 4128:2016en,fr,de01-maj-2016SIST EN 4128:2016SLOVENSKI
STANDARDSIST EN 4128:20091DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 4128
March
t r s x ICS
v {ä r u rä t r Supersedes EN
v s t zã t r r {English Version
Aerospace series æ Boltsá normal hexagonal headá coarse tolerance shanká short threadá in heat resisting nickel base Série aérospatiale æ Vis à tête hexagonale normaleá fût à tolérance largeá filetage courtá en alliage résistant à chaud à base de nickelá revêtues aluminium IVF æ
v t w
¹C
Luftæ und Raumfahrt æ Sechskantschraubená kurzes Gewindeá aus hochwarmfester Nickelbasislegierungá This European Standard was approved by CEN on
t y September
t r s wä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels
t r s x CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
v s t zã t r s x ESIST EN 4128:2016

Page European Foreword . 3 1 Scope . 4 2 Normative references . 4 3 Required characteristics . 5 4 Designation. 8 5 Marking . 8 6 Technical specification . 8 Annex A (informative)
Standard evolution form . 10
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